Comparing the Mechanical Properties of SPCC with Other Steels

SPCC (generally cold-rolled carbon steel plate), as a representative of low-carbon cold-rolled steel, exhibits significant differences in mechanical properties from other types of steel (such as hot-rolled steel, high-strength steel, and alloy structural steel). These differences are primarily determined by composition and processing (cold rolling/hot rolling, heat treatment, etc.). The following compares the core mechanical properties and characteristics of SPCC with common steel types:
1. Comparison with Hot-Rolled Low-Carbon Steel (such as SPHC)
SPHC is designated as "general-use hot-rolled carbon steel plate" in Japanese standards. It is a similar low-carbon steel to SPCC, but uses different processes (hot rolling vs. cold rolling), resulting in significant performance differences:
Performance Parameters: SPCC (cold rolled) SPHC (hot rolled)
Tensile Strength: 270-370 MPa
270-410 MPa
Yield Strength: ≥130 MPa
≥180 MPa
Elongation (50mm gauge length): ≥30%
≥25%
Hardness: 60-80 HB
50-70 HB
Surface Quality: Smooth, high precision
Rougher, lower precision
Core Differences:
After cold rolling, SPCC has a slightly lower yield strength than SPHC, but higher elongation (better ductility) and a smoother surface, making it suitable for applications requiring high-precision forming (such as appliance housings).
SPHC The hot-rolled state has greater strength fluctuations and slightly worse plasticity, but the cost is lower and it is suitable for simple forming or subsequent processing (such as welding and cutting).