SIST EN 2174:2018

Overview

SIST EN 2174:2018 specifies requirements for the heat resisting alloy FE-PA2602 (X4NiCrTiMoV26-15), focusing on solution treated and precipitation treated forgings with a diameter not exceeding 100 mm and achieving a minimum tensile strength (Rm) of 850 MPa. Developed for aerospace applications, this European standard ensures that materials used in critical aerospace components meet stringent performance and reliability criteria. It is part of the EN metallic materials series for aerospace, supporting the industry's need for high-strength, heat-resistant alloys.

Key Topics

• Material Specifications: FE-PA2602 (X4NiCrTiMoV26-15) is defined by strict chemical composition and processing requirements to guarantee material quality and performance.
• Heat and Precipitation Treatment: The standard covers both solution heat treatment and subsequent precipitation treatment processes, ensuring the alloy's strength and resistance at high temperatures essential for aerospace forgings.
• Product Scope: Applies specifically to forgings with up to 100 mm diameter where tensile strength (Rm) must be at least 850 MPa.
• Manufacturing Processes: Details refer to recognized processes, including consumable electrode remelting and production from forging stock per EN 4314, ensuring traceability and consistent material properties.
• Testing and Quality Assurance: References to EN 4700-006 explain procedures for sampling, heat treatment, and inspection, reinforcing the rigorous quality controls expected for aerospace applications.

Applications

The alloy and forging requirements outlined in SIST EN 2174:2018 have distinct applications in the aerospace sector:

• Aircraft Structural Components: Used for engine and airframe parts that demand exceptional heat resistance and mechanical strength.
• High-Temperature Parts: Suitable for components operating under intense thermal and mechanical loads, such as turbine discs, shafts, and other critical elements.
• Aerospace Safety: Ensures that forgings meet international safety and reliability benchmarks, minimizing risk in flight-critical applications.
• OEM and Supply Chain Compliance: Enables manufacturers and suppliers to deliver products that satisfy stringent aerospace industry requirements and regulatory mandates across Europe.

Related Standards

Manufacturers and engineers using SIST EN 2174:2018 will benefit from referencing related standards that together provide a comprehensive framework for aerospace materials:

• EN 4258: Organizes general standardization for aerospace metallic materials, linking types of standards and their use.
• EN 4314: Specifies requirements for non-heat-treated FE-PA2602 forging stock, ensuring material consistency before further processing.
• EN 4500-003: Defines rules for drafting and presenting heat resisting alloy standards in the aerospace series.
• EN 4700-006: Addresses technical specifications and requirements for pre-production and production forgings in steel and heat resisting alloys.

Practical Value

Implementing SIST EN 2174:2018 delivers multiple benefits:

• Quality Assurance: Guarantees the use of high-integrity, high-strength alloys tailored for extreme environments.
• Regulatory Compliance: Assists organizations in meeting European and international aerospace material standards.
• Risk Mitigation: Reduces the likelihood of material-related failures in service by mandating rigorous testing and traceability.
• Global Compatibility: Facilitates harmonized production and supply of aerospace components across different countries and organizations.

SIST EN 2174:2018 remains a critical standard for any organization involved in the production, specification, or procurement of high-strength, heat resistant forgings for aerospace use, underpinning both performance and safety.