What material is SA 537 cl1?

In the critical field of pressure vessel and boiler manufacturing, understanding specific material grades is essential for ensuring safety, performance, and compliance with industry standards.

At Gangsteel, we specialize in producing and exporting high-quality steel plates, including ASME SA537 Cl.1 (commonly known as SA 537 Cl1), a normalized carbon-manganese-silicon steel under the ASME SA537/SA537M standard.

This material, equivalent to ASTM A537 Class 1, is engineered for welded applications in moderate-temperature environments, offering excellent toughness and weldability for industries like oil and gas, petrochemicals, and power generation.

Gangsteel ensures our plates meet stringent requirements for global delivery.

If comparing, explore our ASME SA 537 Class 1 for detailed specs or ASME SA 537 Class 2 for higher strength needs.

What is SA 537 Cl1 Material?

SA 537 Cl1 material is a heat-treated carbon-manganese-silicon steel plate specification designed for use in fusion-welded pressure vessels and boilers, where moderate strength and good notch toughness are required.

It falls under ASME SA537 Class 1, with the "Cl1" denoting Class 1, a normalized grade that involves heating the steel to approximately 900°C followed by air cooling to refine the grain structure and improve uniformity.

This process enhances its resistance to brittle failure, making it suitable for services at temperatures as low as -20°C and pressures up to 100 bar.

The material is often used in sour gas environments, compliant with NACE MR0175 when HIC-tested, and is ideal for fabricating boiler drums, storage tanks, and heat exchangers.

Unlike quenched and tempered grades like Class 2, SA 537 Cl1 prioritizes balanced properties for standard applications, allowing for easier welding and forming without extensive preheating.

At Gangsteel, we produce SA 537 Cl1 for clients needing reliable, cost-effective solutions in moderate-pressure setups.

Chemical Composition of SA 537 Cl1 Material

The chemical composition of SA 537 Cl1 is optimized for weldability and corrosion resistance, with low carbon to minimize cracking and manganese to enhance strength.

In asme sa537 class 1 boiler steel chemical composition details, silicon aids in deoxidation, while phosphorus and sulfur are strictly limited to prevent embrittlement.

Optional elements like copper, nickel, chromium, and molybdenum can be specified for added resistance in corrosive environments.

Composition table:

This balanced formula ensures the material's suitability for standard pressure vessel use.

Mechanical Properties of SA 537 Cl1 Material

SA 537 Cl1 offers solid mechanical properties for load-bearing in moderate conditions, with yield strength adjusting by thickness for consistency.

Per sa 537 cl.1 mechanical properties and density guide, it provides good elongation for forming and impact resistance for low-temperature services.

Charpy V-notch testing is often required to verify toughness, typically achieving 27J at -20°C.

Properties table:

These attributes make it versatile for boiler applications.

Density and Delivery Condition

The density of SA 537 Cl1 aligns with sa 537 cl.1 mechanical properties and density guide at 7.85 g/cm³ (7850 kg/m³), a standard for carbon steels that supports accurate design calculations.

Plates are delivered in normalized condition, with Gangsteel offering additional ultrasonic testing or stress relieving for fabrication readiness.

Available Specifications and Models

Gangsteel produces SA 537 Cl1 in thicknesses from 6mm to 300mm, widths up to 3500mm, and lengths to 18000mm.

Compliant with ASME SA537 Class 1, we provide custom cuts, beveling, and certifications like MTC per EN 10204.

Models include HIC-resistant variants for sour service.

Pricing Insights for SA 537 Cl1 Material

As of October 02, 2025, current pricing for asme sa537 class 1 pressure vessel plates ranges from $600 to $3,200 per metric ton, depending on thickness, quantity, and market conditions.

Standard plates (20-50mm) average $800-1,200 per ton in Asia, with premiums for customized or tested options.

Gangsteel offers quotes starting from $800 per ton for bulk orders, with FOB delivery to optimize costs.

Equivalent Materials for SA 537 Cl1

Equivalents provide alternatives for sourcing, with similar normalized properties.

Key matches include ASTM A537 Class 1 (USA), EN 10028-2 P355GH (EU), DIN 17155 19Mn6 (Germany), JIS G3115 SPV355 (Japan), BS 1501 224-490A/B (UK), GB 713 16MnR (China), KS D 3560 SPV355 (Korea), AFNOR 15CD4-05 (France), IS 2041 R260 (India), AS 1548 PT460N (Australia).

These offer comparable yield and tensile for pressure vessels.

Table:

Applications and Advantages in Boiler Systems

SA 537 Cl1 is used in boiler drums, storage tanks, and heat exchangers, offering resistance to moderate corrosion and easy fabrication.

Advantages include cost-effective thinner designs and good HIC resistance in sour services, reducing long-term maintenance.

Frequently Asked Questions (FAQs) About SA 537 Cl1 Material

What is SA 537 Cl1 material?

SA 537 Cl1, or ASME SA537 Class 1, is a normalized carbon-manganese-silicon steel plate for pressure vessels and boilers. It offers yield strength of 50 ksi min and tensile 70-90 ksi, ideal for moderate-temperature services with good toughness and weldability.

What is the difference between SA 537 Cl1 and Cl2?

SA 537 Cl1 is normalized (yield 50 ksi), suitable for standard services, while Cl2 is quenched/tempered (yield 60 ksi) for high-pressure or low-temp applications.

What are the applications of SA 537 Cl1?

Used in boiler drums, storage tanks, and heat exchangers for oil/gas and power, with HIC resistance for sour services.

Is SA 537 Cl1 equivalent to A537 Class 1?

Yes, identical in composition and properties, with SA537 for ASME codes.

In summary, SA 537 Cl1 material from Gangsteel is a versatile, tough steel for pressure applications. Contact us for supply.

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