SIST EN 2157-3:2001

• Abstract:

  The present standard specifies the particular requirements for steel forgings produced from forging stock complying with EN 2157-2. This standard shall be used in conjunction with EN 2157-1. This standard also applies to pre-production forgings intended for the qualification of the method of manufacture and inspection.

• Status: Published
• Publication Date: 31-Dec-2000
• ICS: 49.025.10 - Steels
• Technical Committee: SS SPL - Technical Board for the general field
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jan-2001
• Due Date: 01-Jan-2001
• Completion Date: 01-Jan-2001
• Ref Project: EN 2157-3:1993 - Aerospace series - Steel - Forging stock and forgings - Technical specification - Part 3: Pre-production and production forgings

• Referred By: SIST EN 4466:2009 - Aerospace series - Steel FE-PM1506 (X5CrNiMoAl13-8-2) - Vacuum induction melted and consumable electrode remelted - Solution treated and precipitation treated - Forgings - a or D ≤ 150 mm - Rm ≥ 1 400 MPa
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3468:2020 - Aerospace series - Steel X8CrNiTi18-10 (1.4878/1.4544) - Softened - 500 MPa ≤ Rm ≤ 700 MPa - Forgings - De ≤ 100 mm
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3631:2008 - Aerospace series - Fluid fittings, flanged, 90° elbowed - Sealing by O-ring for 0,8 mm thick tubes
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3631:2015 - Aerospace series - Fluid fittings, flanged, 90° elbowed - Sealing by O-ring for 0,8 mm thick tubes
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3507:2009 - Aerospace series - Steel FE-PL1501 (30CrMo12) - Air melted - Hardened and tempered - Forgings - De ≤ 100 mm - 930 MPa ≤ Rm ≤ 1 080 MPa
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 4098:2007 - Aerospace series - Steel FE-PL1507 (40CrMoV12) - Remelted, hardened and tempered, forgings De <= 50 mm, 1 250 MPa <= Rm <= 1 400 MPa
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 2816:2019 - Aerospace series - Steel FE-PM1802 (X5CrNiCu15-5) - Consumable electrode remelted - Solution treated and precipitation treated - Forgings - a or D ≤ 200 mm - Rm ≥ 965 MPa
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3491:2009 - Aerospace series - Steel FE-PM3901 (X15CrNi17-3) - Air melted - Hardened and tempered - Forgings - De ≤ 100 mm - 900 MPa ≤ Rm ≤ 1 100 MPa
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3486:2020 - Aerospace series - Steel FE-PM67 - Solution annealed and precipitation hardened - 1 400 ≤ Rm ≤ 1 550 MPa - Forgings - De ≤ 100 mm
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3470:2019 - Aerospace series - Steel FE-PM1503 (X3CrNiMoAl13-8-2) - Vacuum induction melted and consumable electrode remelted - Solution treated and precipitation treated - Forgings - a or D ≤ 150 mm - 1 200 MPa ≤ Rm ≤ 1 400 MPa
• Effective Date: 28-Jan-2026

SIST EN 2157-3:2001 is a Slovene standard published by SIST and identical to EN 2157-3:1993. It specifies the particular requirements for steel forgings made from forging stock complying with EN 2157-2, for aerospace use. The standard is used together with EN 2157-1, and it also applies to pre-production forgings used to qualify the manufacturing and inspection methods.

What does SIST EN 2157-3:2001 specify?

SIST EN 2157-3:2001 specifies the special requirements for steel forgings in the Aerospace series, Part 3. It covers both production forgings and pre-production forgings, with the pre-production case used to qualify the method of manufacture and inspection.

In practice, this means the standard is not a general forging guide. It is the part to use when the forgings are for aerospace applications and the starting stock already complies with EN 2157-2.

What are the key requirements of SIST EN 2157-3:2001?

SIST EN 2157-3:2001 focuses on the supply chain and qualification path for aerospace steel forgings. The main points in the scope are:

• The forgings shall be produced from forging stock complying with EN 2157-2.
• The standard shall be used in conjunction with EN 2157-1.
• The scope covers production forgings.
• The scope also covers pre-production forgings.
• Pre-production forgings are intended for qualification of the method of manufacture and inspection.

For a buyer or quality manager, this means the part must be selected together with the other referenced parts of the series. For a manufacturer, it means the forging route and inspection approach are part of the intended use of the standard, not an afterthought.

What terms does SIST EN 2157-3:2001 define?

SIST EN 2157-3:2001 uses these key terms in its title and scope:

• Forging stock - the starting material used to make the forgings covered by the standard.
• Forgings - the finished or near-finished shaped steel parts made by forging.
• Pre-production forgings - forgings used before full production to qualify the manufacturing and inspection method.
• Production forgings - forgings intended for regular production supply.
• Method of manufacture and inspection - the manufacturing route and inspection approach that pre-production forgings are used to qualify.

These terms matter because the standard distinguishes between qualification pieces and production parts, which affects planning, approval, and inspection records.

Who uses SIST EN 2157-3:2001?

SIST EN 2157-3:2001 is used by organizations involved in aerospace steel forgings. Typical users include forging manufacturers, aerospace suppliers, quality managers, inspection teams, and buyers who specify forged steel parts.

It is especially relevant when a company needs to qualify a forging process or confirm that the supplied stock and forgings fit the aerospace series requirements. In practice, it helps teams agree on what part of the series applies to procurement, production, and inspection.

Which standards are used with SIST EN 2157-3:2001?

Standard	What it contributes
EN 2157-1	The common part that SIST EN 2157-3:2001 shall be used with.
EN 2157-2	The forging stock standard that the starting material shall comply with.

Together, these standards frame the requirements for the forging stock and the forgings made from it.

What does the SIST EN 2157-3:2001 document contain?

SIST EN 2157-3:2001 is a technical specification in the Aerospace series for steel forging stock and forgings. The published document includes the multilingual title block, the classification data, and the scope statement that links this part to EN 2157-1 and EN 2157-2.

As a standards document, its purpose is to specify how pre-production and production forgings are covered in the series. For readers, that means the document is mainly a requirements reference for aerospace forging specification, qualification, and inspection planning.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Steel - Forging stock and forgings - Technical specification - Part 3: Pre-production and production forgingsLuft- und Raumfahrt - Stahl - Schmiedevormaterial und Schmiedestücke - Technische Lieferbedingungen - Teil 3: Ausfallmuster- und SerienmusterstückeSérie aérospatiale - Acier - Produits destinés a la forge - Pieces forgées et pieces matricées - Spécification technique - Partie 3: Pieces typ
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