ISO 16143-2:2014

Overview

ISO 16143-2:2014 - "Stainless steels for general purposes - Part 2: Corrosion‑resistant semi‑finished products, bars, rods and sections" - defines the technical delivery conditions for the most important corrosion‑resistant stainless steel grades in semi‑finished forms. It applies to semi‑finished products, hot‑formed bars, rods and sections for general (non‑specialized) uses, and complements the general delivery requirements of ISO 404.

This standard is essential when specifying, ordering, supplying or inspecting corrosion‑resistant stainless steel semi‑finished products to ensure consistent quality, traceability and fit for purpose.

Key topics and requirements

• Scope and product forms: Covers semi‑finished products, hot formed bars, rods and sections made of corrosion‑resistant stainless steels (≥10.5% Cr).
• Designation and numbering: Steel names follow ISO/TS 4949; steel numbers follow ISO 15510.
• Information to be supplied by purchaser: Purchaser must specify quantity, product form, dimensional standard (see Annex C), steel name/number, ISO 16143‑2 reference, required heat‑treatment symbol, process route, and inspection document type (ISO 10474).
• Classification of grades: Organized by microstructure - austenitic, austenitic‑ferritic (duplex), ferritic, martensitic, and precipitation‑hardening steels.
• Manufacturing and delivery condition: Process routes and delivery conditions are defined (see Table 4 and Tables 5–9 for treatment variants).
• Chemical composition: Cast analysis limits and permissible deviations for product analysis are specified (Tables referenced).
• Corrosion performance: Requirements and guidance on susceptibility to intergranular corrosion - referencing ISO 3651‑2 for test methods.
• Mechanical properties: Minimum mechanical properties at room and elevated temperatures are given for specified heat‑treatment conditions (Tables 5–9 and 10–14).
• Surface quality and internal soundness: Surface finish classes (Table 4), permissible discontinuity depths (Table 1), and options for internal soundness verification.
• Inspection, testing and documentation: Inspection procedures, test methods and inspection certificates are covered, with reference to ISO 10474.
• Annexes: Annex A - fabrication/heat‑treatment guidelines; Annex B - cross‑references to ASTM/EN/JIS/GB designations; Annex C - applicable dimensional standards.

Practical applications and users

Who uses ISO 16143‑2:

• Manufacturers and mill producers specifying process routes and delivery conditions.
• Procurement and quality engineers writing purchase orders and inspection criteria.
• Fabricators and product designers selecting semi‑finished stainless steel forms for general applications.
• Inspection and testing laboratories applying agreed test methods and issuing inspection certificates.

Typical uses:

• Specifying bars, rods and sections for structural, mechanical and general corrosion‑resistant components.
• Ensuring consistent chemical and mechanical properties, surface condition, and traceability for supply chains.
• Cross‑referencing international equivalents via Annex B when substituting grades.

Related standards

• ISO 16143 (Part 1: flat products; Part 3: wire)
• ISO 404 (general technical delivery requirements)
• ISO 10474 (inspection documents)
• ISO 15510 (stainless steel chemical composition)
• ISO 3651‑2 (intergranular corrosion testing)
• ISO 9443 / ISO 20723 (surface condition and delivery requirements)
• ISO/TS 4949 (steel naming)

Keywords: ISO 16143‑2, stainless steel standards, corrosion‑resistant semi‑finished products, bars rods sections, technical delivery conditions, mechanical properties, chemical composition, inspection certificate.