Carbon Steel Sheet | Mild Steel Sheet Metal (A36, 1018, Q235, SS400)

Huaxia Steel — Professional Carbon Steel Sheet Supplier
15+ years of experience | ISO 9001 & SGS Certified | Cut-to-size available | Custom processing | Global shipping

What is Carbon Steel Sheet?

Carbon steel sheets are thin, flat-rolled steel products with a thickness typically ranging from 0.5mm to 6mm, distinguishing them from steel plates (above 6mm). They are among the most versatile steel products, serving as raw material for stamping, bending, laser cutting, welding, and surface treatment processes. Huaxia Steel is a leading supplier of carbon steel sheets in hot-rolled, cold-rolled, and galvanized finishes, conforming to ASTM A36, A1008, JIS G3141, EN 10130, and GB/T standards.

Available Grades & Standards

Chemical Composition & Mechanical Properties of Common Carbon Steel Sheet Grades

Grade	Standard	C%	Mn%	Tensile (MPa)	Yield (MPa)	Elongation (%)
A36	ASTM A36	0.25–0.29	—	400–550	≥250	≥20
A1008 CS B	ASTM A1008	≤0.15	≤0.60	310–410	≥170	—
1018	ASTM A108	0.15–0.20	0.60–0.90	≥440	≥370	≥15
Q235B	GB/T 700	0.12–0.20	0.30–0.67	375–500	≥235	≥26
SS400	JIS G3101	≤0.15	—	400–510	≥245	≥17
SPCC	JIS G3141	≤0.15	≤0.60	≥270	—	—
DC01	EN 10130	≤0.10	≤0.45	270–410	—	—
S235JR	EN 10025-2	≤0.17	≤1.40	360–510	≥235	≥26
S355JR	EN 10025-2	≤0.22	≤1.60	470–630	≥355	≥22

Dimensions & Specifications

Carbon Steel Sheet Size Range & Tolerances

Parameter	Hot Rolled Sheet	Cold Rolled Sheet	Galvanized Sheet
Thickness	1.5–6.0mm	0.3–3.0mm	0.3–3.0mm
Width	600–2000mm	600–1850mm	600–1850mm
Length	1000–6000mm	1000–4000mm	1000–4000mm
Thickness Tol.	±0.10–0.15mm	±0.02–0.05mm	±0.03–0.06mm
Flatness	≤5mm/m	≤3mm/m	≤4mm/m
Standard	ASTM A6/A568	ASTM A1008	ASTM A653

Manufacturing Process

Carbon steel sheets are produced through the following process chain:

Hot Rolling: Steel slabs are heated to 1100–1250°C and rolled into sheets 1.5–6mm thick. The resulting product has a dark oxide surface and relatively wide tolerances, cost-effective for structural and non-critical applications.

Cold Rolling: Pickled hot-rolled sheets are further reduced at room temperature through precision rolling mills. Cold-rolled sheets achieve tight thickness control (±0.02mm), excellent surface quality, and improved mechanical properties—the preferred choice for exposed automotive components and precision stamping.

Galvanizing (Optional): Cold-rolled sheets can be hot-dip galvanized (GI) or galvannealed (GA) with a zinc coating (40–275 g/m²) for corrosion protection.

Surface Finish & Treatment Options

Available surface finishes:
– Hot Rolled (HR): Dark blue-grey oxide surface, mill finish
– Hot Rolled, Pickled & Oiled (HRPO): Scale removed, light oiled for rust prevention
– Cold Rolled (CR): Bright, smooth, scale-free surface
– Galvanized (GI): Zinc-coated (Z40–Z275) for outdoor/corrosive environments
– Galvannealed (GA): Zinc-iron alloy coating for superior paint adhesion
– Electro-galvanized (EG): Uniform zinc coating for precision applications

Common Applications

• Automotive body panels, fenders, doors, hoods, and structural reinforcements
• Home appliance housings: refrigerators, washing machines, microwave ovens, air conditioners
• Construction: wall panels, roofing sheets, decking, lintels, and structural components
• Metal furniture: desks, cabinets, shelving, lockers, and workbenches
• Electrical enclosures, junction boxes, switchgear housings
• Agricultural equipment: trailers, tool boxes, and machinery guards
• HVAC ductwork and components
• Shipbuilding interior bulkheads and non-structural panels

Why Choose Huaxia Steel as Your Carbon Steel Sheet Supplier?

Factory-Direct Pricing

Eliminate middlemen. Our direct mill partnerships ensure competitive pricing on every order, from small prototype quantities to full container loads.

Certified Quality

Every shipment includes full mill test certificates (MTC/EN 10204 3.1). ISO 9001:2015 certified. Third-party SGS inspection available on request.

Custom Processing

Cut-to-size, precision slitting, bending, welding, galvanizing, and surface treatment services. We deliver material ready for your production line.

Fast Global Logistics

Efficient shipping to North America, Europe, Middle East, Southeast Asia, and beyond. Standard lead time 7–15 days for stock items.

Frequently Asked Questions

What is the difference between carbon steel sheet and carbon steel plate?

The distinction is primarily by thickness. Steel sheets range from 0.15mm to 6mm, while steel plates start at 6mm and go up to 200mm+. Sheets are typically supplied in flat cut pieces or from coil (CTL), while plates are usually supplied as discrete flat pieces. Sheets are preferred for stamping and bending; plates for structural and load-bearing applications.

What does ‘mild steel sheet’ mean?

‘Mild steel’ refers to low-carbon steel with carbon content below 0.25% (typically 0.05–0.20%). Mild steel sheets are the most common type of carbon steel sheet, offering excellent weldability, formability, and machinability at an affordable price. Grades like A36, Q235, and S235JR are all classified as mild steel.

Can you cut carbon steel sheets to custom sizes?

Yes. Huaxia Steel provides precision cut-to-length (CTL) services. We can shear sheets to any dimension within our range with tolerance of ±2mm for length and ±1mm for width. Laser cutting and waterjet cutting are also available for complex shapes.

What is the standard sheet size?

Common standard sizes include: 4×8ft (1220×2440mm), 5×10ft (1524×3048mm), 6×12ft (1829×3658mm), and 2×4ft (610×1219mm). Custom dimensions are readily available.

Is carbon steel sheet magnetic?

Yes, all carbon steel sheets are ferromagnetic and will respond to magnets. The magnetic permeability of low-carbon steel is very high, making it suitable for magnetic shielding and electromagnetic applications.