(日本) 碳素结构钢:SS330 SS400 SS490 SS540 S09CK S10C S12C S15C S15CK S17C S20C S20CK S22C S25C S28C S30C S33C S35C S38C S40C S43C S45C S48C S50C S53C S55C S58C SM400A SM400B SM400C SM490A SM490B SM490C SM490YA SM490YB SM520YB SM520YC SM570 SPV315 SPV355 SPV410 SPV450 SPV490 SPV235 SGV410 SGV450 SGV480 SB410 SB450 SB480 SB450M SB480M SLA235A SLA235B SLA325A SLA325B SLA365 SLA410 STK290 STK400 STK490 STK500 STK540