316 Stainless Steel Plate Thickness Tolerance Standard

📘 316 Stainless Steel Plate Thickness Tolerance Standard

316 stainless steel plates are widely used in industrial, marine, and chemical applications due to their excellent corrosion resistance. To ensure precision during fabrication and consistent quality in bulk procurement, understanding the thickness tolerance standards is essential.

✅ 316 Stainless Steel Plate Applicable Standards

Standard	Description
ASTM A480 / A480M	General specification for flat-rolled stainless and heat-resisting steel plate, sheet, and strip
EN ISO 9445-2	Tolerances on dimensions and shape for cold-rolled narrow and wide stainless steel strip and sheet
JIS G4304 / G4305	Japanese standards for hot/cold-rolled stainless steel plate/sheet

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📏 Thickness Tolerances for 316 Stainless Steel Plate (ASTM A480 - Hot Rolled, Mill Edge)

Nominal Thickness (mm)	Tolerance (mm)
3.0 – <4.0	±0.30
4.0 – <5.0	±0.35
5.0 – <6.0	±0.40
6.0 – <8.0	±0.45
8.0 – <10.0	±0.50
10.0 – <12.5	±0.60
12.5 – <15.0	±0.75
15.0 – <25.0	±0.90

🔍 Note: Tighter tolerances are available for precision applications upon request (e.g., for polished or cut-to-size plates).

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📌 Factors Affecting Thickness Tolerance

Manufacturing process: Cold-rolled plates have tighter tolerances than hot-rolled plates.

Plate width and flatness: Wider plates may have slightly larger thickness variation.

Surface finish requirements: Precision-polished or 2B-finished plates often require stricter control.

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🧾 Buyer Tips

Always request mill test certificates (MTC) confirming dimensional tolerance compliance.

For laser cutting, bending, or pressure vessel applications, specify required tolerances in the purchase order (e.g., ASTM A480 Class 1 or EN 10029).

Confirm tolerance class when ordering from international suppliers to avoid mismatches (e.g., EN class A vs class C).