Determination of preheating temperature and heat treatment temperature before welding

Keywords:preheating, heat treatment
The preheating temperature of ordinary carbon steel and low alloy steel is determined according to the range of carbon equivalent before welding.

the range of carbon equivalent %            preheating temperature 

CE<0.45                                                          Not preheat 

0.45≤CE<0.6                                                   100 - 200

CE≥0.6                                                              200 - 370


Commonly used steel after welding stress relief heat treatment temperature.

Material     Carbon steel&medium and low alloy steel   Austenitic steel   Aluminum alloy   Magnesium alloy   Titanium alloy   Cast iron

℃                                     580 - 680                               850 - 1050           250 - 300               250 - 300              350 - 600      600 - 650


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