SMA490AW SMA490BW SMA490CW SMA490AP SMA490BP SMA490CP SMA570W SMA570P 日本标准性轧制钢 SPA-H SPA-C 碳素结构钢 S09CK S10C S12C S15C S17C S20C S20CK S22C S25C S28C S30C S33S S35C S38C S40C S43C S45C S48C S50C S53C S55C S58C 合金结构钢 SMn420 SMn433 SMn438 SMn443 SMnC443 SCr415 SCr420 SCr430 SCr440 SCr445 SCM415 SCM418 SCM420 SCM421 SCM425 SCM430 SCM432 SCM435 SCM440 SCM445 SCM822