Carbon Steel Coil Supplier & Manufacturer | All Grades & Specifications

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 high strength, formability, and cost-effectiveness. As a premier carbon steel coil manufacturer and supplier, Huaxiao-Alloy guarantees compliance with ASTM, JIS, EN, and GB standards, ensuring precise mechanical properties and chemical consistency.

Huaxiao-Alloy’s Manufacturing Capabilities

As a global carbon steel coil supplier, we provide:

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:

Grade Standard	Grade Name	C% (Carbon)	Mn% (Manganese)	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)	Primary Applications
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).

Mechanical Performance

Property	Low-Carbon Steel	Medium-Carbon Steel	High-Carbon Steel
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?

✅ All-Grade Guarantee: From deep-drawing DC01 (EN 10130) to tool steel C55U (ISO 4954)
✅ Processing Technology: Laser fusing for edge repair, tension leveling for ±0.5 I-units flatness
✅ Zero-Carbon Footprint: 40% production using EAF scrap (ISO 14064 certified)