ASTM A285 Grade A Pressure Vessel Carbon Steel Plate
ASTM A285 Grade A Pressure Vessel Carbon Steel Plate
Complete technical data for ASTM A285/A285M Grade A steel includes chemical composition, mechanical properties, physical characteristics, equivalent standards, and application recommendations.
Welding, forming, machining, hot/cold working
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ASTM A285 Grade A Pressure Vessel Carbon Steel Plate Introduction
ASTM A285 Grade A is a carbon steel specification for pressure vessel plates in low- and intermediate-tensile strength applications, covered under ASTM A285/A285M. This material is not a weathering steel but offers reliable weldability and formability for fabrication of boilers, storage tanks, and moderate-pressure vessels. Typical thickness up to 50 mm is covered. The steel is available in as-rolled or normalized condition. Key features:
- Good weldability
- Suitable for moderate temperature and pressure
- Economical for general service
ASTM A285 Grade A Pressure Vessel Carbon Steel Plate Chemical Composition
Chemical requirements per ASTM A285/A285M standard for Grade A. Values are maximum unless otherwise noted.
| Element | Content | Remarks |
|---|---|---|
| Carbon (C) | 0.17 max | |
| Manganese (Mn) | 0.90 max | |
| Phosphorus (P) | 0.025 max | |
| Sulfur (S) | 0.025 max | |
| Silicon (Si) | Not specified | Typically 0.15–0.40 % for killed or semi-killed steel |
ASTM A285 Grade A Pressure Vessel Carbon Steel Plate Physical Properties
Typical physical properties at ambient temperature for carbon steel similar to ASTM A285 Grade A. These are reference values and are not standardised requirements.
| Property | Typical Value | Unit | Conditions |
|---|---|---|---|
| Density (ρ) | 7.85 | g/cm³ | 20 °C |
| Elastic Modulus (E) | 200 | GPa | 20 °C |
| Shear Modulus (G) | 80 | GPa | Estimated from E and ν |
| Poisson's Ratio (ν) | 0.3 | — | 20 °C |
| Thermal Expansion Coef. (α) | 11.7 | 10⁻⁶/K | 20–100 °C |
| Thermal Conductivity (λ) | 51.9 | W/(m·K) | 20 °C |
| Specific Heat Capacity (cp) | 486 | J/(kg·K) | 20 °C |
| Electrical Resistivity (ρe) | 0.15 | µΩ·m | 20 °C |
ASTM A285 Grade A Pressure Vessel Carbon Steel Plate Mechanical Properties
Tensile and elongation requirements per ASTM A285/A285M for Grade A at room temperature. Values vary with plate thickness. No Charpy V-notch impact test is specified; this grade is not intended for low-temperature service.
| Property | Value | Unit | Test Conditions |
|---|---|---|---|
| Tensile Strength (Rm) | 310 – 450 | MPa | Room temperature |
| Yield Strength (ReH) min | 165 | MPa | Room temperature, 0.2% offset |
| Elongation (A) min | 27 | % | Gauge length 200 mm, thickness ≤ 19 mm |
| Elongation (A) min | 25 | % | Gauge length 200 mm, thickness >19 to 38 mm |
| Elongation (A) min | 24 | % | Gauge length 200 mm, thickness >38 to 50 mm |
ASTM A285 Grade A Pressure Vessel Carbon Steel Plate Direct Equivalent Materials
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| USA | ASME SA285/SA285M | Grade A | Identical to ASTM A285 Grade A; for pressure vessels under ASME BPVC |
| — | — | — | No direct ISO equivalent; see similar materials for alternatives |
ASTM A285 Grade A Pressure Vessel Carbon Steel Plate Application Introduction
Typical applications:
- Pressure vessel shells and heads for air receivers, storage tanks, and low-pressure boilers
- General structural components in moderate-temperature service
- Fabricated parts where formability and weldability are essential
Product Applications: Pressure vessels, Storage tanks, Boilers, Heat exchangers (low-pressure, moderate temperature), Structural components in non-critical service
Processed into products: Shells (cylindrical, spherical), Dished heads, Flanges, Pipe caps, Baffles, Manways, Stiffeners
Application industries: Oil & Gas, Chemical Processing, Power Generation, Water Treatment, Industrial Machinery
ASTM A285 Grade A Pressure Vessel Carbon Steel Plate Similar or Alternative Materials
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| USA | ASTM A285/A285M | Grade B / C | Higher strength grades of same specification |
| USA | ASTM A516/A516M | Grade 55/60/65/70 | Pressure vessel plates with improved notch toughness for moderate and lower temperatures |
| USA | ASTM A36/A36M | — | Common structural carbon steel; not intended for pressure vessel service but sometimes used for similar low-pressure applications |
| EU | EN 10028-2 | P235GH | Similar pressure vessel steel; minimum yield 235 MPa, tensile 350–480 MPa; may be substituted with adjusted design parameters |
| Japan | JIS G3103 | SB410 | Boiler steel; tensile strength min 410 MPa, suitable for similar applications but stronger |
Notes:
Important: Despite the query description as "Weather Resistant Steel Coil", ASTM A285 Grade A is not a weather-resistant (atmospheric corrosion-resistant) steel. It is a carbon steel for pressure vessels. If atmospheric corrosion resistance is required, consider weathering steel grades such as ASTM A588 or ASTM A606. Additionally, while the product form is typically plate, coil form may be used for thinner material (sheet) but certification as a pressure vessel plate requires compliance with the full plate standard. Consult the standard for plate thickness limits.
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