Mild steel pipes and is one of the low carbon steel pipes with low carbon content and the lesser hardness. Plus a small amount of pearlite microstructure of ferrite is characterized by low hardness (HB 100-130), low intensity (σb 372 ~ 470MPa) and high plasticity (δ 24 percent to 36 percent), and formability and good weldability.
Structural steel pipe is one kind of mild steel pipe,including many hollow section.
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