SIST EN 10217-7:2021

SLOVENSKI STANDARD
01-junij-2021
Nadomešča:
SIST EN 10217-7:2015
Varjene jeklene cevi za tlačne posode - Tehnični dobavni pogoji - 7. del: Cevi iz
nerjavnega jekla
Welded steel tubes for pressure purposes - Technical delivery conditions - Part 7:
Stainless steel tubes
Geschweißte Stahlrohre für Druckbeanspruchungen - Technische Lieferbedingungen -
Teil 7: Rohre aus nichtrostenden Stählen
Tubes soudés en acier pour service sous pression - Conditions techniques de livraison -
Partie 7 : Tubes en aciers inoxydables
Ta slovenski standard je istoveten z: EN 10217-7:2021
ICS:
23.020.32 Tlačne posode Pressure vessels
77.140.75 Jeklene cevi in cevni profili Steel pipes and tubes for
za posebne namene specific use
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 10217-7
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2021
EUROPÄISCHE NORM
ICS 23.040.10; 77.140.75 Supersedes EN 10217-7:2014
English Version
Welded steel tubes for pressure purposes - Technical
delivery conditions - Part 7: Stainless steel tubes
Tubes soudés en acier pour service sous pression - Geschweißte Stahlrohre für Druckbeanspruchungen -
Conditions techniques de livraison - Partie 7 : Tubes en Technische Lieferbedingungen - Teil 7: Rohre aus
aciers inoxydables nichtrostenden Stählen
This European Standard was approved by CEN on 12 March 2021.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10217-7:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 7
4 Symbols . 7
5 Classification and designation . 7
5.1 Classification . 7
5.2 Designation. 8
6 Information to be supplied by the purchaser . 8
6.1 Mandatory information . 8
6.2 Options . 8
6.3 Examples of an order . 9
6.3.1 Example 1 . 9
6.3.2 Example 2 . 10
7 Manufacturing process . 10
7.1 Steelmaking process . 10
7.2 Tube manufacture and conditions . 10
8 Requirements . 13
8.1 General . 13
8.2 Chemical composition . 13
8.2.1 Cast analysis . 13
8.2.2 Product analysis . 13
8.3 Mechanical properties . 16
8.3.1 At room temperature . 16
8.3.2 At elevated temperature . 17
8.3.3 At low temperature . 17
8.4 Corrosion resistance . 23
8.5 Appearance and internal soundness. 23
8.5.1 Appearance . 23
8.5.2 Internal soundness . 24
8.6 Straightness . 24
8.7 Preparation of ends . 24
8.8 Dimensions, masses and tolerances . 25
8.8.1 Outside diameter and wall thickness . 25
8.8.2 Mass . 25
8.8.3 Lengths . 25
8.8.4 Tolerances . 25
9 Inspection . 27
9.1 Type of inspection . 27
9.2 Inspection documents . 27
9.2.1 Types of inspection documents. 27
9.2.2 Content of inspection documents . 28
9.3 Summary of inspection and verification testing . 28
10 Sampling . 29
10.1 Test unit . 29
10.2 Preparation of samples and test pieces . 30
10.2.1 Selection and preparation of samples for product analysis. 30
10.2.2 Location, orientation and preparation of samples and test pieces for mechanical
tests . 30
11 Verification test methods . 32
11.1 Chemical analysis . 32
11.2 Tensile test on the base material . 32
11.2.1 At room temperature . 32
11.2.2 At elevated temperature . 32
11.3 Transverse tensile test on the weld . 32
11.4 Technological tests . 32
11.4.1 General . 32
11.4.2 Flattening test . 33
11.4.3 Ring tensile test . 33
11.4.4 Drift expanding test . 33
11.4.5 Ring expanding test . 34
11.5 Weld bend test . 34
11.6 Impact test . 34
11.7 Intergranular corrosion test. 35
11.8 Leak tightness test . 35
11.8.1 Hydrostatic test . 35
11.8.2 Eddy current test . 35
11.9 Dimensional inspection . 36
11.10 Visual examination . 36
11.11 Non-destructive testing . 36
11.12 Material identification . 37
11.13 Retests, sorting and reprocessing . 37
12 Marking . 37
12.1 Marking to be applied . 37
12.2 Additional marking . 37
13 Handling and packaging . 38
Annex A (informative) Technical changes from the previous edition . 39
A.1 Introduction. 39
A.2 Technical changes . 39
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of Directive 2014/68/EU aimed to be covered. 41
Bibliography . 42

European foreword
This document (EN 10217-7:2021) has been prepared by Technical Committee CEN/TC 459/SC 10
“Steel tubes and iron and steel fittings”, the secretariat of which is held by UNI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by October 2021, and conflicting national standards shall
be withdrawn at the latest by October 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 10217-7:2014.
The main changes with respect to the previous edition are listed in Annex A.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive 2014/68/EU.
For relationship with EU Directive 2014/68/EU, see informative Annex ZA, which is an integral part of
this document.
EN 10217 consists of the following parts, under the general title Welded steel tubes for pressure
purposes — Technical delivery conditions:
— Part 1: Electric welded and submerged arc welded non-alloy steel tubes with specified room
temperature properties;
— Part 2: Electric welded non-alloy and alloy steel tubes with specified elevated temperature properties;
— Part 3: Electric welded and submerged arc welded alloy fine grain steel tubes with specified room,
elevated and low temperature properties;
— Part 4: Electric welded non-alloy and alloy steel tubes with specified low temperature properties;
— Part 5: Submerged arc welded non-alloy and alloy steel tubes with specified elevated temperature
properties;
— Part 6: Submerged arc welded non-alloy steel tubes with specified low temperature properties;
— Part 7: Stainless steel tubes.
Another European Standard series covering tubes for pressure purposes is:
EN 10216, Seamless steel tubes for pressure purposes.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
1 Scope
This document specifies the technical delivery conditions in two test categories for welded tubes of
circular cross-section made of austenitic and austenitic-ferritic stainless steel which are intended for
pressure and corrosion resisting purposes at room temperature, at low temperatures or at elevated
temperatures.
NOTE Once the reference of this document is published in the Official Journal of the European Union (OJEU)
under Directive 2014/68/EU, pressure equipment directive, presumption of conformity to the Essential Safety
Requirements (ESR) of Directive 2014/68/EU is limited to technical data of materials in this document and does
not presume adequacy of the material to a specific item of equipment. Consequently, the assessment of the
technical data stated in this material standard against the design requirements of this specific item of equipment
to verify that the ESRs of the Pressure Equipment Directive are satisfied, needs to be done by the designer of the
pressure equipment, taking also into account the subsequent manufacturing processes which could affect
properties of the base materials.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 10020:2000, Definition and classification of grades of steel
EN 10021:2006, General technical delivery conditions for steel products
EN 10027-1:2016, Designation systems for steels - Part 1: Steel names
EN 10027-2:2015, Designation systems for steels - Part 2: Numerical system
EN 10028-7:2016, Flat products made of steels for pressure purposes - Part 7: Stainless steels
EN 10088-1:2014, Stainless steels - Part 1: List of stainless steels
EN 10168:2004, Steel products - Inspection documents - List of information and description
EN 10204:2004, Metallic products - Types of inspection documents
EN 10266:2003, Steel tubes, fittings and structural hollow sections - Symbols and definitions of terms for
use in product standards
CEN/TR 10261:2018, Iron and steel - European standards for the determination of chemical composition
EN ISO 148-1:2016, Metallic materials - Charpy pendulum impact test - Part 1: Test method (ISO 148-
1:2016)
EN ISO 377:2017, Steel and steel products - Location and preparation of samples and test pieces for
mechanical testing (ISO 377:2017)
EN ISO 1127:1996, Stainless steel tubes - Dimensions, tolerances and conventional masses per unit length
(ISO 1127:1992)
EN ISO 2566-2:1999, Steel - Conversion of elongation values - Part 2: Austenitic steels (ISO 2566-2:1984)
EN ISO 3651-2:1998, Determination of resistance to intergranular corrosion of stainless steels - Part 2:
Ferritic, austenitic and ferritic-austenitic (duplex) stainless steels - Corrosion test in media containing
sulfuric acid (ISO 3651-2:1998)
EN ISO 4885:2018, Ferrous materials - Heat treatments - Vocabulary (ISO 4885:2018)
EN ISO 5173:2010, Destructive tests on welds in metallic materials - Bend tests (ISO 5173:2009)
EN ISO 6892-1:2019, Metallic materials - Tensile testing - Part 1: Method of test at room temperature
(ISO 6892-1:2019)
EN ISO 6892-2:2018, Metallic materials - Tensile testing - Part 2: Method of test at elevated temperature
(ISO 6892-2:2018)
EN ISO 8492:2013, Metallic materials - Tube - Flattening test (ISO 8492:2013)
EN ISO 8493:2004, Metallic materials - Tube - Drift-expanding test (ISO 8493:1998)
EN ISO 8495:2013, Metallic materials - Tube - Ring-expanding test (ISO 8495:2013)
EN ISO 8496:2013, Metallic materials - Tube - Ring tensile test (ISO 8496:2013)
EN ISO 9712:2012, Non-destructive testing - Qualification and certification of NDT personnel
(ISO 9712:2012)
EN ISO 10893-1:2011, Non-destructive testing of steel tubes - Part 1: Automated electromagnetic testing
of seamless and welded (except submerged arc-welded) steel tubes for the verification of hydraulic
leaktightness (ISO 10893-1:2011)
EN ISO 10893-2:2011, Non-destructive testing of steel tubes - Part 2: Automated eddy current testing of
seamless and welded (except submerged arc-welded) steel tubes for the detection of imperfections
(ISO 10893-2:2011)
EN ISO 10893-6:2019, Non-destructive testing of steel tubes - Part 6: Radiographic testing of the weld
seam of welded steel tubes for the detection of imperfections (ISO 10893-6:2019)
EN ISO 10893-7:2019, Non-destructive testing of steel tubes - Part 7: Digital radiographic testing of the
weld seam of welded steel tubes for the detection of imperfections (ISO 10893-7:2019)
EN ISO 10893-8:2011, Non-destructive testing of steel tubes - Part 8: Automated ultrasonic testing of
seamless and welded steel tubes for the detection of laminar imperfections (ISO 10893-8:2011)
EN ISO 10893-9:2011, Non-destructive testing of steel tubes - Part 9: Automated ultrasonic testing for
the detection of laminar imperfections in strip/plate used for the manufacture of welded steel tubes
(ISO 10893-9:2011)
As impacted by EN ISO 10893-1:2011/A1:2020.
As impacted by EN ISO 10893-2:2011/A1:2020.
As impacted by EN ISO 10893-8:2011/A1:2020.
As impacted by EN ISO 10893-9:2011/A1:2020.
EN ISO 10893-10:2011, Non-destructive testing of steel tubes - Part 10: Automated full peripheral
ultrasonic testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of
longitudinal and/or transverse imperfections (ISO 10893-10:2011)
EN ISO 10893-11:2011, Non-destructive testing of steel tubes - Part 11: Automated ultrasonic testing of
the weld seam of welded steel tubes for the detection of longitudinal and/or transverse imperfections
(ISO 10893-11:2011)
EN ISO 14284:2002, Steel and iron - Sampling and preparation of samples for the determination of
chemical composition (ISO 14284:1996)
ISO 11484:2019, Steel products — Employer's qualification system for non-destructive testing (NDT)
personnel
3 Terms and definitions
For the purpose of this document, the terms and definitions given in EN 10020:2000, EN 10021:2006,
EN ISO 4885:2018 and EN 10266:2003 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
test category
classification that indicates the extent and level of inspection and testing
3.2
employer
organization for which a person works on a regular basis
Note 1 to entry: The employer may be either the tube manufacturer or supplier or a third party organization
providing non-destructive testing (NDT) services.
4 Symbols
For the purpose of this document, the symbols given in EN 10266:2003 and the following apply.
— TC test category.
NOTE See also Table 2 for symbols of the delivery condition.
5 Classification and designation
5.1 Classification
According to the classification system in EN 10020:2000, the steel grades are classified as:
— austenitic steels (corrosion resisting);

As impacted by EN ISO 10893-10:2011/A1:2020.
As impacted by EN ISO 10893-11:2011/A1:2020.
— austenitic-ferritic steels.
5.2 Designation
For the tubes covered by this document the steel designation consists of:
— the number of this document (EN 10217-7);
plus either:
— the steel name according to EN 10027-1:2016;
or:
— the steel number allocated according to EN 10027-2:2015.
6 Information to be supplied by the purchaser
6.1 Mandatory information
The following information shall be supplied by the purchaser at the time of enquiry and order:
a) the quantity (mass or total length or number);
b) the term “tube”;
c) the dimensions (outside diameter D and wall thickness T) (see 8.8.1);
d) the designation of the steel grade according to this document (see 5.2);
e) the test category (see 9.3).
6.2 Options
A number of options are specified in this document and these are listed below. In the event that the
purchaser does not indicate a wish to implement any of these options at the time of enquiry and order,
the tube shall be supplied in accordance with the basic specification (see 6.1).
1) Information about steelmaking process (see 7.1);
2) Tube manufacturing process and/or route (see 7.2.1);
3) The inside weld is remelted (see Table 1);
4) The inside weld is worked by rolling, remelting or grinding (see Table 1);
5) Delivery condition (see 7.2.3);
6) Product analysis (see 8.2.2);
7) Additional verifications of mechanical properties on samples that have undergone a different or
additional heat treatment (see 8.3.1);
8) Verification of impact energy at room temperature (see 8.3.1);
9) Verification of proof strength R or R at elevated temperatures (see 8.3.2);
p0,2 p1,0
10) Verification of impact energy at low temperature (see 8.3.3);
11) Intergranular corrosion test (see 8.4);
12) Repair welding (see 8.5.1.5);
13) Selection of method for verification of leak-tightness test method (see 8.5.2.2);
14) Non-destructive testing of tube ends for detection of laminar imperfections (see 8.5.2.3);
15) Non-destructive testing of strip and plate edges for detection of laminar imperfections (see 8.5.2.3);
16) Special ends preparation (see 8.7);
17) Exact lengths (see 8.8.3);
18) Tolerance class D 4 for D ≤ 168,3 mm (see Table 10);
19) The type of inspection certificate 3.2 in place of the standard document (see 9.2.1);
20) Transverse tensile test on the weld (see 10.2.2.3);
21) Test pressure for hydrostatic leak-tightness test (see 11.8.1);
22) Wall thickness measurement away from the ends (see 11.9);
23) Selection of non- destructive testing method for the inspection of the weld seam (see Table 16);
24) Image quality class B of EN ISO 10893-6 for the radiographic inspection of the weld seam (see
Table 16);
25) Additional marking (see 12.2);
26) Special protection (see Clause 13);
27) Image quality class B of EN ISO 10893-7 for the digital radiographic testing of the weld (see
Table 16);
28) Different values for the maximum height of the weld seam are to be agreed in the purchase order
(see Table 11);
29) Height of the weld seam for tubes with route 01, 05, 06 and 07 (according to Table 1) and with
thicknesses over 8 mm: maximum 4 mm (see Table 11).
6.3 Examples of an order
6.3.1 Example 1
2 000 m of welded tube W1 (see Table 2) with an outside diameter of 168,3 mm, a wall thickness of
4,5 mm, tolerance classes D 3 and T 3, in accordance with this document, made of steel grade X2CrNi19-
11, test category 1, with a 3.1 inspection certificate according to EN 10204:
EXAMPLE 2 000 m - Tube - 168,3 × 4,5 - EN 10217-7- X2CrNi19–11 - TC 1 - Option 5: W1
6.3.2 Example 2
300 m of cold finished welded tube WCA (see Table 2) with an outside diameter of 42,4 mm, a wall
thickness of 2,6 mm, tolerance classes D 3 and T 3, in accordance with this document, made of steel
grade 1.4301, test category 2, with intergranular corrosion test (EN ISO 3651-2, method A), verification
of proof strength at 300 °C, non-destructive testing of strip edges for detection of laminar imperfections,
with a 3.2 inspection certificate according to EN 10204 issued by the manufacturer:
EXAMPLE 300 m - Tube - 42,4 × 2,6 - EN 10217-7 - 1.4301 - TC 2 - Option 5: WCA - Option 9: 300 °C - Option
11: A - Option 15 - Option 19: 3.2 (to be issued by the manufacturer)
7 Manufacturing process
7.1 Steelmaking process
The steelmaking process is at the discretion of the manufacturer, but see Option 1.
Option 1: The purchaser shall be informed about the steelmaking process used. The process shall be
reported in the inspection document.
7.2 Tube manufacture and conditions
7.2.1 The tubes shall be manufactured from hot or cold rolled plate, sheet or strip in accordance with
EN 10028-7:2016. They shall be longitudinally welded by fusion across the abutting edges using either
an arc welding or a laser welding or an electron beam welding process, or a combination thereof. The
definitions of these respective fusion welding methods are given in ISO/TR 25901-3:2016, 4.2. Welding
can be performed with or without the addition of filler metal in accordance with one of the routes as
specified in Table 1.
Unless Option 2 is specified, the manufacturing process and/or route are at the discretion of the
manufacturer.
Option 2: The tube manufacturing process and/or route is specified by the purchaser.
The finished tubes shall not include welds used for joining together lengths of the hot or cold rolled
strip prior to forming.
Option 3: (see Table 1).
Option 4: (see Table 1).
7.2.2 The production (welding) process shall be qualified and approved under the tube manufacture’s
own QA system.
NOTE For tubes to be used in pressure equipment under categories II, III, or IV of European Legislation for
pressure equipment, the relevant operating procedures and personnel for permanent joints will be approved by a
competent third party.
Table 1 — Tube manufacturing process, route, starting material, forming operation and weld
condition
1 2 3 4 5
Manufacturing
b
Route Starting material Forming operation Weld condition
a
process
c e
As welded
Hot or cold rolled Continuous forming
c e
Welded, outside ground
Arc welding
strip from strip
or bead worked *
03 Welded, bead worked *
c
Hot or cold rolled Continuous forming Welded, outside ground or
04 Laser welding
strip from strip bead worked *
Hot or cold rolled Single forming from
d e
05 Arc welding As welded
plate or sheet plate or sheet
Laser welding and Hot or cold rolled Single forming from
d e
As welded
arc welding ** plate or sheet plate or sheet
Electron beam
Hot or cold rolled Single forming from
d e
07 welding and arc
As welded
plate or sheet plate or sheet
welding **
* Bead worked = bead rolled or bead hammered.
** For these tubes, i.e. tubes welded from plate or sheet, the laser welding and the electron beam
welding processes are normally used in combination with an arc welding process.
a
Tubes with outside diameter not exceeding 168,3 mm may additionally be brought to the required tube
b
dimensions by cold working (see type of condition WCA and WCR in Table 2).
b
The terms “as-welded”, “welded, outside ground”, “bead worked” and “cold working” apply to the condition
of the tube before heat treatment if required in accordance with Table 2.
c
On request, the inside weld can be re-melted. Option 3: The inside weld is re-melted.
d
On request, the inside weld can be worked by rolling, remelting or grinding. Option 4: The inside weld is
worked by rolling, remelting or grinding.
e
The weld seam can be welded using one or more separate layers.
7.2.3 The types of delivery condition of the tubes are shown in Table 2. Unless Option 5 is specified,
the selection of type of delivery condition is at the discretion of the manufacturer.
Option 5: The type of delivery condition is specified by the purchaser.
Table 2 — Delivery conditions
a
Symbol Type of delivery condition Surface condition
Welded from hot or cold rolled plate, sheet or strip
b f
W0 As welded
1D, 2D, 2E, 2B, 2R
Welded from hot rolled plate, sheet or strip 1D,
b
W1
e
descaled and/or pickled
Metallically clean
Welded from hot rolled plate, sheet or strip 1D, heat
b
W1A
e
treated, descaled and/or pickled
Welded from hot rolled plate, sheet or strip 1D,
b
Metallically bright
W1R
bright annealed
Welded from cold rolled plate, sheet or strip 2D, 2E,
b
W2
e
2B, 2R, descaled and/or pickled
Metallically clean
Welded from cold rolled plate, sheet or strip 2D, 2E,
b
W2A
e
2B, 2R, heat treated, descaled and/or pickled
Welded from cold rolled plate, sheet or strip 2D, 2E,
b
W2R Metallically bright
2B, 2R, bright annealed
Welded from hot rolled or cold rolled plate, sheet or
strip 1D, 2D, 2E, 2B, 2R, heat treated if appropriate,
Metallically clean, weld scarcely
WCA
at least 20 % cold formed, heat treated, with re- recognizable
e
crystallized weld metal, descaled and/or pickled
Welded from hot rolled or cold rolled plate, sheet or
strip 1D, 2D, 2E, 2B, 2R, heat treated if appropriate, Metallically bright, weld scarcely
WCR
at least 20 % cold formed, bright annealed, with re- recognizable
crystallized weld metal
Metallically bright-ground, the type
and degree of grinding shall be
c
WG
Ground
agreed at the time of enquiry and
d
order
Metallically bright-polished, the type
and degree of polishing shall be
c
WP
Polished
agreed at the time of enquiry and
d
order
a
Symbols of flat products according to EN 10028-7:2016.
b
For tubes ordered with smoothed inside welds (“bead worked”) letter “b” shall be appended to the symbol
for the delivery condition (e.g. W2Ab).
c
Conditions W2, W2A, W2R, WCA or WCR are usually used as the starting condition.
d
It should be indicated in the enquiry or order whether grinding or polishing is to be performed internally or
externally, or internally and externally.
e
Unless specified at the time of the order the method of descaling and/or pickling is at the discretion of the
manufacturer.
f
Tubes may have residual scale, welding colours and grease residue.
8 Requirements
8.1 General
When supplied in a delivery condition indicated in 7.2.3 and inspected according to Clauses 9, 10 and
11, the tubes shall conform to the requirements of this document. In addition, the general technical
delivery requirements specified in EN 10021:2006 shall apply.
8.2 Chemical composition
8.2.1 Cast analysis
The cast analysis reported by the steel manufacturer shall apply and conform to the requirements of
Table 3 for austenitic steel and of Table 4 for austenitic-ferritic steel.
When welding tubes produced according to this document, account should be taken of the fact that the
behaviour of the steel during and after welding is dependent not only on the steel, but also on the
applied heat treatment and the conditions of preparing for and carrying out the welding.
8.2.2 Product analysis
Option 6: Product analysis for the tubes shall be supplied.
Table 5 specifies the permissible deviation of the product analysis from the specified limits on cast
analysis given in Tables 3 and 4.
a
Table 3 — Chemical composition (cast analysis) of austenitic steels, in % by mass
Steel grade
C Si Mn P S
N Cr Cu Mo Ni Others
max max max max max
Steel name Steel number
X2CrNi18–9 1.4307 0,030 1,00 2,00 0,045 0,015 ≤ 0,10 17,5 to 19,5 _ _ 8,0 to 10,5 _
X2CrNi19–11 1.4306 0,030 1,00 2,00 0,045 0,015 ≤ 0,10 18,0 to 20,0 _ _ 10,0 to 12,0 _
X2CrNiN18–10 1.4311 0,030 1,00 2,00 0,045 0,015 0,12 to 0,22 17,5 to 19,5 _ _ 8,5 to 11,5 _
X5CrNi18–10 1.4301 0,07 1,00 2,00 0,045 0,015 ≤ 0,10 17,5 to 19,5 _ _ 8,0 to 10,5 _
X6CrNiTi18–10 1.4541 0,08 1,00 2,00 0,045 0,015 _ 17,0 to 19,0 _ _ 9,0 to 12,0 Ti 5xC to 0,70
X6CrNiNb18–10 1.4550 0,08 1,00 2,00 0,045 0,015 _ 17,0 to 19,0 _ _ 9,0 to 12,0 Nb 10xC to 1,00
X2CrNiMo17–12–2 1.4404 0,030 1,00 2,00 0,045 0,015 ≤ 0,10 16,5 to 18,5 _ 2,00 to 2,50 10,0 to 13,0 _
X5CrNiMo17–12–2 1.4401 0,07 1,00 2,00 0,045 0,015 ≤ 0,10 16,5 to 18,5 _ 2,00 to 2,50 10,0 to 13,0 _
X6CrNiMoTi17–12–2 1.4571 0,08 1,00 2,00 0,045 0,015 _ 16,5 to 18,5 _ 2,00 to 2,50 10,5 to 13,5 Ti 5xC to 0,70
X2CrNiMo17–12–3 1.4432 0,030 1,00 2,00 0,045 0,015 ≤ 0,10 16,5 to 18,5 _ 2,50 to 3,0 10,5 to 13,0
X2CrNiMoN17–13–3 1.4429 0,030 1,00 2,00 0,045 0,015 0,12 to 0,22 16,5 to 18,5 _ 2,50 to 3,0 11,0 to 14,0 _
X3CrNiMo17–13–3 1.4436 0,05 1,00 2,00 0,045 0,015 ≤ 0,10 16,5 to 18,5 _ 2,50 to 3,0 10,5 to 13,0 _
X2CrNiMo18–14–3 1.4435 0,030 1,00 2,00 0,045 0,015 ≤ 0,10 17,0 to 19,0 _ 2,50 to 3,0 12,5 to 15,0 _
X2CrNiMoN17–13–5 1.4439 0,030 1,00 2,00 0,045 0,015 0,12 to 0,22 16,5 to 18,5 _ 4,0 to 5,0 12,5 to 14,5 _
X2CrNiMo18–15–4 1.4438 0,030 1,00 2,00 0,045 0,015 ≤ 0,10 17,5 to 19,5 _ 3,0 to 4,0 13,0 to 16,0 _
X1NiCrMoCu31–27–4 1.4563 0,020 0,70 2,00 0,030 0,010 ≤ 0,10 26,0 to 28,0 0,70 to 1,50 3,0 to 4,0 30,0 to 32,0 _
X1NiCrMoCu25–20–5 1.4539 0,020 0,70 2,00 0,030 0,010 ≤ 0,15 19,0 to 21,0 1,20 to 2,00 4,0 to 5,0 24,0 to 26,0 _
X1CrNiMoCuN20–18–7 1.4547 0,020 0,70 1,00 0,030 0,010 0,18 to 0,25 19,5 to 20,5 0,50 to 1,00 6,0 to 7,0 17,5 to 18,5 _
X1NiCrMoCuN25–20–7 1.4529 0,020 0,50 1,00 0,030 0,010 0,15 to 0,25 19,0 to 21,0 0,50 to 1,50 6,0 to 7,0 24,0 to 26,0 _
a
Elements not listed in this table shall not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast. All appropriate precautions are to be taken to

avoid the addition of such elements from scrap and other materials used in production which would impair mechanical properties and the suitability of the steel.
a
Table 4 — Chemical composition (cast analysis) of austenitic-ferritic steels, in % by mass
Steel grade
b b
P S
C Si Mn
N Cr Cu Mo Ni Others
max max max
max max
Steel name Steel number
Austenitic-ferritic steels
X2CrNiMoN22–5-3 1.4462 0,030 1,00 2,00 0,035 0,015 0,10 to 0,22 21,0 to 23,0 _ 2,50 to 3,5 4,5 to 6,5 _
X2CrNiN23–4 1.4362 0,030 1,00 2,00 0,035 0,015 0,05 to 0,20 22,0 to 24,0 0,10 to 0,60 0,10 to 0,60 3,5 to 5,5 _
X2CrNiMoN25–7-4 1.4410 0,030 1,00 2,00 0,035 0,015 0,20 to 0,35 24,0 to 26,0 _ 3,0 to 4,5 6,0 to 8,0 _
X2CrNiMoCuWN25–7-4 1.4501 0,030 1,00 1,00 0,035 0,015 0,20 to 0,30 24,0 to 26,0 0,50 to 1,00 3,0 to 4,0 6,0 to 8,0 W 0,50 to 1,00
a
Elements not listed in this table shall not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast. All appropriate precautions are to be taken
to avoid the addition of such elements from scrap and other materials used in production which would impair mechanical properties and the suitability of the steel.
b
For tubes welded without filler material the sum of sulphur and phosphorus shall be maximum 0,040 %.
Table 5 — Permissible deviations of the product analysis from specified limits on cast analysis
given in Tables 3 and 4
Limiting value for the cast analysis Permissible deviation of the product
a
according to Tables 3 and 4
analysis
Element
% by mass % by mass
≤ 0,030 + 0,005
Carbon
> 0,030 to ≤ 0,08 ±0,01
Silicon ≤ 1,00 + 0,05
≤ 1,00 + 0,03
Manganese
> 1,00 to ≤ 2,00 + 0,04
≤ 0,030 + 0,003
Phosphorus
> 0,030 to ≤ 0,045 + 0,005
Sulphur ≤ 0,015 + 0,003
Nitrogen ≤ 0,35 ±0,01
≥ 16,5 to ≤ 20,0 ±0,20
Chromium
> 20,0 to ≤ 28,0 ±0,25
≤ 1,00 ±0,07
Copper
> 1,00 to ≤ 2,00 ±0,10
≤ 0,60 ±0,03
Molybdenum
≥ 2,00 to ≤ 7,0 ±0,10
Niobium ≤ 1,00 ±0,05
≤ 5,0 ±0,07
> 5,0 to ≤ 10,0 ±0,10
Nickel
> 10,0 to ≤ 20,0 ±0,15
> 20,0 to ≤ 32,0 ±0,20
Titanium ≤ 0,70 ±0,05
Tungsten ≤ 1,00 ±0,05
a
If several product analyses are carried out on one cast, and the contents of an individual element determined
lie outside the permissible range of the chemical composition specified for the cast analysis, then it is only
allowed to exceed the permissible maximum value or to fall short of the permissible minimum value, but not
both for one cast.
8.3 Mechanical properties
8.3.1 At room temperature
The mechanical properties of the tubes shall conform to the requirements in Tables 6 and 7 and in
Clause 11 irrespective of whether they are verified or not (see Table 13).
If heat treatments different from, or additional to, the reference heat treatment, are to be carried out
after the delivery of the tubes, the purchaser may request, at the time of enquiry and order, additional
mechanical tests on samples, that have been given heat treatments different from or additional to, those
given in Tables 6 and 7. The heat treatment of the samples and the mechanical properties to be
obtained from tests on them shall be agreed at the time of enquiry and order.
Option 7: Additional mechanical tests on samples, which have undergone a different or additional heat
treatment, shall be carried out.
Option 8: Impact test shall be carried out at room temperature (see Tables 6 and 7). The location of the
test pieces, either from the weld or opposite to the weld, shall be agreed at the time of enquiry and order.
8.3.2 At elevated temperature
The minimum proof strength R and R values at elevated temperatures are specified in Tab
...