Steel holds water at low temperatures. when the temperatures are below freezing, the water inside the steel freezes and makes welding very difficult. So when the steel is below 40F you should pre-heat the steel to at least 100F to expel all the moisture in the steel before welding.
If you have questions about this process or any other welding/fabrication process, let me know in the comments and I'll be happy to answer them.
Негізгі бет Ғылым және технология Can You Weld In The Winter? / Welding In Freezing Temperatures.
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