| 產地\r<\/td> | 天津<\/td> | 硬度HRC\r<\/td> | 。。。<\/td><\/tr><\/table>碳鋼焊條 牌號型號GB熔敷金屬化學成分（%）（≤）熔敷金屬力學性能（≥）特點與用途CMnSiSP其余Rel/RP0.2MPaRmMPaA%AKVJJ421E43130.100.32/0.550.300.0300.035—355440/570220℃47焊接低碳鋼結構，特別適用于薄板小件及短焊縫的間斷焊和蓋面焊？扇恢煤附覶HJ421XE43130.100.32/0.550.300.0350.040—330420170℃27焊接低碳鋼及鍍鋅板，特別適用于薄板的立向下焊及間斷焊THJ421Fe18E43240.120.30/0.600.350.0350.040—330420170℃47適用于船體結構低碳鋼和其他相應等級的普通低碳鋼的平焊、平角焊THJ422E43030.100.32/0.550.250.0350.040—330420220℃27焊接較重要的低碳鋼結構和強度等級相當的低合金鋼結構，如09Mn2等？扇恢煤附覶HJ422GME43030.100.32/0.550.250.0350.040—330420220℃27適用于海上平臺船舶、車輛、工程機械等表面裝飾焊縫的焊接
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