ISO 6361-4:2014

Overview

ISO 6361-4:2014 - "Wrought aluminium and aluminium alloys - Sheets and plates: Tolerances on shape and dimensions" - defines dimensional and shape tolerances for hot-rolled and cold-rolled aluminium sheet and plate for general engineering applications. The standard applies to products with a thickness > 0.15 mm and ≤ 203 mm, and excludes reroll stock (coiled semi‑finished products) and special forms (corrugated, embossed). Technical conditions for inspection and delivery are specified in ISO 6361‑1.

Key topics and technical requirements

• Thickness tolerances: Detailed tabulated tolerances for cold-rolled and hot-rolled products (see Tables 1–4). Values depend on alloy group, specified thickness and width. Note: when a tolerance is given as an "all plus" or "all minus" side, the numerical value is doubled.
• Width tolerances: Separate limits for sheared and sawed sheet/plate (Tables 5–6). Width is measured at room temperature during cutting.
• Length tolerances: Separate limits for sheared and sawed sheet/plate (Tables 7–8). Length is measured at room temperature during cutting.
• Shape tolerances: Requirements for lateral curvature, flatness and squareness are provided (Section 4), including flatness tolerances and permissible lateral curvature.
• Temperature correction: Measurement dimensional allowance of 0.23 mm per 1 000 mm for a 10 °C deviation from the reference temperature (20 °C).
• Scope limits: Tolerances outside the published ranges (thickness/width) must be agreed between purchaser and supplier.
• Application note: Hot‑rolled tables reference products in temper grade H112 and those finished in hot‑rolled condition.

Practical applications

• Use ISO 6361-4 to specify acceptance criteria in purchase orders and technical drawings for aluminium sheets and plates.
• Apply the tolerances in quality control, incoming inspection, and vendor qualification to ensure parts meet dimensional and flatness requirements.
• Support manufacturing process control (rolling, cutting, sawing) and downstream operations (forming, machining, assembly) by providing consistent dimensional baselines.
• Relevant in industries such as aerospace, automotive, marine, building and construction, and general engineering where predictable dimensional performance of aluminium sheet/plate is required.

Who uses this standard

• Aluminium mill producers and processors
• Purchasing and procurement teams specifying material
• Quality inspectors and metrology labs
• Design and mechanical engineers specifying tolerances
• Fabricators, stampers and finishers who require consistent feedstock

Related standards

• ISO 6361-1 - Technical conditions for inspection and delivery
• ISO 6361-2 - Mechanical properties
• ISO 6361-3 - Strips: Tolerances on shape and dimensions
• ISO 6361-5 - Chemical composition

Keywords: ISO 6361-4:2014, tolerances on shape and dimensions, wrought aluminium, aluminium alloys, sheets and plates, thickness tolerances, width tolerances, flatness, squareness, hot-rolled, cold-rolled.