What's JAC270C Steel?
JAC270C steel is a high-quality cold-rolled, hot-dip galvanized steel grade designed primarily for automotive and general engineering applications, offering exceptional formability, balanced mechanical properties, and reliable corrosion resistance. As a specialized commercial-grade steel conforming to Japanese automotive standards (JFS), it delivers an optimal blend of ductility and strength, making it ideal for complex stamping, bending, and deep-drawing processes. Widely used in vehicle body components, home appliances, and metal furniture, JAC270C steel provides consistent performance for manufacturers requiring precision-formed parts with smooth surface finishes.
Core Standard & Grade Definition
JAC270C follows the JFS (Japan Ferrous Steel Federation) standards for cold-rolled and galvanized automotive steels. The grade designation breaks down as:
- JAC: Japanese Automotive Cold-rolled steel
- 270: Minimum tensile strength of 270 MPa (the defining performance benchmark)
- C: Commercial quality grade with standard formability characteristics
This steel is typically supplied as hot-dip galvanized (Zn-Fe alloy coated) coils, sheets, or strips, with thicknesses ranging from 0.4mm to 3.2mm.
Chemical Composition (JAC270C Steel)
The low-carbon chemical composition of JAC270C is precisely balanced to maximize formability while maintaining structural integrity.
| Element | Content Range (%) | Key Function |
|---|---|---|
| Carbon (C) | ≤ 0.12 | Ensures low hardness, excellent ductility and weldability |
| Manganese (Mn) | 0.30 – 0.60 | Enhances strength and toughness; prevents brittleness |
| Phosphorus (P) | ≤ 0.035 | Controlled to minimize cold brittleness |
| Sulfur (S) | ≤ 0.035 | Reduced to improve forming and surface quality |
| Silicon (Si) | ≤ 0.05 | Deoxidizer; supports fine grain structure |
| Aluminum (Al) | ≤ 0.02 | Grain refiner; boosts deep drawability |
| Iron (Fe) | Balance | Base metal matrix |
Note: Composition conforms to JIS G3302 and internal automotive quality specifications.
Mechanical Properties (By Thickness Range)
JAC270C steel offers consistent mechanical performance across its standard thickness spectrum, critical for mass production stability.
| Grade | Thickness (mm) | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (A80, %) |
|---|---|---|---|---|
| JAC270C | 0.4 – 1.0 | 175 – 275 | ≥ 270 | 38 – 53 |
| JAC270C | 1.0 – 1.6 | 180 – 285 | ≥ 270 | 36 – 50 |
| JAC270C | 1.6 – 3.2 | 185 – 300 | ≥ 270 | 34 – 48 |
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Key Performance Advantages:
Exceptional formability: High elongation (34%–53%) enables complex deep drawing, bending, and flanging without cracking
Balanced strength: Yield strength (175–300MPa) supports structural rigidity while remaining malleable
Uniform r-value: Average plastic strain ratio ≥1.2, ensuring consistent material flow during stamping
Smooth galvanized surface: Zn-Fe alloy coating (60–440g/m²) provides long-term corrosion protection
Primary Applications of JAC270C Steel
JAC270C's unique property combination makes it a top choice across industries requiring high-quality formed steel components:
Automotive Industry (Primary Market)
Body panels: Doors, hoods, fenders, roof panels
Chassis & structural parts: Floor pans, cross members, seat frames
Interior components: Instrument panel substrates, trim panels
Under-hood parts: Shielding, brackets, and non-load-bearing housings
Home Appliances & Electrical Goods
Refrigerator cabinets & inner linings
Washing machine drums & casings
Air conditioner housing components
Oven and dishwasher panels
General Engineering & Consumer Goods
Metal furniture frames and enclosures
Electrical control boxes and cabinets
Lighting fixture components
Decorative metal parts
HVAC ducting and accessories
Surface & Coating Specifications
JAC270C is predominantly supplied as hot-dip galvanized steel (Zn-Fe alloy coating) with strict surface quality controls:
Coating type: Zinc-iron (ZF) alloy galvanized coating
Coating mass: Double-sided: 60–440 g/m²; Single-sided: 30–220 g/m²
- Surface finishes:
Oiled (O): Standard for corrosion protection during transit/storage
BNA: Bright non-annealed for improved paint adhesion
FD/FC/FB: Passivated, chromated, or phosphate-treated surfaces
R/D: Rough or dull finish for specific bonding requirements
Equivalent Grades Comparison
JAC270C has international equivalents with similar properties, though slight variations exist:
| JAC270C (JFS) | Equivalent Grade | Standard | Key Difference |
|---|---|---|---|
| JAC270C | JSC270C | JIS G3141 | Closest match; minor surface standard variations |
| JAC270C | DC03/DC04 | EN 10130 | Slightly lower elongation; European deep-drawing grade |
| JAC270C | SPCE | JIS G3141 | Softer; better for extreme deep drawing |
| JAC270C | St14 | DIN 1623 | European commercial deep-drawing steel |
JAC270C steel stands as the premium choice for manufacturers demanding high formability, reliable strength, and superior corrosion resistance in one material. Its balanced mechanical properties, strict quality standards, and versatile coating options make it indispensable for automotive, appliance, and general engineering applications where precision forming and long-term durability are critical. Whether producing complex automotive body components or high-quality appliance parts, JAC270C delivers consistent performance that reduces production costs and enhances end-product quality.
At GNEE STEEL, we stock JAC270C cold-rolled galvanized steel coils & sheets in full range of thicknesses (0.4–3.2mm) and widths, with customizable coating weights and surface finishes. Our JAC270C products meet strict JFS automotive standards, ensuring flawless formability and consistent quality for your most demanding projects.
Frequently Asked Questions (FAQ) – JAC270C Steel
1. What is the primary difference between JAC270C and JSC270C steel?
JAC270C and JSC270C are closely related; JAC270C is the automotive-specific grade (JFS standard) optimized for vehicle production, while JSC270C follows general JIS cold-rolled steel standards. JAC270C typically has stricter surface quality and coating uniformity requirements for automotive applications.
2. Is JAC270C suitable for deep drawing applications?
Yes, absolutely. JAC270C is specifically engineered for deep drawing and complex forming operations, with high elongation (34%–53%) and excellent plastic strain ratios (r-value ≥1.2) that prevent wrinkling or tearing during severe deformation.
3. What coating options are available for JAC270C steel?
JAC270C is primarily supplied as hot-dip Zn-Fe alloy galvanized steel with coating weights from 60–440g/m² (double-sided). Optional surface treatments include oiled, passivated, chromated, or phosphate-coated finishes to meet specific fabrication or painting requirements.
4. What is the minimum order quantity for JAC270C steel?
Standard MOQ for JAC270C coils is 20–25 tons, while sheet orders start at 5 tons. GNEE STEEL offers flexible order quantities and mixed container loads to accommodate both small-scale and large-volume requirements.
5. Can JAC270C steel be welded easily?
Yes. JAC270C's low-carbon composition (≤0.12%) provides excellent weldability using all common methods: resistance welding (spot/seam), MIG, TIG, and laser welding. Proper welding parameters maintain material ductility and coating integrity.
6. What thicknesses and widths are available for JAC270C?
JAC270C is typically produced in thicknesses of 0.4mm to 3.2mm and widths from 800mm to 1500mm. Custom slitting and cutting services are available to your exact dimensional specifications.
7. How does JAC270C compare to standard DC03/DC04 steel?
JAC270C offers slightly higher tensile strength consistency and automotive-grade surface quality compared to DC03/DC04. Both are deep-drawing grades, but JAC270C's galvanized coating provides superior corrosion resistance for exterior applications.
8. What industries most commonly use JAC270C steel?
Automotive manufacturing is the primary market (60%+ of usage) for body components and structural parts. Secondary major industries include home appliances (refrigerators, washing machines), electrical enclosures, metal furniture, and HVAC equipment.
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