1. Basic Definition & Applicable Standards
SPCC is the Japanese JIS standard cold rolled carbon steel, widely adopted in Southeast Asia, Middle East and domestic markets. DC01 follows European EN 10130 standard, the mainstream material for European export orders. Though both belong to general cold rolled steel, their chemical composition, surface grade and forming performance have clear gaps, which directly affect overseas project procurement and deep processing yield.
2. Contrast of Surface Finish & Brightness
SPCC Cold Rolled Coil
• Default surface type: Standard bright finish, divided into SD (dull) and SB (bright) two grades.
• Limitation: Surface roughness fluctuation range is wide; tiny roller marks and slight color difference are allowed in industry acceptance standards. It is hard to reach ultra-uniform gloss required by high-end home appliance and automotive parts.
• Shipping defect risk: Thin passive film is easy to oxidize and turn yellow during long sea transportation, resulting in reduced surface brightness.
DC01 Cold Rolled Coil
• Standard surface categories: A surface (visible minor defects allowed) and B surface (zero visible scratches, uniform gloss), fully matching EU high-standard inspection rules.
• Ra value control: Strictly limited within 0.4–0.8μm, consistent surface texture without streaks or local dim areas.
• Anti-oxidation advantage: Factory complete passivation treatment forms compact protective film, effectively maintaining surface brightness in long-distance ocean transit.
3. Deep Drawing & Forming Performance Comparison
1. Elongation rate difference
SPCC average elongation is 28%–34%, only fit simple bending, shallow stamping parts like cabinet shells and ordinary metal brackets.
DC01 elongation reaches 32%–38%, with better plastic flow capacity, supporting medium deep drawing products such as automotive inner structural parts and household appliance shells.
2. Stamping defect resistance
SPCC is prone to orange peel, cracking and wrinkling when stretched deeply; DC01 has more stable grain structure, significantly lowering reject rate of deep drawing processing.
3. Application boundary
• Choose SPCC: Low-cost general structural parts, non-visible decorative components, orders for Southeast Asia and Africa with loose surface requirements.
• Choose DC01: EU market exports, exposed appearance parts, medium deep drawing stamping workpieces with strict surface standards.
4. Overseas Procurement & Delivery Suggestions
1. Confirm market standard in advance: European customers prioritize DC01; Asian and African buyers can select SPCC to control raw material cost.
2. Specify surface grade clearly in contracts: B-surface DC01 is required for visible exterior panels; SB-grade SPCC is enough for internal non-display parts.
3. Unified export protection: Both steel coils adopt VCI anti-rust film wrapping and moisture-proof desiccant loading to avoid oxidation discoloration affecting surface finish.
निष्कर्ष
SPCC features low cost and meets basic stamping demands for low-standard emerging markets. DC01 boasts uniform surface brightness and superior deep drawing performance, complying with EU strict export inspection standards. Select suitable material grade according to target market, product appearance requirement and stamping depth to balance project cost and finished product qualification rate.
