What is the main chemical composition range of SPCC coils?
A: The range varies slightly depending on the standard, but the general range is C≤0.10%, Si≤0.05%, Mn≤0.50%, P≤0.035%, S≤0.025%. Some standards limit the C content to 0.02-0.08%.
Are there specific requirements for the mechanical properties of SPCC coils in JIS standards?
A: JIS standards do not have mandatory requirements for the yield strength, tensile strength, and elongation of SPCC. In domestic reference standards, the yield strength is generally 130-300 MPa, and the tensile strength is 270-410 MPa.
How can I guarantee the tensile test value of SPCC coils?
A: Add a "T" to the end of the SPCC grade, i.e., SPCCT. This grade guarantees the tensile test value and other mechanical properties.
What do the different suffix letters and numbers after the SPCC coil grade mean?
A: Letters like A represent annealing only, and S represents annealing + leveling; numbers like 8 represent 1/8 hard, 4 represent 1/4 hard, 2 represent 1/2 hard, and 1 represent hard, applicable only to SPCC.
What are the surface finishes of SPCC coils?
A: Mainly matte (code D) and smooth (code B). Matte finishes are made by rolling with rough-surfaced rolls, while smooth finishes are made by using finely machined smooth rolls.