A573 Grade 70 steel vsA516 Grade 70 steel plate equivalent ASTM steel grade

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Pipeline steel plate API 5L Gr.B, A573 Grade 70 steel vsA516 Grade 70 steel plate, X42, X46, X52, X56, X60, X65, X70, X80 is a key steel material for manufacturing straight-seam submerged arc welded pipe for high-pressure long-distance natural gas pipeline. X80 pipeline steel is currently the highest-grade pipeline steel in engineering application in the world. The our company produced X80 pipeline steel plates are successfully used in natural gas pipeline project with the largest wall thickness and diameter.

NM400 alloy steel plate is a kind of wear-resistant steel plate. NM—The first letter of the Chinese pinyin 400 of the characters “resistant” and “grind” for wear resistance is the HB value of the Brinell hardness value. NM400 alloy plate is widely used in engineering machinery, mining machinery, coal mining machinery, environmental protection machinery, metallurgical machinery and other product parts. Excavator, loader, bulldozer bucket plate, blade, side blade, blade.

For low alloy high strength steel, the addition of small amounts of V, Ti, Nb, AI and other grain refining elements not only further improves the strength, but also improves the toughness of the steel. In A573 Grade 70 steel vsA516 Grade 70 steel plate, low alloy high strength steel, rare earth element Re is sometimes added to eliminate harmful impurities in the steel, improve the shape and distribution of inclusions, and weaken its cold brittleness. A small amount of alloying elements has a significant effect on improving the mechanical properties of steel. For example, adding only 1% Mn to Q235 becomes Q345 steel, but its strength increases by nearly 40% to 345 MPa.

A514 gr.B steel coil chemical composition (melting analysis)%
C: 0.12-0.21, Si: 0.20-0.35, Mn: 0.70-1.00, P max.: 0.035, S max.: 0.035, B max.: 0.005, Cr: 0.40-0.65, Mo: 0.15-0.25, V: 0.03-0.08, Ti: 0.01-0.03
The mechanical properties in thickness (mm)T≤65
Yield strength (≥Mpa): 690
Tensile strength (Mpa):760-895
Elongation in ≥,%: 18

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