ISO 6932:2014

Overview

ISO 6932:2014 specifies requirements for cold‑reduced carbon steel strip with a maximum carbon mass fraction of 0.25%, furnished to closer tolerances than sheet and intended for coils and cut lengths. The standard covers dimensions (commonly ≤ 6 mm thickness, widths up to 600 mm), chemical composition, tempers and mechanical quality designations, surface finish, edges, tolerances, testing and inspection, marking, and purchaser information.

Key topics and technical requirements

• Chemical composition
  • General carbon limits: up to 0.25% for products specified to temper (hardness) and typically ≤ 0.15% for products specified to mechanical properties.
  • Other element limits include manganese (≤ 0.60%), phosphorus and sulfur with low maximums, and controlled amounts of Cu, Ni, Cr, Mo, Nb, V, Ti (see standard for exact heat/product limits and sums).
• Tempers and hardness
  • Tempers No. 1–5 (No.1 hard → No.5 dead soft) with specified hardness ranges. Hardness measurement methods referenced to ISO 6507‑1 (Vickers) and ISO 6508‑1 (Rockwell).
• Mechanical properties
  • Commercial/drawing quality designations CR21–CR24 (CR21 commercial → CR24 deep drawing aluminium‑killed) with tensile, yield and elongation requirements for specified delivery conditions (cold‑reduced, annealed, skin‑passed).
• Dimensions, tolerances and shape
  • Closer tolerances than sheet; includes thickness, width, flatness and coil size limits. Sampling and acceptance procedures are defined.
• Manufacture & testing
  • Steelmaking and processing methods are left to the producer unless otherwise agreed. Normative test methods include tensile testing per ISO 6892‑1, plus hardness and retest procedures, sampling rules and product analysis tolerances.
• Surface, edges and workmanship
  • Requirements for surface finish, edge condition, oiling and coil marking are specified to support forming, stamping and finishing operations.

Applications and users

ISO 6932:2014 is intended for organizations that produce, procure, inspect or use cold‑reduced steel strip, including:

• Steel producers and strip mills
• Coil processors and slitting lines
• Automotive and appliance manufacturers (stampings, formed parts)
• Metal fabricators, stampers and deep‑drawing operations
• Procurement, quality and inspection engineers specifying strip for manufacturing

Practical benefits include consistent supply of strip with controlled hardness or mechanical behavior, improved forming performance, and clearer procurement and inspection criteria.

Related standards

• ISO 6507‑1 (Vickers hardness test)
• ISO 6508‑1 (Rockwell hardness test)
• ISO 6892‑1 (Tensile testing)
• ISO 3574 (cold‑reduced sheet slit from wider widths) - referenced as not applicable to narrow slitted strip
• ISO 4960 (strip with carbon > 0.25%) - for higher‑carbon products

Keywords: ISO 6932:2014, cold-reduced carbon steel strip, temper, mechanical properties, hardness, chemical composition, strip tolerances, coil size, surface finish.