ASTM A283 Grade C Carbon Steel Coil
ASTM A283 Grade C Carbon Steel Coil: Properties, Equivalents & Applications
Comprehensive data sheet for ASTM A283 Grade C carbon steel coil: chemical composition, mechanical and physical properties, international equivalents, and application guidance for structural engineering.
Hot rolling, cold rolling, pickling, oiling, leveling, slitting, blanking, forming, welding
- Phone : +8618037372205
- Email : [email protected]
- WhatsApp: Contact via Whtsapp
- WeChat: +8618037372205
ASTM A283 Grade C Carbon Steel Coil Introduction
ASTM A283/A283M Grade C is a low-to-intermediate tensile strength carbon steel used primarily for structural applications in the as-rolled condition. It is suitable for welded, bolted, and riveted construction in buildings, bridges, and general engineering structures. The steel offers good formability, weldability, and toughness at ambient temperatures. Typical thicknesses for coil products range up to 40 mm, with mechanical properties tailored to moderate strength requirements. The material is not intended for pressure vessels or high-strength quenched-and-tempered applications. Its chemistry is controlled to ensure reliable welding and forming, while maintaining cost-effectiveness.
ASTM A283 Grade C Carbon Steel Coil Chemical Composition
The following table complies with ASTM A283/A283M-18 for Grade C. Values are maximum unless a range is indicated. Silicon is controlled when semi-killed or killed steel is specified. Copper may be present as a residual or as an intentional addition for atmospheric corrosion resistance; when specified as a copper steel, a minimum copper content is required.
| Element | Standard Value (max, wt%) | Remarks |
|---|---|---|
| Carbon (C) | 0.24 (thickness ≤ 40 mm) 0.27 (thickness > 40 mm) | For plate, coil, and strip |
| Manganese (Mn) | 0.90 | Maximum; for thickness > 40 mm and copper steel selected, Mn may be adjusted to 0.80 max |
| Phosphorus (P) | 0.030 | Maximum by heat analysis |
| Sulfur (S) | 0.030 | Maximum by heat analysis |
| Silicon (Si) | 0.40 max (0.15–0.40 when silicon-killed) | Optional; range applies when silicon-killed steel is specified |
| Copper (Cu) | 0.20 min (when copper steel is specified) otherwise residual | Copper content ≥ 0.20% provides improved atmospheric corrosion resistance (optional) |
ASTM A283 Grade C Carbon Steel Coil Thermal and Electrical Physical Properties
The following data are typical for carbon steel and provide guidance for design calculations. They are not specification requirements but are commonly used for ASTM A283 Grade C. Actual values may vary slightly with composition, heat treatment, and temperature.
| Property | Typical Value | Unit | Test Condition |
|---|---|---|---|
| Density (ρ) | 7.85 | g/cm³ | Room temperature |
| Elastic Modulus (E) | 200 | GPa | At 20 °C |
| Shear Modulus (G) | 80 | GPa | At 20 °C |
| Poisson's Ratio (ν) | 0.29 | — | Typical for carbon steel |
| Thermal Expansion Coefficient (α) | 12.0 | 10⁻⁶/°C | 20–100 °C range |
| Thermal Conductivity (λ) | 52 | W/(m·K) | At 20 °C |
| Specific Heat Capacity (Cp) | 486 | J/(kg·K) | Room temperature |
| Electrical Resistivity (ρe) | 0.15 | µΩ·m | At 20 °C |
ASTM A283 Grade C Carbon Steel Coil Mechanical Properties
Values are the minimum or range requirements per ASTM A283/A283M-18 for Grade C in the as-rolled condition. Tensile testing is performed transverse to the rolling direction. Bend test requirements are for cold bending through 180° without cracking. Impact testing is not a standard requirement unless specified in the order.
| Property | Specified Value | Unit | Test Condition |
|---|---|---|---|
| Yield Strength (ReH/Rp0.2) | 205 (30 ksi) minimum | MPa | Transverse, 0.2% offset, ambient |
| Tensile Strength (Rm) | 380–515 (55–75 ksi) | MPa | Transverse, ambient |
| Elongation (A) in 200 mm (8 in) | 25 min (thickness ≤ 20 mm) 24 min (20 < t ≤ 40 mm) 23 min (40 < t ≤ 50 mm) | % | Longitudinal, 200 mm gauge |
| Elongation (A) in 50 mm (2 in) | 22 min (thickness ≤ 20 mm) 21 min (20 < t ≤ 40 mm) 20 min (40 < t ≤ 50 mm) | % | Longitudinal, 50 mm gauge |
| Bend Test | No cracking on 180° bend Bend diameter = 1t (t ≤ 20 mm) Bend diameter = 1.5t (t > 20 mm) | — | Room temperature, transverse specimens |
| Charpy Impact (KV) | Not required (unless agreed by purchaser) | J | Optional supplementary requirement |
ASTM A283 Grade C Carbon Steel Coil Completely Equivalent Standards and Substitutable Grades
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| European Union | EN 10025-2 | S235JR (1.0038) | Minimum yield 235 MPa, tensile 360–510 MPa; slightly higher strength than A283 Gr. C, but widely interchangeable for structural applications |
| Japan | JIS G3101 | SS400 | Minimum yield 245 MPa, tensile 400–510 MPa; chemistry not tightly specified, mechanical property based |
| China | GB/T 700 | Q235B | Minimum yield 235 MPa, tensile 370–500 MPa; commonly used structural carbon steel |
| International | ISO 630-2 | S235B | Yield ≥ 235 MPa, tensile 360–510 MPa; similar to EN S235JR |
| India | IS 2062 | E250 (Fe 410W A / B) | Yield ≥ 250 MPa; often substituted where higher strength is acceptable |
ASTM A283 Grade C Carbon Steel Coil Application Introduction
ASTM A283 Grade C is designed for general structural purposes. It is easily fabricated and can be welded, bolted, or riveted. The steel is most often supplied as hot-rolled coil or cut sheet for applications where moderate strength and good ductility are required. It is not intended for pressure-containing components or fatigue-critical dynamically loaded members unless properly designed. Forming processes such as bending, shearing, and punching are readily performed. The material can also be hot-dip galvanized for corrosion protection.
Product Applications: Structural beams, columns, and channels (secondary members), Floor plates and checkered plates, Welded storage tanks and silos, Corrugated roofing and siding sheets, Agricultural implements (plows, cultivators), Trailer frames and chassis, Guardrails and highway components
Processed into products: Brackets and gussets, Machine bases and frames, Stamped and formed brackets, Pipe flanges (non-critical service), Bus body panels, Container parts, Shelving and racking systems, Support channels and angle clips
Application industries: Construction and civil engineering (building frames, bridges, transmission towers), Agricultural machinery and equipment, Storage tank fabrication (non-pressurized), Railway cars and automotive components, Furniture and appliance manufacturing, General sheet metal fabrication
ASTM A283 Grade C Carbon Steel Coil Similar or Alternative Material Recommendations
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| USA | ASTM A283/A283M | Grade D | Higher minimum yield (230 MPa) and tensile (415 MPa); otherwise similar chemistry, direct upgrade from Grade C |
| USA | ASTM A36/A36M | A36 | Yield ≥ 250 MPa, tensile 400–550 MPa; the most common structural steel, slightly higher strength than A283 Gr. C |
| USA | ASTM A1011/A1011M | SS Grade 36 (Type 1 or 2) | For sheet and strip; yield ≥ 250 MPa; similar forming and welding characteristics |
| European Union | EN 10025-2 | S275JR | Yield ≥ 275 MPa; higher strength alternative for structural sections |
| Japan | JIS G3106 | SM400A | Welded structural steel; yield ≥ 245 MPa, tensile 400–510 MPa; improved weldability over SS400 |
Notes:
- When impact toughness is required, supplementary requirements (e.g., Charpy V-notch) shall be agreed upon at the time of ordering.
- Coil products may be supplied with mill edge or slit edge; tolerances according to ASTM A568/A568M.
- Surface finish can be as-rolled, pickled and oiled, or blast cleaned — purchaser should specify.
- For welded structures, preheat may be needed for thicknesses above 25 mm; follow AWS D1.1 recommendations.
- Always verify suitability for seismic or low-temperature conditions by testing, as this grade is not inherently impact tested.
- Share
