BS EN 4471-2007 PDF

Full title and description

Aerospace series — Steel FE‑PM1505 (X1CrNiMoAlTi12‑9‑2). Vacuum induction melted and consumable‑electrode remelted. Solution treated and precipitation treated. Forgings — a or D ≤ 150 mm — Rm ≥ 1 300 MPa. This EN specifies the chemical, metallurgical, heat‑treatment and mechanical requirements for high‑strength stainless steel FE‑PM1505 intended for critical aerospace forgings.

Abstract

EN 4471:2007 defines composition, production route (vacuum induction melting plus consumable‑electrode remelting), required heat treatments (solution treatment and precipitation hardening), dimensional limits for forgings (thickness or diameter ≤ 150 mm) and minimum tensile strength (Rm ≥ 1 300 MPa) for steel grade FE‑PM1505 used in aerospace components. It is part of the aerospace materials series intended to ensure repeatable mechanical and corrosion‑resistant properties for safety‑critical parts.

General information

• Status: Published / adopted as an identical national standard (EN 4471:2007; confirmed/adopted by several national bodies).
• Publication date: EN text dated 2007 (national adoptions recorded Oct–Nov 2007); BSI adoption published as BS EN 4471:2007 (BS publication date listed as 30 June 2008).
• Publisher: CEN (European Committee for Standardization) — published and available via national standards bodies; BSI is the publisher of the British adoption (BS EN 4471:2007).
• ICS / categories: 49.025.10 — Steels (metallic materials for aerospace).
• Edition / version: EN 4471:2007 (adopted nationally in 2007; referenced as BS EN 4471:2007 for the UK adoption).
• Number of pages: Typical national editions list between 6 and 14 pages; the common BSI edition is shown as 10 pages.

Scope

This standard specifies requirements for the aerospace steel grade FE‑PM1505 (chemical identity X1CrNiMoAlTi12‑9‑2) produced by vacuum induction melting and consumable‑electrode remelting, followed by solution treatment and precipitation hardening. It applies to forgings and forged parts with nominal thickness or diameter (a or D) up to 150 mm and requires a minimum tensile strength (Rm) of 1 300 MPa. The standard covers material designation, required microstructural and mechanical properties, heat‑treatment cycles, and inspection/testing to demonstrate compliance.

Key topics and requirements

• Material designation and chemical composition for FE‑PM1505 (X1CrNiMoAlTi12‑9‑2).
• Melting and remelting routes: vacuum induction melting and consumable‑electrode remelting to ensure low inclusions and controlled chemistry.
• Heat treatment: solution treatment and precipitation hardening (specified cycles and acceptance criteria).
• Mechanical properties: minimum tensile strength Rm ≥ 1 300 MPa and associated requirements for proof stress, elongation and impact where specified.
• Dimensional application: forgings or forged parts with a or D ≤ 150 mm.
• Inspection, sampling and testing requirements (mechanical tests, metallography, hardness and certification/traceability documentation).
• Marking, certification and delivery documentation required for aerospace procurement and quality assurance.

Typical use and users

Primary users are aerospace material engineers, specification writers, procurement and quality assurance teams, forging and heat‑treatment suppliers, and certification bodies that supply or approve high‑strength stainless steel forgings for aircraft and aero‑engine components. The standard is used to specify material purchase requirements, acceptance tests, and supplier qualification criteria for safety‑critical parts.

Related standards

EN 4471 is part of a series of aerospace material standards; related or cross‑referenced documents include other EN/Aerospace series standards dealing with material specifications, testing and complementary grades (examples cited in national catalogs include EN 4258, EN 4346 and related aerospace steel standards). For procurement always check the latest list of normative references in the published edition.

Keywords

FE‑PM1505, X1CrNiMoAlTi12‑9‑2, aerospace steel, vacuum induction melting, consumable electrode remelt, solution treated, precipitation hardened, forgings, Rm ≥ 1300 MPa, EN 4471:2007, BS EN 4471.

FAQ

Q: What is this standard?

A: EN 4471:2007 (adopted as BS EN 4471:2007 in the UK) is a materials standard that specifies the requirements for aerospace grade steel FE‑PM1505 (X1CrNiMoAlTi12‑9‑2) produced by vacuum induction melting and consumable‑electrode remelting, including heat‑treatment and mechanical property limits.

Q: What does it cover?

A: It covers material identification, permitted production routes, heat‑treatment requirements (solution and precipitation treatment), mechanical property limits (notably Rm ≥ 1 300 MPa), size limits for forgings (a or D ≤ 150 mm), and associated inspection and documentation requirements for aerospace use.

Q: Who typically uses it?

A: Aerospace manufacturers, material engineers, forging and heat‑treatment suppliers, procurement and QA teams, and conformity assessment bodies that specify or verify high‑strength stainless steel forgings for aircraft and engine applications.

Q: Is it current or superseded?

A: EN 4471 was published in 2007 and has been adopted by national bodies (several national catalogs list the standard as active/confirmed). Users should verify the current status with the relevant national standards body (for example BSI for BS EN editions or AENOR/EVS/STN for local adoptions) before using it for procurement or certification.

Q: Is it part of a series?

A: Yes — it is part of the aerospace series of material standards covering steels and other metallic materials used in the aerospace sector; related ENs define complementary grades, tests and delivery conditions. Consult the normative references in the published edition for the exact series relationships.

Q: What are the key keywords?

A: FE‑PM1505; X1CrNiMoAlTi12‑9‑2; aerospace steel; vacuum induction melting; consumable electrode remelt; precipitation hardening; solution treatment; forgings; Rm ≥ 1300 MPa; EN 4471:2007; BS EN 4471.