What are the main chemical components (%) of Q195?
C≤0.12, Mn≤0.50, Si≤0.30, P≤0.035, S≤0.040, with the remainder being Fe.
Why is the carbon content of Q195 controlled to ≤0.12%?
Low carbon content ensures excellent plasticity, cold workability, and weldability, avoiding weld cracks and excessive work hardening.
What are the upper limits for sulfur and phosphorus impurities in Q195?
P≤0.035%, S≤0.040%. Low impurities improve toughness and processing stability.
Does Q195 contain alloying elements?
No, it does not contain any intentionally added alloying elements. It is ordinary carbon steel with low cost.
How does the chemical composition fluctuation of Q195 affect its performance?
High carbon content increases strength but reduces plasticity; excessive sulfur and phosphorus content easily leads to cold bending cracks and welding defects.