What are the main chemical components of Q235?
C: 0.12%-0.22%, Mn: 0.3%-0.7%, Si≤0.35%, S/P≤0.050%/0.045% (Grade A).
What are the differences in carbon content between grades?
A: 0.14-0.22%, B: 0.12-0.20%, C≤0.18%, D≤0.17%.
What are the effects of sulfur and phosphorus impurities?
Sulfur causes hot brittleness, phosphorus causes cold brittleness. The higher the grade, the lower the content. Grade D has S/P≤0.035%.
What is the effect of carbon content on weldability?
Carbon ≤0.22%, low carbon equivalent, less prone to cracking during welding, suitable for conventional arc welding/gas shielded welding.
Does Q235 contain alloying elements?
Very few, it is a carbon steel, with basic properties guaranteed by carbon and manganese.