| 摘要 |
<p>A steel material which has been rid of surface scale and which contains Si: 0.08 to 0.20%, Al: more than 0.03% to 0.08%, and one or more of P, Ti and V and satisfies the relationships:[Al/Si<=0.45]and[262×(Al/Si)+197×(P/Si)+225×(Ti/Si) +50×(V/Si)>123]wherein each symbol of element represents the content of the element. The steel material permits high-speed stable thermal cutting and is usable as the material for laser beam cutting, plasma arc cutting, and gas cutting. The steel material may have an inorganic zinc primer coat on the surface.</p> |
