High impact toughness of weathering steel

September 11, 2023

The welding place of weathering steel requires anti-impact, moisture-proof, waterproof and rainproof, cold and other preventive measures, the selection of partial alkali and low hydrogen type welding rod, welding paste, partial alkali and low hydrogen type welding rod, welding paste butt weld has low chlorobutadiene content, flue gas denitrification, dephosphorization characteristics, and high impact toughness.

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The low geographical ambient temperature allowed for welding of weathering steel is as follows:

1, carbon steel and general ferritic stainless steel (A-Ⅰ class) : -10℃

2, carbon steel and general ferritic stainless steel, heat strength steel and carbon tool steel (A-Ⅱ, Ⅲ, B-Ⅰ class) : 0℃

3, heat strength steel and carbon tool steel (B-Ⅱ, Ⅲ class) : 5℃

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When any of the following situations occur in the geographical environment of electric welding, certain effective protective measures should be taken, otherwise, electric welding is prohibited:

1. The wind speed of manual arc welding exceeds 8 meters /s. The wind speed of manual arc laser welding exceeds 1 m /s;

2, the relative humidity of the air exceeds 90%;

3, the weldment splash water, rain or contact with fog;

4, when the welding temperature is below 0℃.

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