Thickness Tolerances for Sheet And Plate

Thickness

Width Of Plate

Up to 1250mm

1250mm-1600mm

1600mm-2000mm

2.5mm-4mm

+/-0.28mm

+/-0.28mm

+/-0.32mm

4mm-5mm

+/-0.30mm

+/-0.30mm

+/-0.35mm

5mm-6mm

+/-0.32mm

+/-0.32mm

+/-0.40mm

6mm-8mm

+/-0.35mm

+/-0.40mm

+/-0.40mm

8mm-10mm

+/-0.45mm

+/-0.50mm

+/-0.50mm

10mm-15mm

+/-0.50mm

+/-0.60mm

+/-0.65mm

15mm-20mm

+/-0.60mm

+/-0.70mm

+/-0.75mm

20mm-30mm

+/-0.65mm

+/-0.75mm

+/-0.85mm

30mm-40mm

+/-0.75mm

+/-0.85mm

+/-1.00mm

40mm-50mm

+/-0.90mm

+/-1.00mm

+/-1.10mm

50mm-60mm

+/-1.10mm

+/-1.20mm

+/-1.40mm

60mm-80mm

+/-1.40mm

+/-1.50mm

+/-1.70mm

80mm-100mm

+/-1.70mm

+/-1.80mm

+/-1.90mm

100mm-150mm

+/-2.20mm

+/-2.20mm

+/-2.70mm

150mm-200mm

+/-2.80mm

+/-2.80mm

+/-3.30mm

Flatness Tolerances for Sheet & Plate

Thickness

Deviation allowed as a % of;

Partial Deviation

% (Chord of at least 300mm)

Length

Width

2.5mm-3.0mm

0.4%

0.5%

0.5%

3.0mm-6.0mm

0.3%

0.4%

0.35%

6.0mm-50mm

0.2%

0.4%

0.3%

50mm-200mm

0.2%

0.2%

by agreement

Diameter

Alloy 6082

Alloys 2011, 2014, 5083 & 7075

8mm-18mm

+/-0.22mm

+/-0.30mm

18mm-25mm

+/-0.25mm

+/-0.35mm

25mm-40mm

+/-0.30mm

+/-0.40mm

40mm-50mm

+/-0.35mm

+/-0.45mm

50mm-65mm

+/-0.40mm

+/-0.50mm

65mm-80mm

+/-0.45mm

+/-0.70mm

80mm-100mm

+/-0.55mm

+/-0.90mm

100mm-120mm

+/-0.65mm

+/-1.00mm

120mm-150mm

+/-0.80mm

+/-1.20mm

150mm-180mm

+/-1.00mm

+/-1.40mm

180mm-220mm

+/-1.15mm

+/-1.70mm

220mm-270mm

+/-1.30mm

+/-2.00mm

270mm-320mm

+/-1.60mm

+/-2.50mm