a514 welded structure with high yield strength. quenched and tempered alloy steel-k8凯发官网
a514 welded structure with high yield strength. quenched and tempered alloy steel
1 main use
this type of product is a high yield strength steel plate with a yield strength of over 690 mpa and good weldability. suitable for construction machinery, large electric excavators, bulldozers, dump trucks, oil and gas pipelines, drilling platforms, drilling machinery, quarrying machines (hydraulic supports and dozers, etc.), welded bridges and other steel structures.
2 grades and standards
grade: grade a ~ t; executive standard: a514/a514m
3 technical conditions of supply
3.1 product specifications:
6~200mm×2200~3800mm×6000~12000mm
3.2 chemical composition
table 1 chemical composition, %
牌号 | c | si | mn | p | s | cr, ni, b, etc. |
gradea | 0.15-0.21 | 0.40-0.80 | 0.80-1.10 | ≤0.035 | ≤0.035 | 适量 |
gradec | 0.10-0.20 | 0.15-0.30 | 1.10-1.50 | ≤0.035 | ≤0.035 | |
gradet | 0.08-0.14 | 0.40-0.60 | 1.20-1.50 | ≤0.035 | ≤0.035 |
3.3 机械性能
表2 机械性能
steel 牌号 | 厚度 mm | 屈服强度 σs, mpa | 抗拉强度 σb, mpa | 延伸率 δ50, % | 断面收缩率 ψ，% | 布氏硬度 |
grade a ～t | 6~20 | ≥690 | 760~895 | ≥18 | ≥40（板状试样） | 235-295（≤10 mm厚度 ） |
＞20-65 | ≥690 | 760~895 | ≥18 | ≥40（板状试样） | ||
＞65-100 | ≥620 | 690~895 | ≥16 | ≥50（圆棒试样） |