What is the difference between SPCC cold-rolled steel sheet and DC01 cold-rolled steel sheet?

What is the difference between SPCC cold-rolled steel sheet and DC01 cold-rolled steel sheet?
SPCC and DC01 cold-rolled steel sheets are essentially ordinary low-carbon cold-rolled steels of the same grade and performance. Their core differences stem from differing standards, not from differences in material composition, mechanical properties, or application scenarios. The following details the differences and connections between the two, focusing on standard affiliation, key parameter comparison, and practical applications:
1. Core Differences: Different Implementation Standards and Different Grade Naming Systems
The "differences" between SPCC and DC01 primarily lie in the source of the standards and the logic of the grade definitions, which are the most fundamental differentiating points.
2. Key Performance Parameters: Completely Identical, No Essential Differences
Since both are positioned as "ordinary-grade low-carbon cold-rolled steel" and are materials of the same grade with mutually recognized standards (GB/T 11253 was developed with reference to JIS G 3141), their core performance parameters (composition, mechanical properties, and surface quality) are identical, with no actual differences:
1. Chemical Composition (Carbon Content is the Core Parameter)
Both are low-carbon steels, with perfectly matched ranges for key components like carbon and manganese content, ensuring consistent fundamental material properties:
Carbon (C): ≤0.15%
Manganese (Mn): ≤0.60%
Phosphorus (P): ≤0.045%
Sulfur (S): ≤0.045%
Silicon (Si): ≤0.10% (Some standard versions have minor adjustments, but these do not affect performance).
2. Mechanical Properties (Strength and Ductility are Equal)
For automotive, home appliance, and other industries, cold-rolled steel requires "formability" (elongation) and "basic strength" (yield strength and tensile strength). Both are identical in these two key parameters: