Welding process between NM400 and S30408
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Could someone provide information on the welding process between NM400 and S30408? Welding rod grade used for manual welding.
NM400 is a wear-resistant steel, while S30408 is stainless steel. Due to the significant differences in physical properties and chemical composition between these two materials, special measures must be taken during welding. It is recommended to use the following welding processes: 1. Choose electrodes that are certified for both carbon steel and stainless steel, such as A102, A302, etc. 2. The welding area must be cleaned before welding to remove oil and rust. 3. Use a lower current to reduce heat input and prevent cracks from forming in the weld area. 4. Appropriate heat treatment, such as tempering or stress relief, should be carried out after welding. These suggestions are for reference only; necessary process evaluation tests should be conducted prior to welding to determine the final welding parameters. .
Okay, thank you. I also plan to use A302 welding rod ； The welding area must be cleaned before welding; the heat input during welding should be less than 20 KJ/cm, and slow cooling is required after welding.
Thank you. I also plan to use A302, clean the welding area before welding, keep the heat input below 20 KJ, and perform slow cooling after welding.
Using A302 welding rod, paying attention to cleaning the welding area, controlling low heat input, and allowing slow cooling after welding are good options. Low heat input helps reduce welding stress and deformation, while avoiding a deterioration in material properties. The slow cooling process after welding can help relieve welding stresses and reduce the risk of cracks. Be sure to test and verify the entire process before implementation to ensure welding quality. .