ASTM A299 Grade A (A299GRA) Pressure Vessel & Boiler Steel Plate
ASTM A299 Grade A (A299GRA) Pressure Vessel & Boiler Steel Plate
Complete material data for ASTM A299 Grade A carbon-manganese-silicon steel plate used in welded pressure vessels and boilers. Includes chemical composition, mechanical properties, physical properties, and international equivalents.
Hot rolling, controlled rolling, normalizing, normalizing and tempering, or quenching and tempering (as agreed)
- Phone : +8618037372205
- Email : [email protected]
- WhatsApp: Contact via Whtsapp
- WeChat: +8618037372205
ASTM A299 Grade A Pressure Vessel & Boiler Steel Plate Introduction
ASTM A299 Grade A (also designated A299GRA) is a hot-rolled carbon-manganese-silicon steel plate primarily intended for welded boilers and pressure vessels. It offers a good combination of strength, notch toughness, and weldability, making it suitable for moderate and elevated temperature service.
- Thickness range typically up to 4 in. (100 mm)
- Two strength levels: Grade A and Grade B
- Often supplied in normalized condition for improved toughness
- Can be supplemented with Charpy V-notch impact testing per ASTM A20
ASTM A299 Grade A Pressure Vessel & Boiler Steel Plate Chemical Composition
Chemical composition limits according to ASTM A299/A299M. Values vary with plate thickness. All elements are reported per heat analysis.
| Element | Required Value (wt%) | Remarks |
|---|---|---|
| C | ≤0.28 | For thickness ≤1 in. (25 mm) |
| C | ≤0.30 | For thickness >1 in. to 2 in. (25–50 mm) |
| C | ≤0.31 | For thickness >2 in. to 4 in. (50–100 mm) |
| Mn | 0.90–1.50 | All thicknesses up to 4 in. (100 mm) |
| P | ≤0.035 | |
| S | ≤0.035 | |
| Si | 0.15–0.40 | Unless otherwise agreed |
ASTM A299 Grade A Pressure Vessel & Boiler Steel Plate Thermal and Electrical Physical Properties
Typical physical properties for ASTM A299 Grade A steel at ambient and elevated temperatures. These values are approximate and provided for design guidance, not as specification requirements.
| Property | Typical Value | Unit | Conditions |
|---|---|---|---|
| Density (ρ) | 7.85 | g/cm³ | 20°C |
| Modulus of Elasticity (E) | 200 | GPa | 20°C |
| Shear Modulus (G) | 80 | GPa | 20°C (estimated) |
| Poisson's Ratio (ν) | 0.3 | — | 20°C |
| Thermal Expansion Coefficient (α) | 11.7 | 10⁻⁶/°C | 20–100°C |
| Thermal Expansion Coefficient (α) | 12.5 | 10⁻⁶/°C | 20–200°C |
| Thermal Conductivity (λ) | 52 | W/(m·K) | 100°C |
| Specific Heat Capacity (cp) | 460 | J/(kg·K) | 20°C |
| Electrical Resistivity (ρe) | 0.17 | µΩ·m | 20°C |
ASTM A299 Grade A Pressure Vessel & Boiler Steel Plate Mechanical Properties
Tensile property requirements per ASTM A299/A299M. Values depend on plate thickness. Testing is performed at room temperature using standard specimens.
| Property | Required Value | Unit | Test Condition / Thickness |
|---|---|---|---|
| Yield Strength (ReH), min | 40 (275) | ksi (MPa) | Thickness ≤2 in. (50 mm) |
| Yield Strength (ReH), min | 38 (260) | ksi (MPa) | Thickness >2 in. to 4 in. (50–100 mm) |
| Tensile Strength (Rm) | 75–95 (515–655) | ksi (MPa) | Thickness ≤2 in. (50 mm) |
| Tensile Strength (Rm) | 70–90 (485–620) | ksi (MPa) | Thickness >2 in. to 4 in. (50–100 mm) |
| Elongation (A) in 8 in. (200 mm), min | 19 | % | Thickness ≤2 in. (50 mm) |
| Elongation (A) in 8 in. (200 mm), min | 16 | % | Thickness >2 in. to 4 in. (50–100 mm) |
ASTM A299 Grade A Pressure Vessel & Boiler Steel Plate Fully Equivalent Material Standards and Substitutable Grades
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| USA | ASTM A299/A299M | A299 Grade A | Original specification |
| USA | ASME SA-299/SA-299M | SA299 Grade A | Identical to ASTM A299 for ASME pressure vessel applications |
ASTM A299 Grade A Pressure Vessel & Boiler Steel Plate Application Introduction
ASTM A299 Grade A is designed for moderate- and elevated-temperature pressure-containing equipment. Its controlled chemistry provides good weldability and reliable mechanical properties after fabrication. Common uses are listed below.
Product Applications: Welded pressure vessels, Industrial boilers and steam drums, Atmospheric and pressurized storage tanks, Shell-and-tube heat exchangers, Process reactors and columns
Processed into products: Cylindrical shells and courses, Elliptical, hemispherical, and torispherical heads, Dished ends, Tube sheets (when normalized), Body flanges and bolted covers, Baffles and support plates, Nozzle reinforcements
Application industries: Oil & Gas (downstream and midstream), Petrochemical processing, Power generation (boilers, steam drums), Chemical plants, Industrial boiler manufacturing, Heat exchanger fabricators
ASTM A299 Grade A Pressure Vessel & Boiler Steel Plate Similar or Substitute Materials for Comparison
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| EU | EN 10028-2 | P295GH | Similar C-Mn steel for pressure vessels; lower carbon for improved weldability. Verify design codes and service conditions. |
| EU (superseded) | DIN 17155 | 17Mn4 | Historical German boiler plate grade; comparable tensile range but superseded by P295GH. |
| Japan | JIS G3115 | SPV315 | Manganese-silicon steel for pressure vessels; tensile properties align closely. Check toughness requirements. |
| China | GB/T 713 | Q345R | Higher yield strength and lower carbon content; may be substituted with engineering assessment. |
| International | ISO 9328-2 | P295GH | International equivalent to EN P295GH; used in pressure equipment. |
Notes:
- Plates are typically supplied with ASTM A20/A20M general requirements, which cover tolerances, testing, and certification.
- Supplementary requirements such as Charpy V-notch impact testing (S5), ultrasonic examination (S11), or simulated post-weld heat treatment may be specified.
- The steel can be ordered with restricted chemistry for improved HIC/SSC resistance when required for sour service.
- Maximum thickness under this standard is normally 4 in. (100 mm); thicker plates require agreement.
- Share
