API 5L X80 steel plate/pipes is one mainly of Steel for large diameter pipes. API 5L X80 steel plate/pipes with good low temperature toughness was developed and the buckling behavior ofAPI 5L X80 steel plate/pipeswas investigated through large scale deformation tester. X80 is a grade of steel for large diameter pipes under America. The minimum tensile strength is 551 MPa.
X80 API5L Material#1.8978 | Comparison of steel grades | |
EN10208-2 | L555MB |
Chemical analysis -% by mass*
Grades | Material number |
C max | Si max | Mn. max | P max | S max | AL min | Mo max | Ni max | Nb max |
X80 | 1.8978 | 0.08 | 0.26 | 1.75 | 0.011 | 0.0005 | 0.03 | 0.27 | 0.22 | 0.070 |
Grade | Permissible yield point ratio |
Yield Strength MPa(min) |
Tensile Strength MPa |
Elongation % (min) |
X80 | ≤ 0.90 | 555 | 625 - 700 | 20 |
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