EN 4314:2025

Overview

EN 4314:2025 is a European standard developed by CEN to define the specific requirements for the aerospace-grade heat-resisting alloy X4NiCrTiMoV26-15 (1.4680). This standard applies to consumable electrode remelted forging stock that has not undergone heat treatment, with cross-sectional dimensions (a or D) up to 250 mm. Tailored for aerospace applications, EN 4314:2025 ensures consistent quality and performance of this critical material under demanding operational conditions.

The heat-resisting alloy X4NiCrTiMoV26-15 is known for its superior mechanical properties, high resistance to elevated temperatures, and structural integrity without heat treatment, making it ideal for aerospace forging stocks. This updated standard supersedes EN 4314:2007, incorporating refined technical requirements and updated material designations.

Key Topics

• Material Composition: Specifies precise chemical elements ranges, including Chromium (Cr), Nickel (Ni), Titanium (Ti), Molybdenum (Mo), and Vanadium (V), ensuring optimal heat resistance and mechanical strength.
• Manufacturing Process: Covers the consumable electrode remelting method to enhance alloy purity and structural consistency.
• Forging Stock Specifications: Details dimensional limits (a or D ≤ 250 mm) for manufacturing aerospace components.
• Mechanical Properties: Defines mandatory mechanical characteristics such as minimum proof stress (580 MPa), tensile strength (≥ 850 MPa), elongation (≥ 20%), and hardness (≥ HB 235), essential for aerospace-grade materials.
• Testing and Inspection: Mandates requirements for visual examination, ultrasonic testing for internal imperfections, dimensional verification, and product qualification programs per EN 2043 and EN 2860-2.
• Delivery Conditions: Specifies the alloy as supplied in a non-heat treated condition, coded as 'U' in the standard, providing clear guidance for manufacturing and downstream processing.
• Standard Integration: References complementary aerospace metallic material standards such as EN 4258 and EN 4500-003 for comprehensive material standardization.

Applications

The EN 4314:2025 standard is critical for the aerospace sector, particularly in manufacturing heat-resisting components that require high strength and durability under thermal stress. Typical applications include:

• Turbine and engine component forgings
• Structural aerospace parts exposed to high temperatures
• High-performance aerospace hardware requiring superior corrosion resistance and mechanical stability without additional heat treatment
• Producing forging stocks for aircraft and spacecraft parts adhering to stringent quality and safety regulations

Using EN 4314:2025 ensures manufacturers deliver consistent and reliable materials, optimizing production efficiency and enhancing the lifespan and safety of aerospace components.

Related Standards

EN 4314:2025 aligns with and references several key standards to maintain uniformity in aerospace material quality and testing:

• EN 2043 – General requirements for semi-finished product qualification in aerospace metallic materials.
• EN 2860-2 – Technical specifications for forging stock and forgings of heat-resisting alloys, providing detailed production and inspection protocols.
• EN 4258 – Defines the overall organization and structure of metallic materials standardization in aerospace.
• EN 4500-003 – Rules for drafting and presenting material standards, specifically for heat-resisting alloys in aerospace.

Adherence to these interconnected standards supports a comprehensive framework for the production, testing, and certification of aerospace-grade alloys, ensuring materials meet the highest safety and performance criteria.

Keywords: EN 4314:2025, aerospace heat-resisting alloy, X4NiCrTiMoV26-15, forging stock, consumable electrode remelted, aerospace material standards, non heat treated alloy, aerospace forgings, mechanical properties, material qualification, EN 2860-2, EN 2043, aerospace metallurgy.