Grade

Condition

Manufacturing Method

OD

Wall  Thickness

Long

Standard

Gr1

Gr2

Annealed

Cold rolling

Seamless

10-15MM

0.5-4.5 MM

500-4000MM

ASTM B337

ASTM B338

＞15-20MM

0.6-2.5 MM

500-9000MM

＞20-30MM

0.6-2.5 MM

＞30-40MM

1.0-2.5 MM

＞40-50MM

1.5-3.0 MM

＞50-60MM

1.5-3.5 MM

＞60-80MM

2.0-4.5 MM

Welded

16MM

0.5-1.0 MM

500-15000MM

19MM

0.5-1.25MM

25  27MM

0.5-1.5 MM

500-6000MM

31  32  33MM

0.8-2.0 MM

38MM

1.5-2.5 MM

500-4000MM

50MM

2.0-2.5 MM

63MM

2.0-2.5 MM

Welded

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Rolling

6-10MM

0.5-1.25 MM

500-8000MM

＞10-15MM

0.5-1.5 MM

＞15-20MM

0.5-2.0MM

500-5000MM

＞20-25MM

0.5-2.0 MM

＞25-30MM

0.5-2.0MM