a572gr50/65 high strength low alloy niobium vanadium structural steel-k8凯发官网
a572gr50/65 high strength low alloy niobium vanadium structural steel
1 main use
6～51mm thick a572gr50 low-alloy high-strength structural steel plate is widely used in engineering structures, such as construction steel structure, construction machinery, mining machinery, trucks, bridges, pressure vessels, etc., especially for requiring good weldability. and tough structural and engineering machinery parts. gr65 is a galvanized high-strength steel widely used in power towers and export products.
2 grades and standards
grade: a572gr50; a572gr65
executive standard: astm a572/ a572m
3 technical conditions of supply
3.1 product specifications
2.5~80×1500~3800×c, lmm
3.2 chemical composition
table 1 chemical composition, %
牌号 | c | si | mn | p | s | nb |
a572gr50 | ≤0.20 | ≤0.401 | ≤1.50 | ≤0.04 | ≤0.05 | 0.005～0.05 |
a572gr65 | ≤0.26 | ≤0.40 | ≤1.35 | ≤0.04 | ≤0.05 | 0.005～0.05 |
3.3 mechanical properties
table 2 mechanical properties
牌号 | σs，mpa | σb，mpa | δ200，% | akv，j |
a572gr50 | ≥345 | ≥450 | ≥18 | ≥34 ( 0℃) |
a572gr65 | ≥450 | ≥550 | ≥15 | ≥34 (-20℃) |