Steel strength and hardness significantly impart internal stresses on the material. Therefore, greater cold rolled steel coil with greater strength and hardness has greater internal stresses than hot rolled steel. It is crucial to relieve such stresses before processing the material to prevent the warping of the final product.
Steel Grade | Chemical composition % | ||||
C | Mn | P | S | Alta | |
SPCC | ≤0.12 | ≤0.50 | ≤0.035 | ≤0.025 | ≥0.020 |
a: when C≤0.01, Alt≥0.015 for all steel grades | |||||
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