Standard | Steel grade | Chemical composition (%) | Mechanical behavior | Elongation (%) | ||||
C | Mn | Si | PS | Tensile strength (MPa) | Yield strength (MPa) | |||
ASTMA192 | A192 | 0.06 ~ 0.18 | 0.27 to 0.63 | ≤ 0.25 | ≤ 0.035 | ≥ 325 | ≥ 180 | ≥ 35 |
Hardness requirements:
Brinell hardness | Rockwell hardness |
S ≥ 5.1mm | S < 5.1mm |
≤ 137 HB | ≤ 77 HRB |
Tolerance:
Type of pipe | Diameter ( D ) | Thickness ( S ) | ||
Outside Diameter (mm ) | Tolerance (mm ) | Outside Diameter (mm ) | Tolerance (mm ) | |
Hot-rolled tubes | ≤ 101.6 | +0.4 ~ -0.8 | 76 ~ 168.3 | +28% ~ 0 |
> 101.6 ~ 168.3 | +0.4 ~ -1.2 | |||
Cold drawn tubes | < 25.4 | + 0.10 | ≤ 38.1 | +20% ~ 0 |
25.4 ~ 38.1 | + 0.15 | |||
> 38.1 - < 50.8 | + .20 | > 38.1 | +22% ~ 0 |