标准 |
牌号 |
抗拉强度(MPa) |
屈服强度(MPa) |
伸长率(%) |
硬度 |
API SPEC 5CT |
J55 |
≥517 |
379~552 |
0.5% |
|
K55 |
≥655 |
379~552 |
0.5% |
||
N80 |
≥689 |
552~758 |
0.5% |
||
L80(13Cr) |
≥655 |
552~655 |
0.5% |
≤241HB |
|
P110 |
≥862 |
758~965 |
0.6% |