What are the main chemical components (%) of Q195?
A: C≤0.12, Si≤0.30, Mn≤0.50, P≤0.035, S≤0.040; residual Cr, Ni, Cu≤0.30.
What is the effect of carbon content on Q195?
A: Low carbon (≤0.12%) ensures high plasticity, easy welding, and good cold workability, but lower strength.
What are the control requirements for sulfur and phosphorus impurities?
A: S≤0.040% (to prevent hot brittleness), P≤0.035% (to prevent cold brittleness), both are strictly controlled harmful elements.
What is the role of manganese in Q195?
A: As a major strengthening element, a small amount of manganese (≤0.50%) increases strength without significantly reducing plasticity.
Does Q195 contain alloying elements?
A: It does not contain intentionally added alloying elements; it is a carbon structural steel and contains only a small amount of residual alloying elements.