SIST EN 4383:2009

Overview

EN 4383:2006 is a CEN (ASD‑STAN) aerospace series standard that specifies requirements for the heat‑resisting nickel‑base alloy NI‑CH2601 (NiCr19Fe19Nb5Mo3) supplied as non heat treated remelting stock. It defines form, melting method, delivery condition, mechanical properties and inspection/qualification links for material used in high‑temperature aerospace applications. The standard is part of the EN metallic materials family for aerospace and is intended for use by manufacturers, purchasers and qualification authorities.

Key topics and requirements

• Material designation: NI‑CH2601, nominally NiCr19Fe19Nb5Mo3 - a nickel‑base, heat‑resisting alloy (nickel with ~19% Cr, ~19% Fe, ~5% Nb, ~3% Mo).
• Form and production: Specified as remelting stock produced by vacuum melting.
• Delivery condition:Non heat treated (delivery condition code U).
• Mechanical properties (as supplied):
  • Proof stress Rp0.2 ≥ 755 MPa
  • Tensile strength Rm ≥ 860 MPa
  • Elongation A ≥ 5%
  • Reduction of area Z ≥ 8%
  • Hardness HB 323 – 409
• Reference heat treatment: Detailed in the standard - e.g., 1090 °C ±10 °C for 1–2 h followed by air cooling, then 940–980 °C for 1 h and air cooling (see standard for exact sequence and tolerances).
• Testing and inspection: Test-piece and inspection requirements reference EN 2103‑2 for remelting stock and EN 2043 for product qualification; external and internal defect criteria follow EN 2103‑2.
• Qualification: Product qualification programme to be agreed between manufacturer and purchaser; EN 2043 applies.

Applications

• Used where high temperature resistance and mechanical strength are critical in aerospace components: high‑temperature structural parts, hot‑section components, and applications requiring remelted nickel‑base feedstock for subsequent processing.
• Primary users:
  • Materials engineers and alloy suppliers specifying remelting stock for aerospace manufacture
  • Procurement and quality assurance teams assessing compliance of supplied remelting stock
  • Foundries, remelters and fabricators who melt and process high‑temperature nickel alloys
  • Certification and qualification bodies responsible for component material approval

Related standards

• EN 2103‑2 - Steel, nickel and cobalt remelting stock: technical specification (Part 2: Remelting stock)
• EN 2043 - General requirements for semi‑finished product qualification (aerospace)
• EN 4258 - Organization of aerospace metallic material standards
• EN 4500‑3 - Rules for drafting heat‑resisting alloy material standards

EN 4383:2006 is essential when specifying or procuring NI‑CH2601 remelting stock for aerospace use, ensuring consistent chemistry, manufacturing route (vacuum melting), mechanical properties and an agreed qualification route.