astm a537 class 3 (a537 cl.3) steel plates supplier

ASTM A537 Class 3 (A537 Cl.3) Steel Plates Supplier

In the high-demand sector of pressure vessel and boiler production, finding a dependable supplier for advanced materials is key to achieving structural integrity and operational efficiency.

At Gangsteel, we stand as a top-tier supplier of ASTM A537 Cl 3 steel plates, a quenched and tempered carbon-manganese-silicon steel under the ASTM A537/A537M standard.

This grade, equivalent to ASME SA 537 Class 3, provides intermediate strength and toughness for applications in oil and gas, petrochemicals, and energy sectors.

Gangsteel delivers certified plates that excel in moderate-pressure environments with good formability.

For comparisons, review our ASTM A537 Cl 1 steel plate for lower strength or ASTM A537 Cl 2 steel plate for higher demands.

What is ASTM A537 Class 3 (A537 Cl.3) Steel Plates?

As your reliable supplier, Gangsteel offers ASTM A537 Cl 3 steel plates tailored for welded pressure vessels requiring balanced properties between Class 1 and 2.

This grade undergoes quenching and tempering—rapid cooling after heating, followed by controlled reheating—to optimize hardness and ductility for services with moderate temperatures and pressures.

It’s compliant with ASME SA537/SA537M steel plate standards, ideal for sour gas resistance when HIC-tested.

At Gangsteel, we source and process plates for boiler heads, storage spheres, and separators, allowing efficient designs in challenging conditions.

Compared to ASME SA 537 Class 1, it provides enhanced yield for cost savings in intermediate applications.

Chemical Composition of ASTM A537 Class 3

The composition focuses on controlled carbon for weldability and manganese for strength adjustment by thickness.

In astm a537 class 3 boiler steel chemical composition details, low impurities ensure durability, with silicon for deoxidation.

Optional alloys like nickel improve low-temperature performance if specified.

Composition table:

This mirrors Classes 1 and 2 but supports intermediate heat treatment benefits.

Mechanical Properties of ASTM A537 Class 3

A537 Class 3 offers solid properties for versatile use, with yield varying by thickness.

Per a537 cl.3 mechanical properties and density guide, it balances strength for moderate vessels.

Properties table:

Table 1

This ensures reliability in dynamic loads.

Density and Delivery Condition

Density aligns with a537 cl.3 mechanical properties and density guide at 7.85 g/cm³ (7850 kg/m³).

Plates are delivered quenched and tempered, with Gangsteel providing options like impact testing and PWHT simulation.

Available Specifications and Models

Gangsteel manufactures A537 Class 3 in flexible dimensions to suit various project requirements:

• Thickness: 6mm to 150mm
• Width: 1500mm to 3500mm
• Length: 3000mm to 18000mm
• Specifications: Compliant with ASTM A537 Class 3 and ASME SA537 Class 3; custom beveling, edge preparation, and ultrasonic testing available upon request.

We also offer value-added models with HIC resistance or Z-direction properties for thick sections, ensuring no issues during fabrication.

Pricing Insights for ASTM A537 Class 3

As of September 29, 2025, current pricing for astm a537 class 3 pressure vessel plates ranges $800-2,800 per metric ton.

Standard plates (20-50mm) average $900-1,500/ton, with premiums for customized or tested options.

In Asia, prices start at $850/ton; Europe/NA at $1,600-2,500.

Gangsteel quotes from $900/ton for bulk, influenced by alloy costs and market demand.

Equivalent Materials for ASTM A537 Class 3

Equivalents facilitate international projects with similar properties.

From the USA, ASME SA537 Class 3 is direct.

In the European Union, EN 10028-3 P420NH offers comparable quenched and tempered fine-grain structure.

Germany's DIN 17102 WStE355 provides matching toughness for welded vessels.

Japan's JIS G3115 SPV450 is a high-strength boiler equivalent with good weldability.

The UK's BS EN 10028-3 P420NH aligns for elevated temperature service.

China's GB 713 14Cr1MoR matches in heat-resistant alloying.

Korea's KS D 3560 SPV450 offers parallel mechanicals for tanks.

France's AFNOR 15CD4-05 provides equivalent composition for pressure equipment.

India's IS 2002 Gr.2 is similar for boiler plates.

Australia's AS 1548 PT430N shares normalized/Q&T options.

Table:

These, per astm a537 class 3 pressure vessel steel equivalents, require code verification.

Applications and Advantages in Boiler Systems

A537 Class 3 suits intermediate boilers, chemical tanks, and gas separators.

It resists moderate corrosion, supports efficient welding, and allows balanced designs for cost savings.

In power generation, it handles steam pressures; in refining, mild corrosives.

Advantages include creep resistance, reducing failures in cyclic operations.

Frequently Asked Questions (FAQs) About ASTM A537 Class 3 Steel Plates

What is ASTM A537 Class 3 material?

ASTM A537 Class 3 is a quenched and tempered carbon-manganese-silicon steel plate for pressure vessels, offering intermediate strength (yield 55 ksi min) between Classes 1 and 2. Heat-treated for balanced toughness, it's ideal for moderate-temperature services, with tensile 75-95 ksi and elongation 22% min. Equivalent to ASME SA537 Class 3, it's used in boilers and tanks, providing HIC resistance for sour environments when tested.

What is the difference between A537 Class 2 and Class 3?

A537 Class 2 has higher yield (60 ksi min) for demanding high-pressure services, while Class 3 offers lower yield (55 ksi min) but better formability for moderate applications. Both are quenched/tempered, but Class 3 suits intermediate needs with tensile 75-95 ksi vs Class 2's 80-100 ksi. Class 3 is cost-effective for less extreme conditions, with similar welding but potentially easier fabrication.

What applications suit A537 Class 3 plates?

A537 Class 3 is suitable for moderate-pressure boilers, chemical storage tanks, and gas processing vessels. It's used in power plants for steam components, petrochemicals for reactors, and oil/gas for separators. Its toughness fits low to moderate temp services, with HIC testing for corrosives, making it versatile for balanced designs extending lifespan in cyclic loads.

Is A537 Class 3 equivalent to SA537 Class 3?

Yes, A537 Class 3 is equivalent to ASME SA537 Class 3, with identical composition (carbon 0.24% max) and properties (yield 55 ksi min). ASTM A537 is material-focused, SA537 for ASME codes like Section VIII. Equivalents include EN P420NH and JIS SPV450; verify for projects.

What thickness ranges are available for A537 Class 3 plates?

A537 Class 3 ranges from 6mm to 150mm thick, with properties adjusting: yield 55 ksi (≤65mm), 50 ksi (65-100mm), 40 ksi (100-150mm). Gangsteel offers widths to 3500mm and lengths to 18000mm, with custom cuts. Thicker plates suit heavy vessels, with Z-testing available.

Does A537 Class 3 require impact testing?

Yes, Charpy V-notch testing is common, at -20°C or lower, ensuring 27J min energy for fracture resistance. Essential for low-temp or sour services, Gangsteel provides tested plates compliant with API 934.

Can A537 Class 3 be used in sour service?

Yes, with HIC/SCC testing per NACE TM0284/TM0177, its low sulfur minimizes cracking. Certified to NACE MR0175/ISO 15156, it's suitable for oil scrubbers. Gangsteel offers variants with enhanced purity for aggressive media.

In summary, ASTM A537 Class 3 (A537 Cl.3) steel plates from Gangsteel offer balanced strength and toughness for moderate applications, with customizable specs and reliable performance. As your trusted supplier, we provide competitive pricing and global delivery—reach out for quotes on ASTM A537 Cl 3 steel plates to support your next project.

astm a537 class 3 boiler steel chemical composition details, a537 cl.3 mechanical properties and density guide, current pricing for astm a537 class 3 pressure vessel plates