1. Material Standards & Grades

Primary Standard:

• JIS G 3141 - Cold-rolled carbon steel sheets and strips

Designation System:

• SPCC: Commercial quality cold-rolled steel

• Equivalent to: DC01 (EN), CR1 (ASTM), Q195 (GB)

Surface Quality Classes:

2. Chemical Composition (% by weight)

3. Mechanical Properties

4. Physical Properties

5. Product Specifications

6. Manufacturing Process

Production Steps:

• Hot-rolled coil pickling

• Cold rolling (40-80% reduction)

• Continuous annealing

• Skin pass/temper rolling

• Leveling and cutting

• Inspection and packaging

Key Process Parameters:

• Annealing temperature: 680-720°C

• Skin pass reduction: 0.5-1.5%

• Surface roughness: Ra 0.1-0.8μm

7. Surface Finish Options

8. Testing & Inspection

Standard Tests:

• Tensile test (JIS Z 2241)

• Bend test (JIS Z 2248)

• Rockwell hardness test (JIS Z 2245)

• Chemical analysis (JIS G 0321)

• Surface roughness measurement

• Visual inspection

• Dimensional inspection

Optional Tests:

• Erichsen cupping test (JIS Z 2247)

• Microstructure examination

• Non-destructive testing

• Salt spray test (JIS Z 2371)

• Third-party inspection

9. Applications

Primary Applications:

• Automotive: Body panels, interior components, brackets

• Electronics: Chassis, covers, enclosures

• Home Appliances: Refrigerator panels, washing machine parts

• Office Equipment: Printer frames, copier components

• General Manufacturing: Metal furniture, containers, displays

Secondary Processing:

• Stamping and deep drawing

• Welding and assembly

• Painting and coating

• Electroplating

• Powder coating

All SPCC carbon steel plates are manufactured according to JIS G 3141 standards and can be customized to meet specific customer requirements and application needs.