| Element |
Grade 1 |
| Carbon, max |
0.30 |
| Manganese |
0.40 – 1.06 |
| Phosphorous, max |
0.025 |
| Sulfur, max |
0.025 |
| Silicon |
– |
| Nickel |
– |
| Grade | Yield Strength (Mpa) | Tensile Strength (Mpa) | Elongation (%) |
| Grade.1 | ≥205 | ≥380 | 35 |
| Grade | The lowest temperature for strike test | ||||||||
| ℉ | ℃ | ||||||||
| Gr.1 | -50 | -45 | |||||||
|
Wall Thickness |
Grade 1 |
||
|
in. |
mm |
Longitudinal |
Transverse |
|
5/16 (0.312) |
8 |
35 |
25 |
|
9/32 (.281) |
7.2 |
33 |
24 |
|
1/4 (.250) |
6.4 |
32 |
23 |
|
7/32 (.219) |
5.6 |
30 |
|
|
3/16 (.188) |
4.8 |
28 |
|
|
5/32 (.156) |
4 |
26 |
|
|
1/8 (.125) |
3.2 |
25 |
|
|
3/32 (.094) |
2.4 |
23 |
|
|
1/16 (.063) |
1.6 |
21 |
|
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