焊丝 焊剂 Ⅰ Q235A 20(管) J422 H08A HJ431 H08MnSi H08A Ⅰ Q235B、Q245R 20(管)、 20(锻) J427 H08A HJ431 H08MnSi H08A Ⅱ 16Mn(锻) Q345R J507 H10MnSi HJ431 H08Mn2SiA H10MnSi Ⅳ 15CrMo(锻) 15CrMo(管) 15CrMoR R307 H13CrMoA HJ350 H13CrMoA 焊前预热 焊后热处理 Ⅴ 1Cr5Mo R507 焊前预热 焊后热处理 Ⅶ 0Cr18Ni9 A102 H0Cr21Ni10 HJ260 H0Cr21Ni10 Ⅶ 0Cr25N20 A402 H1Cr26Ni21 Ⅰ+Ⅱ 20+16MnR J427 H08A HJ431 H10MnSi Ⅰ+Ⅳ 20+15CrMoR J427 H08A HJ431 H10MnSi