1. Introduction to Carbon Steel Coils
Carbon steel coils are hot-rolled or cold-rolled strips of carbon steel, widely used in construction, automotive, and machinery industries due to their
Huaxiao-Alloy’s Manufacturing Capabilities
As a
Dimensions : Thickness (0.3–12.0mm), width (600–2,000mm), coil weight (3–15 tons). Processing : Hot-rolled (HRC), cold-rolled (CRC), galvanized (GI), or painted surfaces. Certifications : Mill Test Certificates (EN 10204 3.1), ISO 9001:2015 compliance. MOQ : 5 tons for standard grades; samples available for testing.
2. Carbon Steel Coil Grades & Specifications
Below is a scientific breakdown of key carbon steel grades we supply:
| ASTM A36 | Structural | ≤0.26 | ≤1.20 | ≥250 | 400–550 | ≥23 | Bridges, buildings |
| ASTM A1011 | SS Grades | ≤0.10 | 0.50–1.50 | 230–450 | 310–585 | 28–39 | Automotive panels |
| JIS G3131 | SPHC | ≤0.15 | 0.30–0.60 | ≥245 | 370–510 | ≥30 | Pipes, tubing |
| EN 10130 | DC01–DC06 | ≤0.12 | 0.30–0.60 | 140–280 | 270–410 | 28–44 | Appliances, furniture |
| GB/T 700 | Q235 | ≤0.22 | 0.30–0.65 | ≥235 | 370–500 | ≥26 | Machinery frames |
| Custom High-Carbon | C70 (0.70%C) | 0.68–0.73 | 0.60–0.90 | ≥600 | 1,000–1,300 | ≥7 | Cutting tools, springs |
3. Key Properties of Carbon Steel Coils
Chemical & Physical Parameters
Carbon Content : Ranges from 0.05% (ultra-low carbon) to 1.0% (high-carbon) , directly impacting hardness and ductility. Alloying Elements : Si, P, S tailored for weldability (<0.05% S/P) or machinability (controlled S). Density : 7.85 g/cm³ uniformly across grades. Thermal Conductivity : 45–65 W/m·K (hot-rolled excels in heat dissipation).
| Hardness (HV) | 100–150 | 150–250 | 250–400 |
| Machinability | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐ |
| Weldability | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐ |
| Corrosion Resistance* | ⭐⭐ | ⭐⭐⭐ | ⭐⭐⭐⭐ |
| (Improves with galvanizing or coating. Ask for coated options!) |
4. Industries We Serve
- Construction
: ASTM A36 carbon steel coils for structural beams. Automotive : Deep-drawing grades (DC06) for body panels. Machinery : High-strength C45 (ASTM A1064) for gears. Energy : P355GH (EN 10120) for pressure vessels.
5. Why Partner With Huaxiao-Alloy?
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6. Enhanced Industry FAQs
A: We supply C80 grades (0.78-0.83%C) with hardness up to HRC 60 after heat treatment (as per AMS 6491).
A: Yes – CVN impact testing at -20°C to -196°C per EN 10045 (additional cost applies).
A: Our equivalent grade HDX1018 guarantees tensile 440-550MPa, HRB 70 max, with controlled decarb depth <1% of thickness.
A: 15 tons for B-added grades (0.0005-0.005%B) to enhance hardenability.
A: We’re AS9100D certified for AMS 5062/5066 aircraft tube grades. Batch tracking included.
*A: Our Class A (O5 standard) coils guarantee:
- Zero scale pits
- Roll marks depth <3μm
- Max 1 scratch per 10m length*
A: 18 days for stock (8,000MT warehouse), 35 days for custom thickness.
A: Yes – Auto-replenishment programs available at major hubs: Rotterdam/USD 160/MT/year.
A: 3-layer protection: VCI paper + waterproof film + steel edge guards (per ASTM D3951).
A: +USD 25/MT for precision tolerance orders. MOQ 8 tons.
A: EN 10204 3.2 certificates provide full traceability: heat #, cast #, processing route.
A: Our Thermo-Mechanical Control Process (TMCP) ensures YS variation <15MPa per 1000MT.
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