Overview
EN ISO 9444-2:2010 / ISO 9444-2:2009 specifies tolerances on dimensions and form for continuously hot‑rolled stainless steel wide strip and sheet/plate. It applies to actual strip widths from 600 mm to 2 500 mm and to sheets/plates cut from such strip. The standard defines delivery conditions, purchaser information requirements, dimensional tolerances, form tolerances and the methods for measuring thickness, width, length, edge camber, squareness and flatness.
Key Topics
- Scope and delivery
- Covers continuously hot‑rolled stainless steel wide strip (600–2 500 mm) and sheet/plate cut from that strip.
- Default delivery condition is as‑rolled (U); annealed/descaled or trimmed edges require agreement.
- Purchaser responsibilities
- Orders should specify: type of delivery, standard number (ISO 9444-2), thickness, width, edge condition (mill M or trimmed T), ends (rolled R or cropped C), length and any special delivery conditions.
- Tolerances on thickness
- Tolerances vary by specified thickness and nominal width (two width bands: ≤ 1 400 mm and > 1 400 mm to 2 500 mm).
- Example: for specified thickness up to 2.0 mm tolerances are approximately ±0.22 mm (≤ 1 400 mm) and ±0.27 mm (> 1 400 mm).
- Within‑coil thickness variation for cold‑rolling feedstock
- Permitted thickness differences are given by thickness and width categories (example figures: 0.20–0.40 mm depending on thickness and width).
- Form tolerances and measurements
- Includes tolerances and measurement procedures for width, length, edge camber, squareness and flatness (measurement clauses are specified: 14–19).
- Coil and sheet form
- Guidance on coil form, ordered formats and how mill ends are treated with respect to tolerances.
Applications
- Used by stainless steel mills, supply chain purchasers, quality control/inspection teams, and fabricators who need defined dimensional and form tolerances for production, procurement and acceptance testing.
- Relevant to industries using wide stainless strip and plate: construction, HVAC, food processing equipment, chemical and petrochemical plants, and general metal fabrication where consistent flatness, thickness and edge condition are critical.
- Helps ensure interchangeability, quality assurance, and clear contractual specifications when ordering hot‑rolled stainless steel wide strip and cut sheets.
Related Standards
- ISO 9444-1 (narrow strip and cut lengths) - complements Part 2 by covering narrow widths and cut lengths.
- ISO 6929 - definitions and classification referenced for terms and product types.
Keywords: EN ISO 9444-2, ISO 9444-2, continuously hot‑rolled stainless steel, tolerances on dimensions and form, wide strip, sheet/plate, thickness tolerances, flatness tolerances, measurement methods.
