| 摘要 |
An alloy steel, for automobile bumper tubes, sheets and profiles, has the composition (by wt.) 0.17-0.20% C, 1.70-2.20% Mn, 0.45-0.75% Cr, 0.10-0.35% Mo, 0.03-0.05% Al, 0.001-0.05% Ti, 0.01-0.12% V, 0.025-0.06% Nb, 0.0001-0.10% Zr, 0.002-0.003% B, 0.01-0.04% N, NOTGREATER 0.15% Si, NOTGREATER 0.025% P, NOTGREATER 0.010% S, balance Fe and impurities, the sum of Ti, V and Nb being 0.16-0.25%. Also claimed is an automobile bumper made of the above alloy steel. |
