ASME SA36 Carbon Steel Coil
ASME SA36 Carbon Steel Coil: Properties, Equivalents, and Applications
Comprehensive material data for ASME SA36/SA36M carbon and low-alloy high-strength steel coil, including chemical composition, mechanical and physical properties, international equivalents, and application guidelines.
Hot rolling, cutting, forming, welding, machining, punching
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ASME SA36 Carbon Steel Coil Introduction
ASME SA36/SA36M (SA36) is a carbon structural steel grade specified for pressure vessel and general structural applications. It is essentially the ASME Boiler and Pressure Vessel Code counterpart of the widely used ASTM A36. SA36 offers good weldability, machinability, and adequate strength for many construction and engineering uses. The material is typically supplied in the hot-rolled condition with a minimum yield strength of 250 MPa (36 ksi) and tensile strength between 400–550 MPa (58–80 ksi). Its balanced composition ensures reliable performance in riveted, bolted, or welded structures. The steel can be formed, punched, and drilled, making it versatile for plates, bars, and structural shapes. While originally a plain carbon grade, it may also be produced to meet low-alloy high-strength requirements under certain supplementary specifications.
ASME SA36 Carbon Steel Coil Chemical Composition
The chemical composition of SA36 is controlled to provide good weldability and structural integrity. Values are maximum unless a range is shown. Copper is optional and may be specified for improved atmospheric corrosion resistance. The elements listed are based on ASME SA36/SA36M heat analysis requirements.
| Chemical Element | Standard Value (%) | Remarks |
|---|---|---|
| Carbon (C) | ≤ 0.26 | Max for thickness ≤ 20 mm |
| Manganese (Mn) | 0.60 – 0.90 | For thickness ≤ 20 mm; 0.80–1.20 for > 20 mm |
| Phosphorus (P) | ≤ 0.04 | Max |
| Sulfur (S) | ≤ 0.05 | Max |
| Silicon (Si) | ≤ 0.40 | Max; may be 0.15–0.30 for certain products |
| Copper (Cu) | ≥ 0.20 (if specified) | Optional: min when copper steel is ordered |
| Iron (Fe) | Balance | Remainder |
ASME SA36 Carbon Steel Coil Thermal and Electrical Physical Properties
Physical properties are representative for carbon steel and are not part of the mandatory specification. They are provided for engineering calculations. Values may vary slightly with exact composition and temperature.
| Property | Typical Value | Unit | Test Condition |
|---|---|---|---|
| Density (ρ) | 7.85 | g/cm³ | Ambient temperature |
| Modulus of Elasticity (E) | 200 | GPa | Tension, room temperature |
| Shear Modulus (G) | 79.3 | GPa | Calculated from E and ν |
| Poisson's Ratio (ν) | 0.26 | - | Room temperature |
| Thermal Expansion Coefficient (α) | 11.7 | 10⁻⁶/K | 0–100 °C range |
| Thermal Conductivity (λ) | 45 | W/m·K | At 20 °C |
| Specific Heat Capacity (cp) | 470 | J/kg·K | At 20 °C |
| Electrical Resistivity (ρ_e) | 0.15 | µΩ·m | At 20 °C |
ASME SA36 Carbon Steel Coil Mechanical Properties
Mechanical properties are determined on test samples taken from the coil or plate in the as-rolled delivery condition. Requirements vary with product thickness. The values below conform to ASME SA36/SA36M base specification. Impact testing is not mandatory unless specified by supplementary requirements.
| Property | Required Value | Unit | Test Condition / Remark |
|---|---|---|---|
| Yield Strength (ReH) | ≥ 250 (36 ksi) | MPa | Thickness ≤ 200 mm |
| Tensile Strength (Rm) | 400 – 550 (58 – 80 ksi) | MPa | All thicknesses |
| Elongation (A) in 200 mm (8 in.) | ≥ 20 | % | Thickness ≤ 200 mm, plate specimens |
| Elongation (A) in 50 mm (2 in.) | ≥ 23 | % | For plates, bars, and shapes |
| Bend Test (bend diameter) | 180° flatwise | - | Diameter as specified by standard; no cracks on outside of bent portion |
| Impact Energy (KV) – optional | Consult supplementary requirements | J | Otherwise not required |
ASME SA36 Carbon Steel Coil Fully Equivalent Material Standards and Substitutable Grades
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| USA | ASTM A36/A36M | A36 | Direct equivalent; SA36 is the ASME pressure vessel code adoption of A36 |
| European Union | EN 10025-2 | S275JR | Comparable structural carbon steel; minor differences in impact properties |
| Japan | JIS G3101 | SS400 | Similar yield and tensile strength; chemical composition not identical but often interchangeable |
| China | GB/T 700 | Q235B | Equivalent structural carbon steel; widely used in construction |
| International | ISO 630-2 | E235B | ISO standard for structural steels, Fe 360B designation |
ASME SA36 Carbon Steel Coil Application Introduction
SA36 steel coil and its derivatives are versatile materials suitable for numerous structural and industrial products. The combination of moderate strength, excellent weldability, and low cost makes it a backbone material in construction and manufacturing. Care should be taken when the steel is used in dynamic loading or low-temperature conditions, where supplementary impact testing may be required.
Product Applications: Steel frames for buildings, Bridge girders and structural supports, Pressure vessels and storage tanks (non-cyclic service), Trailers, truck frames, and railcars, Agricultural and mining equipment, Transmission towers and lighting poles
Processed into products: Base plates, gusset plates, and stiffeners, Welded brackets and mounting pads, Flanges and non-critical pressure parts, Structural beams (I-beams, channels, angles) from rolled shapes, Pipe supports and hangers, Anchors and embedment plates
Application industries: Civil engineering and construction, Pressure vessel and tank fabrication, Shipbuilding and offshore structures, Railway and automotive components, General machinery and equipment manufacturing
ASME SA36 Carbon Steel Coil Similar / Alternative Material Recommendations
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| USA | AISI/SAE | 1020 | Higher carbon, higher strength; may require preheat for welding |
| European Union | EN 10025-2 | S235JR | Lower yield strength (235 MPa) but good weldability; cost-effective alternative |
| Japan | JIS G3106 | SM400A | Welding structural steel with similar tensile range; often used where notch toughness is specified |
| China | GB/T 700 | Q195 | Lower strength; suitable for less demanding applications |
| International | ISO 630-2 | E295B | Higher strength grade; used when higher yield is needed |
Notes:
- SA36 is not intended for high-temperature service above ambient design temperatures unless additional requirements are invoked.
- When specifying copper-bearing steel (≥0.20% Cu), improved atmospheric corrosion resistance is obtained.
- Supplementary requirements (e.g., S5 for Charpy V-notch impact testing) may be added to the purchase order to obtain guaranteed toughness.
- The standard allows both rimmed and killed steel practices; for thicker sections or where improved internal soundness is desired, killed steel is recommended.
- For non-structural applications where surface appearance is critical, hot-rolled SA36 may be pickled and oiled.
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