SIST EN 2947:2009

SIST EN 2947:2009 is the Slovenian adoption of EN 2947:2006 for aerospace metallic materials. It specifies requirements for FE-PA3004 (X10CrNi18-09) steel wire that is air melted, non heat treated, cold drawn, and sized at a or D ≤ 2,3 mm. It is written for suppliers, purchasers, and qualification teams who need a defined material, test route, and acceptance basis for this wire.

What does SIST EN 2947:2009 specify?

SIST EN 2947:2009 specifies the requirements for a particular aerospace wire product: FE-PA3004 (X10CrNi18-09) steel in the air-melted, non heat treated, cold-drawn condition. The standard fixes the material identity, manufacturing route, size limit, and the quality checks used to judge conformity.

The document is organized around scope, normative references, material designation, melting method, form and production method, technical specification, delivery condition, property limits, inspection, typical use, and product qualification. In practice, that means it tells a buyer and a manufacturer what the wire is, how it is made, how it is tested, and what supporting standard is used for qualification.

What are the key requirements of SIST EN 2947:2009?

SIST EN 2947:2009 ties the product to one exact material designation and product form: FE-PA3004 (X10CrNi18-09) steel, made as wire, cold drawn, for aerospace applications, with a or D limited to 2,3 mm. This matters because the standard only applies when the requested wire matches that combination of grade, route, and size.

Chemical make-up

The standard gives a chemistry table for C, Si, Mn, P, S, Cr, Mo, Ni, Cu and Fe. For users, this is the basis for mill certificates and incoming verification, so the delivered wire can be traced to the specified alloy balance.

Melting, forming and delivery condition

SIST EN 2947:2009 requires air melting, wire form, cold drawing, and a non heat treated delivery condition. The delivery condition code is U, which tells the purchaser that the wire is supplied in the as-drawn state rather than after heat treatment.

Mechanical property limits

The standard sets mechanical property limits by wire size range. It uses proof stress Rp0,2 and tensile strength Rm as the main strength measures, with the required tensile strength changing with diameter band and the proof stress linked to Rm by a specified range. For a user, this means the acceptance check is not one single value for all sizes - the wire must be tested against the correct size band.

Test orientation and temperature

Test pieces are taken in the longitudinal direction (L) and tested at ambient temperature. That matters in practice because test results depend on the specimen direction and the test condition, so the laboratory must prepare the samples correctly.

Inspection and verification

For wire inspection, the standard points to reverse torsion, bending, wrapping, external defects, marking inspection, and dimensional inspection through EN 4700-4. This gives the acceptance route for surface condition, geometry, and handling behavior before the wire is released.

Product qualification

Product qualification is linked to EN 2043, and the qualification programme is to be agreed between manufacturer and purchaser. In practice, that means the approval plan is part of the supply agreement and must be settled before qualification testing starts.

What terms does SIST EN 2947:2009 define?

• FE-PA3004 (X10CrNi18-09) - the steel grade covered by the standard.
• Air melted - the specified melting route for the steel.
• Cold drawn - the wire manufacturing process used to achieve the final product condition.
• Non heat treated - the delivery condition required by the standard.
• Rp0,2 - 0,2% proof stress, used to show when permanent deformation begins.
• Rm - tensile strength, the main strength value used in the property table.
• L - longitudinal test-piece direction, meaning the specimen is taken along the wire axis.

Who uses SIST EN 2947:2009?

SIST EN 2947:2009 is used by aerospace material suppliers, wire manufacturers, buyers, and quality managers who need a common specification for procurement and acceptance. Test laboratories use it to prepare specimens and run the required inspections, while qualification teams use it when setting up the agreed product qualification programme.

The standard is also relevant where the intended use is wire for threaded inserts and springs. That helps engineers and purchasers judge whether the wire form, condition, and property checks match the intended part.

Which standards are used with SIST EN 2947:2009?

• EN 2043 - gives the general requirements for semi-finished product qualification and supports the qualification programme.
• EN 4258 - sets the general organization of aerospace metallic material standardization.
• EN 4500-5 - gives the rules for drafting and presenting steel material standards.
• EN 4700-4 - provides the technical specification for wire, including sample preparation and the inspection methods referenced by this standard.

What does the SIST EN 2947:2009 document contain?

SIST EN 2947:2009 contains a chemical composition table, a material designation, and the manufacturing and delivery-condition requirements for the wire. It also contains size-dependent property tables for proof stress and tensile strength, so the acceptance limits can be matched to the wire diameter range.

The document points several inspection activities to EN 4700-4, including reverse torsion, bending, wrapping, external defects, marking, and dimensional checks. It also includes a typical-use note and a qualification clause for agreement between manufacturer and purchaser.