S235JR mild steel sheet is mainly made of carbon steel and low-alloy steel. S235JR mild steel sheet is a kind of shipbuilding steel plate under EN standard. It belongs to high strength sheet. The S235JR mild steel sheet is equivalent to DIN: st37-2, JIS:S5400, ASTM:A283C, UNI:FE360B.
The weldability of S235JR mild steel sheet is affected by carbon content, carbon equivalent CEV, product size and shape, manufacturing and service conditions, etc.
Since S235JR mild steel sheet is a low carbon steel with a carbon content C< 0.35%, and of maximum Carbon Equivalent Value permitted of 0.35% which allows no special treatment before or after welding (CEV < 0.45%), S235JR mild steel sheet is considered to have excellent weldability. However, S235JR mild steel sheet killed steels are preferable to rimmed steels particularly if segregation zones could be encountered during welding (AWS D1.1-96, 1996).
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