What is ASME SA 537 Class 2 Equivalent To?

2026-07-31 | More News

What is SA 537 CL2 material?

SA 537 Class 2 is governed by ASME Section II SA-537, a quenched & tempered pressure vessel steel plate. Different from normalized SA537 Class 1, its heat treatment delivers higher tensile and yield strength, outstanding fatigue resistance and reliable weldability. It is widely adopted for heavy-load, high-pressure equipment in oil & gas, chemical and power industries.

ASME SA537 Class 2 Equivalents

Item	ASME SA 537 Class 2	ASTM A537 Class 2	EN 10028-6 P500Q	SA516 Grade 70	JIS G3115 SPV490
Standard	ASME SA-537	ASTM A537	EN 10028-6	ASME SA516	JIS G3115
Heat Treatment	Q&T	Q&T	Q&T	Normalized	Q&T
Min Yield Strength	≥415 MPa	≥415 MPa	≥500 MPa	≥260 MPa	≥490 MPa
Tensile Range	550–690 MPa	550–690 MPa	570–720 MPa	485–620 MPa	610–740 MPa
Main Application	High-pressure vessels	High-pressure vessels	European pressure vessels	General medium-pressure tanks	Japanese pressure equipment

Key Advantages Of SA537 Class 2 Plates

Higher Strength: Minimum yield strength is 60 ksi (415 MPa) and tensile strength ranges from 80 to 100 ksi (550–690 MPa), which outpaces Class 1’s 50 ksi yield strength

Quenched and Tempered: This special heat treatment creates a finer grain structure for increased hardness, toughness, and residual strength.

Design Efficiency: Higher load-bearing capacity lets engineers design thinner components for heavy-duty boilers, reactors, and storage tanks.

Temperature and Impact Resistance: Performs reliably under high internal pressures, mechanical shocks, and demanding low- or high-temperature environments.

Good Fabrication: Retains favorable weldability and ductility despite its high strength level.

SA537 class 2 Chemical Composition

SA537 class 2Chemical Composition
Grade	The Element Max (%)
Grade	C	Mn	P	S	Si	Cu	Ni	Cr	Mo
SA537 class 2	0.24	0.92-1.72	0.035	0.035	0.13-0.55	0.38	0.28	0.29	0.09

Carbon Equivalent: Ceq = 【C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15】%

SA537 class 2 Mechanical Property

Grade	SA537 class 2 Mechanical Property
Grade	Thickness	Yield	Tensile	Elongation
SA537 class 2	mm	Min Mpa	Mpa	Min %
	-65	415	550-690	22
	65-100	380	515-655	20
	100-150	315	485-620	–

Key Industrial Uses of SA537 class 2 carbon-manganese-silicon steel plate

Oil and Gas: Refineries and petrochemical processing plants.

Power Generation: Nuclear steam generators, reactor vessels, and power plant boilers.

Manufacturing: Pressurizers, heat exchangers, and pressurized storage tanks.

Core Rules for Material Substitution

Grade replacement cannot be confirmed simply based on equivalent tables. Buyers and designers need to check three key points:

Comply with applicable design codes: ASME VIII, EN 13445 or other local pressure vessel standards
Verify full set of performance: yield strength, tensile strength, low-temperature impact toughness
Obtain formal approval from end user, EPC contractor and authorized third-party inspector

Supply Specifications of SA 537 Class 2 Steel Plate

Item	Available Range
Thickness	6 mm – 200 mm
Max Width	Up to 3000 mm
Length	Customized sizes
Available Tests	UT inspection, Charpy impact test, third-party witness inspection
Mill Certificate	EN10204 3.1 / 3.2

Why Choose GNEE Steel for SA 537 Class 2 Plate

Rich experience supplying ASME standard pressure vessel steel for global energy and petrochemical projects
Complete document support: certified test reports, ultrasonic testing and impact test records
One-stop service: flame/plasma cutting, edge preparation, surface blasting and customized dimensions
Flexible lead time for bulk orders and small trial orders

Matching equivalent grades for ASME SA 537 Class 2 demands careful cross-checking of standards, mechanical data and project certification rules. GNEE Steel supplies premium ASME SA 537 Class 2 quenched and tempered steel plates with full traceable documentation and custom processing.

Request SA537 Class 2 Steel Plate Quote — Contact our engineering team to get material recommendations and competitive pricing for your pressure vessel project.

FAQ

What is the difference between SA 537 Class 1 and Class 2?

Overview SA 537 Cl 1 & SA 537 Cl 2

Class 1 is normalized and the tensile is in the 70,000 – 90,000 level. Class 2 is quenched and tempered with a tensile range of 80,000 – 100,000. Minimum yield strength for class 1 is 50,000 and for class 2 is 60,000.

What is the difference between SA 516 GR 70 and SA 537 CL 2?

SA 537’s superior toughness suits low-temperature, high-stress use. SA 537 Class 2 undergoes quenching and tempering, enhancing its toughness compared to SA 516’s normalizing process. Gangsteel’s SA 516 plates, such as ASTM A 516 GR 70, are optimized for standard pressure vessel applications with excellent weldability.

Is SA 537 carbon steel?

The ASME SA537 specification covers heat treated carbon steel plates for pressure vessel applications. This steel which is a carbon, manganese and silicon alloy, is supplied in the normalised condition for Class 1 plates and quenched and tempered for Class 2 plates.

What is the density of SA 537 CL 1 material?

For ASME SA537 Class 1, the density is approximately 7.85 g/cm³ or 7850 kg/m³, standard for carbon steels of this type.

What are the mechanical properties of SA 537 CL2?

Mechanical properties include tensile strength of 80-100 ksi (550-690 MPa), yield strength of 60 ksi (415 MPa) min for ≤65mm thick (decreasing to 46 ksi for >100mm), elongation of 22% min (≤100mm), and reduction in area typically high

Is SA537 Class 2 the same as ASTM A537 Class 2?

Yes. SA537 Class 2 is the ASME Section II specification version of ASTM A537 Class 2 with identical chemical and mechanical requirements.

What is the European equivalent grade for SA537 Class 2?

EN 10028-6 P500Q / P500QL are the closest options. Do not substitute without design calculation and official approval.