特种焊接用钢 Special steel wire rod forwelding | Q70 Q80 ATL700-Ti ER70S-G ER55-B2 BSREF1 SJA73 H08CrMoVTiRE AB14-SJ SA335P91 | Ф5.5~6.5 | 技术协议 Technical protocol | 主要用于工程机械、压力容器、锅炉及化工设备等部件的焊接。 Mainly used for welding parts of construction machinery, pressure vessel, boiler and chemical equipment. |