| 摘要 |
<p>Steel suitable for cold-shaping is prepared by melting and refining and contains by weight 0.80-1.50% carbon, 6.25-9% chromium, 1.80-3% molybdenum, 0.20-0.40% vanadium, 0.60-1.50% niobium, 500-1500 ppm of titanium or zirconium and up to the following levels of other ingredients: 1% manganese, 1% silicon, 0.030% phosphorous, 0.005% sulphur, 0.50% nickel, 0.15% aluminium, 150 ppm nitrogen and 50 ppm oxygen, the balance being iron and impurities.</p> |
