Spangle-Free Galvanized Steel Coils | 0.18-6mm Thick | JIS G3302 Standard | OEM Supply
Spangle-Free Galvanized Steel Coils are precision-engineered for industries requiring flawless surface finishes and strict adherence to JIS G3302 standards. With a smooth, uniform zinc coating (no visible spangle) and thickness options from ultra-thin 0.18mm to heavy-duty 6mm, these coils are ideal for automotive, electronics, and premium appliance manufacturing. The advanced galvanizing process ensures superior paint adhesion, weldability, and corrosion resistance (15–30+ years) while meeting exacting OEM specifications.
Key Benefits:
- Aesthetic Excellence: Mirror-like surface (Ra ≤0.5µm) for high-end painted or plated finishes.
- JIS G3302 Compliance: Certified for SGCC, SGH340, and SGCH1R grades, trusted in Japanese and Asian markets.
- OEM Flexibility: Custom widths (300–2,000mm), coil weights (3–25 tons), and zinc coatings (Z60–Z350).
- Corrosion Resistance: 100% chromate-free passivation for RoHS/REACH compliance and salt spray resistance (1,000+ hours).
- Cost Efficiency: 15–20% lower material waste vs. spangled coils due to precision stamping.
- Fast Prototyping: 7-day sample lead time with CAD/CAM file compatibility for rapid OEM integration.
2. Technical Specifications
| Parameter | Details |
| Base Material | Low-Carbon Steel (C ≤0.12%, Mn ≤0.50%, Si ≤0.03%, P ≤0.035%, S ≤0.035%) |
| Coating Type | Spangle-Free Hot-Dip Galvanized (Zinc: 60–350g/m² ±10%) |
| Grades | JIS G3302 (SGCC, SGH340, SGCH1R), ASTM A653 (SS Grade 33), EN 10346 (DX51D) |
| Thickness Range | 0.18mm–6mm (±0.02mm for ≤1mm, ±0.05mm for >1mm) |
| Coil Dimensions | Width: 300–2,000mm (±1mm), ID: 508/610mm, OD: 800–2,500mm |
| Mechanical Properties | Tensile Strength: 270–550 MPa, Yield Strength: 180–420 MPa, Elongation: 15–35% |
| Surface Properties | Smooth finish (Ra 0.3–0.7µm), oil-free or dry film lubrication (0.5–3g/m²) |
| Certifications | JIS G3302, ISO 1461, RoHS, REACH, ISO 9001/14001, IATF 16949 |
| Key Applications | Automotive body panels, LED lighting housings, elevator interiors, and luxury appliance casings |
3. Why Choose Us for OEM Supply?
Competitive Advantages:
- Price Leadership: 30% lower than Japanese/Korean suppliers with identical JIS G3302 certification.
- OEM-Centric Service: Dedicated R&D team for custom alloy adjustments, hardness (HRB 40–80), and coating thickness.
- Zero-Defect Assurance: 100% automated surface inspection (AOI) and eddy current testing for coating uniformity.
- Sustainable Solutions: Halogen-free, low-VOC production with carbon-neutral shipping options.
- Just-in-Time Delivery: 10–15 days lead time for bulk orders (50+ tons) with Kanban system integration.
- Technical Partnership: Free DFM (Design for Manufacturing) analysis to optimize part performance and costs.
4. Premium Industrial Applications
| Industry | Use Cases |
| Automotive | Car door panels, EV battery trays, motorcycle fuel tanks, and trim moldings. |
| Consumer Electronics | Smartphone frames, laptop chassis, and wearable device components. |
| Home Appliances | Refrigerator doors, washing machine drums, and premium kitchen range hoods. |
| Architecture | Decorative wall cladding, elevator cabin interiors, and luxury retail fixtures. |
| Medical Equipment | MRI machine casings, surgical instrument trays, and hospital bed frames. |
| Renewable Energy | Solar panel backsheets, inverter housings, and wind turbine sensor covers. |
| Packaging | High-end cosmetic containers, luxury gift boxes, and precision machinery guards. |
FAQ
1. Do you have your own factory?
Yes, we do. We have our own factory, we can provide stable inventory, competitive prices and good quality.
2. What is your surface treatment method?
We can make special logos, icons or other things you order on the products. No matter what, we can do it as per your request.
3. What kind of payment can you accept?
1).100% irrevocable L/C at sight.
2).30% T/T in advance, the balance according to the copy of the bill of lading.
3).30% T/T in advance and balance of L/C.
4. How about the delivery time?
5-7 days after deposit received.
5. Why choose our company?
A). We have more stable inventory, competitive prices and good quality.
B). We have more integrity experience in international trade.
C). We can provide personal customization services, such as adding your company's logo, specified colors, etc. to the product.
6. What is the use of the product?
Galvanized Steel Coils, industry, chemical industry, secondary processing, construction, etc.
7. Can you send samples for inspection?
We can. We can send you samples for free.
8. Can you make products according to our requirements?
Yes, we will strictly follow your requirements, such as packaging method, product length, product handling method, etc.
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Spangle Free Galvanized Steel Coils 0.18mm-6mm Thick JIS G3302 Standard OEM Images
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