ISO 4954:2022

Overview

ISO 4954:2022 - Steels for cold heading and cold extruding specifies requirements for non‑alloy and alloy steels supplied as wire rod, wire or bars and intended for cold heading or cold extruding. The standard defines chemical, mechanical and metallurgical requirements, delivery conditions and inspection/testing procedures. It includes specific requirements in normative annexes for:

• steels not intended for heat treatment (diameters 2 mm to 100 mm) - Annex A
• case‑hardening steels (2 mm to 100 mm) - Annex B
• steels for quenching and tempering, incl. boron‑alloyed grades (2 mm to 100 mm) - Annex C
• stainless steels (austenitic 0.8–50 mm, ferritic up to 25 mm, martensitic up to 100 mm) - Annex D

Note: Except for Annex A, ISO 4954:2022 applies primarily to properties of cold‑headed/extruded parts that receive subsequent heat treatment. Properties of parts left un‑heat‑treated depend heavily on forming conditions and should be agreed between purchaser and manufacturer.

Key topics and technical requirements

ISO 4954:2022 covers practical and testable requirements, including:

• Classification and designation of steels for cold forming
• Chemical composition and limits for alloying elements
• Mechanical properties (tensile, hardness) and hardenability (where applicable)
• Grain size and carbide spheroidization criteria (Annexes A–C)
• Non‑metallic inclusions and internal soundness limits
• Aptitude to cold forming, including upsetting tests for stainless and non‑stainless steels
• Surface quality, decarburization control and corrosion resistance for stainless steels
• Shape, dimensions and tolerances, sampling, inspection, non‑destructive testing and test methods
• Marking, packaging and traceability requirements

The standard also references commonly used test methods and related ISO documents (e.g., ISO 642 Jominy test, ISO 643 grain size, ISO 6892 tensile testing, EN 10204 inspection documents).

Practical applications and users

ISO 4954:2022 is essential for:

• Manufacturers of fasteners, bolts, rivets and cold‑formed components
• Steel mills and wire‑rod producers supplying material for cold forming
• OEMs in automotive, aerospace, electronics and hardware specifying cold‑headed/extruded parts
• Quality managers, procurement teams and testing laboratories ensuring compliance with metallurgical and dimensional requirements
• Heat treatment and finishing shops that process cold‑formed components

Using ISO 4954 helps ensure material consistency, predictable forming performance, and reliable post‑forming properties after heat treatment.

Related standards

Relevant standards referenced or complementary to ISO 4954:2022 include: ISO 377, ISO 642, ISO 643, ISO 6892‑1, ISO 6508‑1, ISO 10474 and EN 10204. These support sampling, testing and certification practices used alongside ISO 4954.