|
chemical composition( %) |
carbon |
manganese |
Phosphorus ≤ |
Sulfur ≤ |
|
0.06 ~ 0.18 |
0.27 ~ 0.63 |
0.035 |
0.035 |
|
Mechanical behavior |
Tensile strength (Mpa) |
Yield strength (Mpa) |
Elongation (%) |
hardness |
|
≧ 325 |
≧ 180 |
≧ 35 |
≤72HRB |
|
OD and wall thickness tolerances |
|||||
|
OD Inch (mm) |
+ |
– |
Wall thickness Inch (mm) |
+ |
– |
|
<1 (25.4) |
0.10 |
0.10 |
≦ 1 1/2 (38.1) |
20% |
0 |
|
1 ~ 1 1/2 (25.4 ~ 38.1) |
0.15 |
0.15 |
> 1 1/2 (38.1) |
twenty two% |
0 |
|
1 1/2 ~ 2 (38.1 ~ 50.8) |
0.20 |
0.20 |
|||
|
2 ~ 2 1/2 (50.8 ~ 63.5) |
0.25 |
0.25 |
|||
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