1、不不预预热热可可焊焊最最大大组组合合厚厚度度Maxinmum combined thickness weldable without preheatPreheating temperature calculated in accordance with EN 1011-2.1. CE=C+Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15 CET= C+(Mn+Mo)/10 + (Cr+Cu)/20 +Ni/40 MaterialStandardCMnSiMoCrCuNiVTiCETCEQ235BGB 700-20060.21.40.3500.30.30.3000.380.53Q3
2、45BGBT1591-20080.21.70.50.10.30.30.50.150.20.420.64QStE420TMQ/BQB 310-20090.121.50.500000.20.150.270.41QStE500TMQ/BQB 310-20090.121.70.500000.20.150.290.442. Solid wires for gas-shielded arc welding may be used with scale Dunless speccifically assessed and shown to meet scale E.3. 查看下图中预热温度标线和左边坐标所示热输入量和组合厚度可以得到预热温度MaterialStandardCEMaxinmum combined thickness weldable without preheat (Heat input 2.0KJ/mm)Q235BGB 700-20060.5365 mmQ345BGBT1591-20080.6438 mm
