Q235 Cold Rolled Steel belongs to low-carbon structural steel with a carbon content of about 0.12%-0.2%, which is equivalent to ordinary 10 and 20 steel. The hardness does not change much after quenching.
| Product | Q235 Cold Rolled Steel Coil |
| Grade | SGCC,SGHC,CGCC,DC51D DX51D DX52D DX53D DX54D SGH340 SGH400 SGH440 SGH490 SGH540 SGC340 SGC400 SGC440 SGC490 SGC570 |
| Standard | ASTM A653,JIS G3321,GB/T2518 |
| Raw material | SPHC,SPCC,SPCD,SPCE,DC01,DC11 S220GD S250GD S280GD S320GD S350GD S400GD S500GD S550GD |
| Technique | Cold rolled and Hot rolled |
| Spangle | Zero spangle,Mini spangle,Regular spangle,Big spangle |
| Surface treatment | chromed,skin pass,oiled,unoiled,slightly oiled,dry |
| Zinc coating | 20-275g/m2 |
Q235 Cold Rolled Steel is generally bought without heat treatment. Generally, it is used in places where a large amount of steel is needed in engineering. The quantity is huge. Generally, it is used after hot rolling. Hot rolling is also a heat treatment of normalizing.
There are several reasons for not heat treatment,
1 These occasions do not require too high mechanical requirements.
2 The volume of these steel components is too large, and the heat treatment is difficult.
3 These steels are often used for welding. After heat treatment, the heat treatment of the weld will be destroyed during the welding process.
4. The material is cheap, the quality requirement is relatively low, and it is low-carbon steel, and the heat treatment effect is not good.
5 If you have to use Q235 to quench the hardness, you can only carburize, and the cost is too high.
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