Find out the latest hot-rolled steel plate inventory specifications and sizes.
ASTM A537 Class 1 / 2 / 3 Pressure Vessel / Boiler Steel Steel Plate
| Material Standard | Width |
| ASTM A537 Class 1 / 2 / 3 Steel Steel Plate |
1,500 mm – 3,500 mm (59″ – 138″) |
| Thickness | Length |
| 6 mm – 200 mm (0.24″ – 8″) | 3,000 mm – 18,000 mm (118″ – 709″) |
| Dimensional Tolerance | Quality Certification |
| Thickness: ±0.15 mm – ±0.30 mm, Width: ±3 mm – ±10 mm | ISO 9001:2015, SGS / BV / Intertek Third-Party Inspection Report |
| Surface Finish | Applications |
| Hot rolled, pickled, oiled; optional anti-rust coating | Construction, bridges, pressure vessels, structural steel |
ASTM A537 Class 1 / 2 / 3 – Chemical Composition (Hot Rolled Steel Plate)
| Element | Requirement | Unit |
| Carbon (C) | ≤ 0.24 | % |
| Manganese (Mn) | 0.70 – 1.60 | % |
| Phosphorus (P) | ≤ 0.035 | % |
| Sulfur (S) | ≤ 0.035 | % |
| Silicon (Si) | 0.15 – 0.40 | % |
| Copper (Cu) | ≤ 0.35 | % |
| Nickel (Ni) | ≤ 0.25 | % |
| Chromium (Cr) | ≤ 0.25 | % |
| Molybdenum (Mo) | ≤ 0.08 | % |
| Vanadium (V) | ≤ 0.08 | % |
| Niobium (Nb) | ≤ 0.05 | % |
Key Notes
Chemical composition limits are essentially the same for Class 1, 2, and 3; the primary difference lies in heat treatment (normalized vs. quenched & tempered).
Low carbon content ensures good weldability and toughness.
Mn and Si improve strength and deoxidation.
Optional alloying elements enhance strength and notch toughness when required.
ASTM A537 Class 1 / 2 / 3 – Mechanical Properties (Hot Rolled Steel Plate)
| Class | Heat Treatment | Yield Strength | Tensile Strength | Elongation (in 200 mm / 8") |
| Class 1 | Normalized | ≥ 345 MPa (50 ksi) | 485 – 620 MPa (70 – 90 ksi) | ≥ 18% |
| Class 2 | Quenched & Tempered | ≥ 415 MPa (60 ksi) | 550 – 690 MPa (80 – 100 ksi) | ≥ 18% |
| Class 3 | Quenched & Tempered | ≥ 450 MPa (65 ksi) | 620 – 760 MPa (90 – 110 ksi) | ≥ 18% |
Notes:
- Hot rolled plate ensures uniform thickness and good surface quality.
- Suitable for structural, construction, fabrication, and industrial applications.
- Weldable and formable, making it versatile for engineering projects.
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Pressure Vessels
Applicable to the construction of pressure vessels subjected to the moderate to high pressure, such as reactors, separators and storage tanks.
Boilers and Heat Exchangers
Frequently used in boiler drums, shells and headers of heat exchangers where high strength and good notch toughness are required.
Petrochemical and Refinery Equipment
Good Choice for Oil, Gas and Chemical Process Plant..etc, Vessel and Equipment.
Electrical Power Equipment
Used In Thermal Power Plant Boilers, Steam Drums and Turbine Auxiliary Pressure Retaining Parts.
Industrial Process Equipment
Pressure-retaining parts for industrial machinery where strength, weldability, and reliability are paramount.
Application by Class
Normalised plates for pressure vessels and boilers, Class 1.
Grades from Classes 2 & 3 Quenched and tempered plate for even higher pressure and more severe service.
1) Branch Office - Spanish-speaking support, customs clearance assistance, etc.
2) Over 5,000 tons of stock in stock, with a wide variety of sizes
3) Inspected by authoritative organizations such as CCIC, SGS, BV, and TUV, with standard seaworthy packaging
1️⃣ Bulk Cargo
works for large shipments. The plates are loaded directly onto ships or stacked with anti-slip pads between the base and the plate, wooden wedges or metal wires between plates and surface protection with rain-proof sheets or oil for rust prevention.
Pros: High payload, low cost.
Note: Specialized lifting gear is needed and condensation and surface damage must be avoided during haulage.
2️⃣ Containerized Cargo
Good for medium to small shipments. The plates are packed one by one with waterproofing and anti-rust treatment; a desiccant can be added in the container.
Advantages: Provides superior protection, easy to handle.
Drawbacks: Higher cost, decreased container loading volume.
Stable cooperation with shipping companies such as MSK, MSC, COSCO efficiently logistics service chain, logistics service chain are we to your satisfaction.
We follow the standards of quality management system ISO9001 in all procedure, and have strict control from packaging material purchase to transport vehicle scheduling. This guarantees the H-beams from the factory all the way to the project site, helping you build on a solid foundation for a trouble free project!
Contact Details
Address
Kangsheng development industry zone,
Wuqing district, Tianjin city, China.
Phone
Hours
Monday-Sunday: 24-hour Service
