SA533 | A533 | Low Carbon Steel | Pressure Vessel Steel
SA533 | A533 | Low Carbon Steel | Pressure Vessel Steel
SA533 is a low alloy steel plate primarily used for pressure vessels and boilers. It adheres to the ASTM standard. The “SA” stands for ASME specification, and the “533” indicates the specific grade. Equivalent grades include A533 (ASTM) and P295GH (EN). SA533 features high strength, excellent notch toughness, and good weldability. It is considered nuclear-grade steel, commonly used in the nuclear industry and for fabricating reactors and other heavy-duty components.
Description
Chemical Compositions
| Element | Content (%) |
|---|---|
| Carbon, C | 0.10 – 0.20 |
| Manganese, Mn | 1.15 – 1.50 |
| Phosphorus, P | ≤0.025 |
| Sulfur, S | ≤0.025 |
| Silicon, Si | 0.15 – 0.50 |
| Nickel, Ni | 0.40 – 1.00 |
| Chromium, Cr | ≤0.30 |
| Molybdenum, Mo | 0.10 – 0.60 |
| Vanadium, V | ≤0.30 |
| Copper, Cu | ≤0.35 |
Physical Properties
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm³ | 0.284 lb/in³ |
| Melting Point | 1371 – 1533°C | 2500 – 2791°F |
| Boiling Point | – | – |
| Thermal Conductivity | 31.2 – 44.3 W/m·°C | 21.6 – 30.7 BTU/h·ft·°F |
| Electrical Conductivity | – | – |
| Specific Heat Capacity | 460 J/kg·°C | 0.11 BTU/lb·°F |
| Thermal Expansion Coefficient | 11.2 – 12.3 x 10⁻⁶ /°C | 6.2 – 6.8 x 10⁻⁶ /°F |
| Electrical Resistivity | 423 – 432 nΩ·m | 423 – 432 nΩ·m |
Mechanical Properties
AC (Air Cooled) Sate
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength | 485 – 620 MPa | 70 – 90 ksi |
| Yield Strength | 280 – 345 MPa | 41 – 50 ksi |
| Brinell Hardness | 135 – 175 HB | 135 – 175 HB |
| Rockwell Hardness | 85 – 95 HRB | 85 – 95 HRB |
| Vickers Hardness | 140 – 190 HV | 140 – 190 HV |
| Elongation | 18 – 22% | 18 – 22% |
| Elastic Modulus | 200 GPa | 29 msi |
Industries & Applications
| Industry | Specific Products |
|---|---|
| Nuclear Power Generation | Reactor Pressure Vessels, Steam Generators, Containment Structures, Pressurizer Components |
| Oil and Gas | Heat Exchangers, Pressure Vessels, Reactors, Storage Tanks |
| Chemical Processing | Distillation Columns, Chemical Reactors, Heat Exchangers, Pressure Vessels |
| Aerospace | Engine Mounts, Fuselage Components, Structural Supports, Landing Gear |
| Marine | Submarine Hulls, Offshore Platforms, Ship Structures, Pressure Hulls |
| Construction | Heavy Machinery Frames, Structural Columns, Bridge Components, Crane Components |
| Military | Armored Vehicles, Missile Tubes, Defense Structures, Tank Components |
| Power Plants | Turbine Housings, Boilers, Pressure Vessels, Piping Systems |
| Automotive | Chassis Components, Engine Blocks, Suspension Parts, Transmission Cases |
Machining
Heat Treatment
- Normalizing: Heat to 1650°F (900°C) to 1750°F (955°C), hold to achieve uniform temperature, then cool in air.
- Quenching: Reheat to 1550°F (845°C) to 1650°F (900°C), hold to ensure uniform heating, then quench in water or oil as required.
- Tempering: Reheat to 1100°F (595°C) to 1300°F (705°C), hold for at least 1 hour per inch (25.4 mm) of thickness, then cool in air.
- Stress Relieving (if needed): Heat to 1100°F (595°C) to 1300°F (705°C), hold for at least 1 hour per inch (25.4 mm) of thickness, then cool in air.
Surface Finish
- Machining: Turning, milling, drilling, and grinding for precise parts and shapes.
- Heat Treatment: Normalizing, quenching, and tempering to improve properties.
- Sandblasting: Removes scale and contaminants using high-pressure abrasives.
- Pickling: Acidic solution to remove oxides and impurities.
- Electroplating: Coats with metal (nickel, chromium, zinc) for corrosion resistance.
- Coating: Protective paint or anti-corrosion layer for weather resistance.
- Polishing: Achieves high surface finish and gloss.
- Ultrasonic Cleaning: Removes dirt and grease with ultrasonic vibrations.
*Customization is available upon request.
Disclaimer
The provided heat treatment and surface treatment processes are general guidelines. Actual conditions may vary depending on specific applications and requirements. It is recommended to consult with a professional metallurgist or material scientist to tailor the processes to your particular needs. The information herein is not a substitute for professional advice and should not be relied upon as such.
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