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ASME SA 537 CL.2 PLATES

Material Grade: ASME SA 537 Class 2 / ASTM A537

Material Type: High-Strength C-Mn-Si Pressure Vessel Steel

Heat Treatment: Quenched & Tempered (Q&T)

Maximum Strength: Yield Strength: 415 MPa / 60 ksi (Min)

Structural Benefit: Highest Load Capacity in SA 537 Series

Service Focus: Critical High-Pressure Fusion Welding

Notch Toughness: Superior Impact Resistance at Low Temps

Typical Use: Heavy-Wall Pressure Vessels & Storage Spheres

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ASME SA 537 Class 2 Plates are the high-strength evolution of carbon-manganese-silicon steel, specifically engineered for the most demanding Pressure Vessel Quality (PVQ) applications. The defining distinction of Class 2 material is its heat treatment; while Class 1 is normalized, Class 2 plates undergo a rigorous Quenched and Tempered (Q&T) process. This metallurgical enhancement significantly boosts the yield and tensile strength, making it one of the strongest carbon steel options available under the ASME Boiler and Pressure Vessel Code for fusion-welded vessels and structures.

The technical superiority of SA 537 CL.2 lies in its ability to handle extreme internal pressures with a minimum yield strength of 415 MPa (60 ksi). This increased strength allows engineers to significantly reduce plate thickness and overall vessel weight without compromising safety or structural integrity. It is exceptionally well-suited for heavy-wall pressure vessels, large-scale storage spheres, and high-pressure boilers used in the petrochemical, gas, and energy sectors. By choosing SA 537 Class 2, manufacturers benefit from a material that offers a rare combination of maximum load-bearing capacity, superior low-temperature notch toughness, and excellent weldability for critical industrial infrastructure.

ASME SA 537 CL.2 PLATES Features

» Maximum Yield Strength: Provides a minimum yield strength of 415 MPa (60 ksi), the highest in the SA 537 series, allowing for high-pressure containment with optimized plate thickness.
» Quenched & Tempered (Q&T): Undergoes a specialized liquid-quench and tempering process to achieve a superior combination of high strength and excellent ductility.
» Superior Impact Resistance: Engineered for exceptional notch toughness at lower temperatures, ensuring structural stability and resistance to brittle fracture in cold service environments.
» Fusion Welding Specialist: Specifically designed for high-integrity fusion welding, making it the preferred choice for heavy-walled pressure vessel shells and spherical tanks.
» Advanced Grain Refinement: The Q&T process results in an extremely fine and uniform grain structure, which enhances the material's fatigue life and overall mechanical reliability.
» Significant Weight Reduction: Its high-strength profile allows engineers to design lighter vessels, leading to reduced material costs, lower transport weight, and easier installation.
» Fully Killed Steel Practice: Produced using deoxidization techniques to ensure internal purity and structural uniformity, minimizing the risk of internal defects like laminar tearing.
» Global Compliance: Fully certified to ASME Section II and ASTM standards, supplied with detailed Mill Test Certificates (MTC) to meet stringent regulatory safety requirements.

ASME SA 537 CL.2 PLATES Specification

Standards

ASME: SA 537 Class 2
ASTM: A 537 Class 2
Type: C-Mn-Si Steel
Heat Treat: Quenched & Tempered

Chemistry

Carbon (C): 0.24% Max
Manganese (Mn): 0.70% - 1.60%
Silicon (Si): 0.15% - 0.50%
Phosphorus (P): 0.035% Max

Strength

Yield Strength: 415 MPa (Min)
Tensile Strength: 550 - 690 MPa
Elongation (8in): 18% (Min)
Elongation (2in): 22% (Min)

Processing

Welding: Superior (Q&T Grade)
Impact: Charpy V-Notch Tested
Condition: Hardened & Tempered
Forming: Balanced Ductility

Dimensions

Thickness: 6 mm to 150 mm
Width: 1500 mm to 3000 mm
Length: 3000 mm to 12000 mm
Service: Custom Profile Cutting

Quality

MTC: EN 10204 3.1 Certified
Ultrasonic: ASTM A578 Level C
Traceability: Full Heat Number ID
Origin: Tier-1 Global Source

ASME SA 537 CL.2 PLATES Detailed Specifications

Property	Specification
Grade	ASME SA 537 CL.2 Boiler and Pressure Vessel Steel Plates
Width	1000mm-4500mm
Thickness	5mm-150mm
Length	3000mm-18000mm.
Supply Condition	As Rolled, Normalized Rolling, Furnace Normalizing, Vacuum Degassing, Simulated Post-Weld Heat Treatment or as per customer requirement.
Impact tested	-52° C
Tempering	Notch toughness can be improved by quenched cooling from hot rolling or normalizing by the supplier. If such a faster cooling rate is agreed upon between purchaser and supplier then the steel is also to be tempered at 1200 F.
Applications	Used for Boilers and Pressure Vessels Application.
Process of Manufacturing	Hot-Rolled (HR)

ASME SA 537 CL.2 PLATES Chemical Composition

C	Mn		P	S	Si	Cr	Cu	Ni	Mo
	≤ 40 mm	> 40 mm
0.24 max	0.70/1.35	1.00/1.60	0.035	0.035	0.15/0.50	0.025	0.35	0.25	0.080

ASME SA 537 CL.2 PLATES Mechanical Properties

Grade	Heat Treatment	Tensile (MPa)	Yield (MPa)	Elongation
SA537 Class 2	Quenched and tempered	550–690	415	22%

ASME SA 537 CL.2 PLATES Equivalent Grades

Steel Grade	JIS	Germany
ASTM/ASME	G3115	DIN17155
A537 / SA537	SPV36	19Mn5

Industrial Locations & Keywords

Industrial Locations & Keywords
Riyadh Industrial Cities (1st, 2nd, 3rd & Sudair)
Jeddah Industrial Cities (1st, 2nd & 3rd)
Dammam Industrial Areas (1st, 2nd & 3rd)
Jubail Industrial City
Yanbu Industrial City
Rabigh Industrial City
Al Khobar Industrial Area
Al Ahsa Industrial City
Madinah Industrial City
Makkah Industrial City
Taif Industrial City
Tabuk Industrial City
Jazan Industrial City
Industrial supplier in Saudi Arabia
Pipe fittings supplier in Jubail / Dammam / Riyadh
Flange and valve supplier Saudi Arabia
Fast delivery industrial materials KSA