What Is JIS G3141 SPCC Cold-Rolled Commercial Steel?
GNEE STEEL's JIS G3141 SPCC cold-rolled commercial steel is a high-performance, cost-effective low-carbon steel grade defined by the Japanese Industrial Standards (JIS) G3141, designed for general-purpose fabrication and mass production. As a leading supplier of JIS G3141 SPCC cold-rolled steel, we provide consistent quality, precise dimensions, and reliable mechanical properties, making it the top choice for industries requiring excellent formability, uniform surface finish, and economical solutions. Whether for stamping, bending, coating, or general manufacturing, our SPCC cold-rolled steel meets strict JIS G3141 standards, ensuring optimal performance and compatibility with your production processes.
JIS G3141 SPCC Material Properties
JIS G3141 SPCC cold-rolled commercial steel is characterized by its low carbon content, superior formability, and stable mechanical performance, which are strictly controlled to meet the requirements of JIS G3141 standard. Below are the detailed material properties, including chemical composition, mechanical properties, and physical characteristics, ensuring data accuracy and compliance with industrial standards.
1. Chemical Composition (JIS G3141 Standard)
The chemical composition of JIS G3141 SPCC is carefully regulated to ensure good ductility, weldability, and formability. The maximum content of harmful impurities is strictly limited to avoid brittleness and ensure consistent performance across batches.
|
Element |
Content Range (Max %) |
Function & Significance |
|---|---|---|
|
Carbon (C) |
0.15% |
Provides basic strength; low content ensures excellent ductility and formability for stamping and bending |
|
Manganese (Mn) |
0.60% |
Improves hardenability and deoxidizes the steel during melting, enhancing overall toughness |
|
Phosphorus (P) |
0.050% |
Controlled impurity; limits brittleness and improves weldability in various fabrication processes |
|
Sulfur (S) |
0.050% |
Restricted to prevent hot shortness and improve machinability for smooth processing |
|
Silicon (Si) |
0.05% |
Trace element that maintains steel purity and ensures consistent mechanical performance |
|
Iron (Fe) |
Balance |
Base element that determines the core structure and mechanical properties of the steel |
2. Mechanical Properties (Room Temperature, Annealed Condition)
JIS G3141 SPCC cold-rolled steel exhibits stable mechanical properties, with tensile strength, yield strength, and elongation strictly controlled to meet the needs of general-purpose forming and fabrication. The data below is in line with JIS G3141 standards and verified by our factory testing.
|
Mechanical Property |
Specification (Min/Range) |
Unit |
Application Significance |
|---|---|---|---|
|
Tensile Strength (Rm) |
≥ 270 |
MPa |
Ensures adequate load capacity for structural and functional components |
|
Yield Strength (Rp0.2) |
140 - 280 |
MPa |
Supports forming without excessive spring back, ideal for stamping and bending |
|
Elongation (A50) |
≥ 34 |
% |
High ductility for deep drawing, shallow drawing, and complex forming operations |
|
Hardness (HRB) |
50 - 85 |
HRB |
Soft enough for easy processing, while maintaining structural stability |
|
Bending Performance |
180° Bend, No Cracking |
- |
Suitable for bending operations up to 2.0mm thickness without damage |
3. Physical Properties
The physical properties of JIS G3141 SPCC cold-rolled steel ensure compatibility with various processing and application scenarios, including coating, plating, and high-temperature environments.
Density: 7.85 g/cm³ (standard steel density, ensuring consistent weight calculation for production)
Melting Range: 1480 - 1526 °C (stable at high temperatures during fabrication)
Elastic Modulus: 200 - 215 GPa (excellent structural elasticity for forming)
Thermal Expansion Coefficient: 11.2 - 13.8 × 10⁻⁶/°C (20 - 100°C, minimal deformation during temperature changes)
Thermal Conductivity: 25 - 93 W/(m·K) (varies with temperature, suitable for heat-related applications)
SPCC-SD Surface Roughness Specification
Below are the detailed SPCC-SD surface roughness specifications, verified by our quality control team to meet industrial application requirements:
|
Surface Grade |
Surface Finish |
Roughness (Ra) |
Roughness (Rz) |
Application Advantages |
|---|---|---|---|---|
|
SPCC-SD |
Dull (Matte), Non-Reflective |
0.8 - 1.6 μm |
6.3 - 12.5 μm |
Excellent adhesion for painting, powder coating, and plating; avoids reflection in visible applications |
Note: The surface roughness can be adjusted slightly according to customer requirements, while still complying with JIS G3141 standards. GNEE STEEL ensures that every batch of SPCC-SD cold-rolled steel has a uniform, blemish-free surface, free from scratches, oxide scales, or other defects that may affect subsequent processing.
Common Applications of JIS G3141 SPCC Cold-Rolled Steel
JIS G3141 SPCC cold-rolled commercial steel is widely used in various industries due to its balanced performance and cost-effectiveness. Its applications include, but are not limited to:
Home Appliances: Cabinets, panels, brackets, and inner components of washing machines, refrigerators, air conditioners, and microwave ovens.
Automotive Industry: Interior trim parts, door panels, brackets, and non-structural components that require good formability.
Metal Furniture: Frames, panels, and accessories for office furniture, household furniture, and storage equipment.
Electrical Enclosures: Casings for electrical equipment, control cabinets, and junction boxes, leveraging its excellent surface quality and formability.
General Fabrication: Stamped parts, shallow-drawn components, hardware, and decorative parts that require painting or plating.
Substrate for Coating/Plating: Ideal base material for galvanized (GI/EG) and color-coated (PPGI) steel sheets, enhancing corrosion resistance.
Home Appliances
Automotive Industry
Architectural Applications
GNEE Partners
Frequently Asked Questions (FAQ)
What is JIS G3141 SPCC cold-rolled commercial steel?
JIS G3141 SPCC is a commercial-grade cold-rolled low-carbon steel defined by the Japanese Industrial Standards (JIS) G3141. It is a general-purpose steel with excellent formability, uniform surface quality, and cost-effectiveness, widely used in various fabrication and manufacturing industries.
What is the difference between SPCC and SPCC-SD?
SPCC is the base grade of JIS G3141 cold-rolled commercial steel, while SPCC-SD is a sub-grade with a dull (matte) surface finish. SPCC-SD is optimized for coating and plating due to its controlled surface roughness, while SPCC can have different surface finishes (e.g., bright finish SPCC-SB).
Does JIS G3141 SPCC steel have good weldability?
Yes. The low carbon content (≤0.15%) and controlled impurity content (P≤0.050%, S≤0.050%) make SPCC steel suitable for various welding methods, including resistance welding, arc welding, and laser welding, with no cracking or brittleness after welding.
Can SPCC steel be used for deep drawing?
SPCC steel has good ductility (elongation ≥34%) and is suitable for shallow to medium deep drawing. For deep drawing applications requiring higher formability, we recommend SPCD or SPCE grades (also compliant with JIS G3141).
What are the available thickness and width of your SPCC cold-rolled steel?
We offer flexible specifications: thickness ranges from 0.3mm to 3.5mm, width ranges from 600mm to 1500mm. Custom thickness and width can be provided according to your specific requirements.
How do you ensure the quality of SPCC steel?
Every batch of SPCC steel undergoes strict quality testing, including chemical composition analysis, mechanical property testing, surface roughness inspection, and dimensional accuracy measurement. We have a professional quality control team and advanced testing equipment to ensure compliance with JIS G3141 standards.
What is the delivery time for SPCC cold-rolled steel?
For in-stock products, the delivery time is 5-7 working days. For custom specifications, the delivery time is 15-30 working days, depending on the order quantity and production schedule.
Do you provide samples of JIS G3141 SPCC steel?
Yes. We provide free samples (up to 2 pieces) for your testing and verification. Please contact our sales team to request samples, and we will deliver them to you as soon as possible.
Contact GNEE STEEL now - Your Reliable JIS G3141 SPCC Cold-Rolled Steel Supplier!