| 摘要 |
<p>A low-carbon, low-phosphorus steel material which consists of 0.001 to 0.025 wt.% carbon, up to 0.60 wt.% silicon, 0.10 to 3.00 wt.% manganese, 0.005 to 0.030 wt.% phosphorus, up to 0.01 wt.% sulfur, up to 0.10 wt.% aluminum, 0.1 to 1.5 wt.% copper, 0.1 to 6.0 wt.% nickel, 0.0001 to 0.0050 wt.% boron, and iron and unavoidable impurities as the remainder. The steel material forms a stable amorphous rust on its surface in an early stage to thereby combine excellent weatherability, which is required for use in a salty atmosphere as in coastal regions, with weldability and toughness.</p> |
