Q: What are the common specifications of Q235 steel?
A: It covers plates (thickness 1~200mm), profiles (angle steel, channel steel, I-beams), pipes (seamless pipes, welded pipes), and bars (diameter 6~300mm), etc.
Q: What elements are the key elements to check in the chemical composition testing of Q235?
A: The key elements to check are carbon (C), silicon (Si), manganese (Mn), sulfur (S), and phosphorus (P). Sulfur and phosphorus content are key indicators for distinguishing quality grades.
Q: What are the mechanical property testing items for Q235?
A: The routine testing items are yield strength, tensile strength, elongation, and cold bending test. Grades B/C/D also require impact testing.
Q: How to identify genuine Q235 steel?
A: Chemical composition can be tested through spectral analysis, mechanical properties can be tested through tensile testing, or the grade markings and quality certificate on the steel surface can be checked.
Q: What does the quality certificate for Q235 steel contain?
A: Includes information such as brand, specifications, delivery status, chemical composition, mechanical properties, applicable standards, production batch number, and production date.