Q235 steel coil welding: What are the commonly used welding wire/electrode types?
A: Use E43 series welding electrodes (e.g., E4303, E4315) and ER50 series welding wire (e.g., ER50-6). These offer good compatibility, low welding costs, and are the industry's standard choice.
Q235 steel coil deformation after leveling? How to avoid it?
A: Thin coils (hot-rolled ≤3mm / cold-rolled ≤1mm) are prone to warping and side bending during leveling. To avoid this, use a high-precision leveling machine and control the leveling speed. Thick coils can be leveled directly, while thin coils should be leveled after leveling.
Q235 steel coil slitting: What are the precautions?
A: Control the slitting width tolerance to ±0.1mm. Remove edge burrs after slitting to avoid scratching the surface. Oiled steel coils need to be re-oiled for rust prevention after slitting, and pickled coils should be packaged promptly after slitting.
Q235 steel coils: Can they be stamped? Which stamping methods are suitable? A: Suitable for shallow and medium drawing (such as automotive parts, appliance housings, and hardware). Cold-rolled coils have better stamping performance than hot-rolled coils. For deep drawing, due to insufficient elongation, they are generally replaced by cold-rolled low-carbon steels such as SPCC and DC01.
Can Q235 steel coils be painted, galvanized, or plastic-coated?
A: Yes, hot-rolled coils require pickling, rust removal, and phosphating before surface treatment. Cold-rolled coils can be treated directly. Treatment improves rust and corrosion resistance and expands application scenarios.