How to select the material of cold-rolled steel sheet based on its application?
For general stamping parts: SPCC, DC01 (low cost, good formability); For complex deep-drawing parts: DC03, DC04 (high elongation, excellent stamping performance); For high-strength requirements: Q235 cold-rolled grade, HSLA (low-alloy high-strength cold-rolled sheet); For corrosion resistance requirements: 304, 316 stainless steel cold-rolled sheet.
What parameters need to be clarified when purchasing cold-rolled steel sheet?
The following need to be clarified: material, thickness (including tolerance requirements), width, length (or coil weight), surface quality grade, mechanical property requirements, applicable standards, and subsequent processing requirements (such as stamping, painting).
What are the "delivery conditions" of cold-rolled steel sheet? How to choose?
Annealed state (soft state, HRB≤60): Suitable for complex stamping and bending; Flat state (semi-hard state, HRB 60-80): Suitable for simple stamping and cutting; Cold-rolled hard state (unannealed, HRB≥80): Suitable for structural parts that do not require processing, with high strength. Selection criteria: The greater the difficulty of subsequent processing, the more necessary it is to choose the soft state.
What processing techniques are suitable for cold-rolled sheets?
Suitable for stamping (deep drawing, shallow drawing), bending, shearing, welding (arc welding, resistance welding), coating (painting, powder coating), electroplating (zinc plating, chrome plating), and other processing techniques.
What should be noted when stamping cold-rolled sheets? ① Choose a suitable lubricant (such as stamping oil) to avoid scratching the surface; ② Control the stamping speed and pressure to prevent the sheet from cracking; ③ The die clearance should match the sheet thickness (generally 10%-15% of the sheet thickness); ④ Annealed cold-rolled sheets are preferred to ensure formability.