What is X70 Steel?
Steel name: X70
Diagram No.: 532
Type of diagram: CCT
Chemical composition in weight %: 0.04% C, 0.30% Si, 1.50% Mn, 0.01% Ni,
0.02% Cr, 0.01% Mo, 0.041% V, 0.035% Al, 0.012% Ti, 0.035% Nb.
Note: Calculated welding CCT diagram. Austenitizing temperature: 1623 K.
X70 steel plate/pipes, API 5L X70 steel plate/pipes, under API 5L standard, we can regard X70 steel plate/pipes as large diameter pipes.X70 steel plate/pipes is one mainly of Steel for large diameter pipes,API-X70 steel with the demands in mechanical properties of the pipes followed the API specification for grade X70 (YS is 485MPa, TS is from 600-750 MPa).It is well known that a low carbon bainitic microstructure offers an excellent combination of strength and toughness.
| EN10208-2 Material#1.8977 | Comparison of steel grades |
| EU 113 | - |
| NBN629 | - |
| DIN 17172 | StE 480.7TM |
| API5L | X 70 |
L485MB steel plate Chemical composition -% by< mass*
| Grades | Material number | C max | Si max | Mn. mix | P max | S max |
| L485MB | 1.8977 | 0.04-0.16 | 0.55 | 1.10-1.70 | 0.035 | 0.035 |
L485MB steel sheet Mechanical properties
| Grade L485MB | Permissible yield point ratio | Yield Strength MPa(min) | Tensile Strengt MPa | Elongation % (min) |
| ≤ 0.85 | 480 | 600 - 750 | - |
