ASTM A135 ERW welded steel pipe grade A/B
ASTM A135/A135M, Standard Specification for Electric-Resistance-Welded Steel Pipe. It covers two grades of electric resistance welded steel pipe: Grade A and Grade B, Grade A is adapted for flanging and bending and is suitable for welding.
Grades: A /B
W.T: 2.11-3.4mm
O.D: 21.43-166.6mm
Similar standards: ASTM A53
Application:The pipe is intended for conveying gas,vapor,water or other liquid, especially suit for fire sprinkler pipe.
A135 chemical composition:
|
Grades |
Carbon max |
Manganese |
Phosphorous |
Sulfur |
|
A |
0.25 |
0.95 |
0.035 |
0.035 |
|
B |
0.30 |
1.20 |
0.035 |
0.035 |
A135 tubing Mechanical Properties:
|
Grades |
Yield Strength min,ksi(MPa) |
Tensile Strength min, ksi(MPa)) |
Elongation % |
|
Grade A |
30 |
48 |
35 |
|
Grade B |
35 |
60 |
30 |
ASTM A135 pipe tolerance:
Thickness: the minimum wall thickness at any point shall be more than 12.5%under specified wall thickness.
Diameter: the outside diameter shall not vary more than +-1%from norminal size specified.
Weight: the weight of the pipe shall not more than +-10%of the specified weight.
ASTM A135 pipe Heat treatment:
Weld seam of ERW A 135 pipe grade B shall be heat treated after welding to a minimum tempreture of 540℃, so that no untempered Martensite remains.
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