压力容器用碳锰钢SPV235 SPV315 SPV355 SPV410 SPV450 SPV490 锅炉和压力容器用碳素钢SGV410 SGV450 SGV480 SB410 SB450 SB480 SB450M SB480M 锅炉和压力容器用合金钢SBV1A SBV1B SBV2 SBV3 SQV1A SQV1B SQV2A SQV2B