| 摘要 |
A steel alloy for pipes, sheet metal or sections for manufacturing bumpers for motor vehicles, wherein the steel alloy contains, in percent by weight, 0.17 to 0.20% carbon, 1.70 to 2.20% manganese, 0.45 to 0.75% chromium, 0.10 to 0.35% molybdenum, 0.03 to 0.05% aluminum, 0.01 to 0.05% titanium, 0.01 to 0.12% vanadium, 0.025 to 0.06% niobium, 0.0001 to 0.10% zirconium, 0.002 to 0.003% Boron, 0.01 to 0.04% nitrogen, up to 0.15% silicon and up to 0.025% phosphorus and up to 0.010% sulfur, wherein the remainder is iron including impurities caused from smelting, and wherein the sum of the alloy components titanium, vanadium and niobium is between 0.16 and 0.25%.
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