What Does the SPCC Designation Mean
SPCC originates from the Japanese JIS standard. S represents steel, P represents plate, C represents cold-rolled, and the last C represents ordinary grade. Overall, it refers to general-purpose cold-rolled carbon steel sheets and strips, with the designation defined in JIS G3141.
Corresponding Grades
SPCC is equivalent to the Chinese Q195-215A grade. Some sources suggest it corresponds to 08Al or DC01. The equivalents share similar strength and forming characteristics, though the specific composition and tolerance requirements of the applicable standard should be verified.
Core Chemical Composition
The core composition of SPCC is carbon 0.10 percent maximum, silicon 0.05 percent maximum, manganese 0.50 percent maximum, phosphorus 0.035 percent maximum, and sulfur 0.025 percent maximum. The low carbon content ensures good formability and weldability.
Tensile Strength
The tensile strength is typically 270 to 410 MPa. The mechanical properties are moderate, making SPCC suitable for most cold-working applications such as stamping, bending, and shallow drawing.
Heat Treatment and Temper Codes
The codes for different heat treatment states of SPCC boards are: A represents annealing, S represents annealing plus leveling, 8 represents one-eighth hard, 4 represents one-quarter hard, 2 represents one-half hard, and 1 represents hard. Higher temper numbers mean more cold work and higher hardness with lower ductility.
Frequently Asked Questions
Q: What does SPCC mean?
S is steel, P is plate, C is cold-rolled, and the last C is ordinary grade, meaning general-purpose cold-rolled carbon steel sheet.
Q: What is the Chinese equivalent of SPCC?
Q195-215A, with some sources citing 08Al or DC01 as equivalents.
Q: What is the carbon content of SPCC?
0.10 percent maximum, with manganese 0.50 percent, phosphorus 0.035 percent, and sulfur 0.025 percent maximum.
Q: What is the tensile strength of SPCC?
Typically 270 to 410 MPa.
Q: What does the code 4 mean for SPCC?
One-quarter hard temper, with moderate hardness from partial cold work.
Q: What is the difference between codes A and 1?
A is fully annealed and soft; 1 is hard from full cold work with maximum strength and minimum ductility.