Overview
ISO 16143-4:2023 - Stainless steels for general purposes - Part 4: Bright products specifies the technical delivery requirements for bright stainless-steel bars supplied in drawn, peeled/turned or additionally ground conditions. The standard covers bright products intended for mechanical purposes (e.g., machine parts) and use at high temperature, including creep‑resistant applications. It defines requirements for surface condition, dimensional accuracy, traceability and tests needed to ensure fitness for purpose.
Key topics and technical requirements
ISO 16143-4:2023 addresses the following core subjects:
- Scope & classification: classification of stainless-steel grades by structure (austenitic, ferritic, martensitic, austenitic‑ferritic, precipitation‑hardening).
- Designation: standard naming conventions and cross-references for steel grades.
- Purchaser information: mandatory and optional data the buyer must supply when ordering bright products.
- Manufacturing process & surface condition: definitions and delivery conditions for drawn, peeled/turned and ground bars; surface quality expectations.
- Traceability: cast traceability requirements to support quality control and conformity.
- Requirements:
- Chemical composition
- Mechanical properties (tensile, hardness, where applicable)
- Internal soundness
- Shape, dimensions and tolerances (ovality, out‑of‑shape, ruling section concept)
- Surface quality
- Inspection and testing: prescribed inspection documents, testing frequency, verification methods (chemical analysis, tensile testing at room and elevated temperature, Brinell/ hardness, Charpy impact where applicable), dimensional checks and retests.
- Marking and documentation: guidance on product marking and delivery paperwork.
- Normative and informative annexes: steel grade tables, equivalent ruling section determination, supplementary requirements, straightness evaluation methods, cross‑reference designation tables.
Practical applications and who uses this standard
ISO 16143-4:2023 is used by:
- Steel manufacturers and cold‑working mills to define production and delivery requirements for bright bars.
- Procurement and quality teams in engineering and manufacturing organizations to specify accepted materials for machine parts and high‑temperature components.
- Design engineers needing reliable material specifications for precision shafts, fasteners and components exposed to elevated temperatures or creep conditions.
- Inspection and testing laboratories for implementing the standard test methods and inspection frequencies.
Related standards
Key related documents cited in ISO 16143-4:2023 include:
Keywords: ISO 16143-4:2023, stainless steels, bright products, drawn bars, peeled/turned, ground bars, technical delivery requirements, mechanical properties, high-temperature, creep-resistant, inspection and testing.
