ASTM A537 standard refers to pressure vessel plates, material in heat-treated, carbon-manganese silicon steel. Based on different strength and heat treatment, it ranges to Class 1, 2 and 3. The maximum thickness under ASTM A537 Class 1 is 100 mm [4 inch], and 150 mm [6 inch] for Class 2 and Class 3.

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ASTM A537 Class 1,2,3 Boiler Plates Description:

The ASTM A537 specification is the Standard Specification for Pressure Vessel Plates, Heat-Treated, Carbon-Manganese-Silicon Steel used in the applications of fusion welded pressure vessels and structures. Typical applications are pressure vessels designed for moderate and lower-temperature service requiring excellent notch toughness as well as API 650 and API 620 storage tanks. Class 1 material is available as Normalized and Class 2 is available as Quenched & Tempered plates.

Chemical Composition and Mechanical Properties:

ASTM A537 Class 3(A537CL3)

MATERIAL	C	Mn	Si	P≤	S≤
ASTM A537 Class 3(A537CL3)	0.24	0.13-0.55	0.92-1.72	0.035	0.035

MATERIAL	Tensile Strength(MPa)	Yield Strength(MPa) MIN	% Elongation MIN
ASTM A537 Class 3(A537CL3)	485-690	275-380	20

ASTM A537 Class 2(A537CL2)

MATERIAL	C	Mn	Si	P≤	S≤
ASTM A537 Class 2(A537CL2)	0.24	0.13-0.55	0.92-1.72	0.035	0.035

MATERIAL	Tensile Strength(MPa)	Yield Strength(MPa) MIN	% Elongation MIN
ASTM A537 Class 2(A537CL2)	485-690	315-415	20

ASTM A537 Class 1(A537CL1)

MATERIAL	C	Mn	Si	P≤	S≤
ASTM A537 Class 1(A537CL1)	0.24	0.13-0.55	0.92-1.72	0.035	0.035

MATERIAL	Tensile Strength(MPa)	Yield Strength(MPa) MIN	% Elongation MIN
ASTM A537 Class 1(A537CL1)	450-585	310	18

Referenced Documents

ASTM Standards:

A20/A20M: Specification for General Requirements for Pressure Vessel Plates
A435/A435: For Straight-Beam Ultrasonic Examination of Steel Plate
A577/A577M: For Ultrasonic Angle-Beam Examination of Steel Plates
A578/A578M: For Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applications

Manufacturing Notes:

Steel Plate under ASTM A537 Class 1, 2 and 3 shall be killed steel and comply with fine austenitic grain size requirement of Specification A20/A20M.

Heat Treatment Methods:

All plates under ASTM A537 shall be heat treated as follows:
ASTM A537 Class 1 plates shall be normalized.
Class 2 and Class 3 plates shall be quenched and tempered. The tempering temperature for Class 2 plates shall not be less than 1100°F [595°C] and not less than 1150°F [620°C] for Class 3 plates.

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Shandong Chengshun Metal Materials Co., Ltd. is located in Jinan City, Shandong Province. It is a comprehensive company dealing in high-quality steel products, with a superior geographical location and very convenient transportation. The company has a complete and scientific quality system, and has been recognized by the industry for its integrity, strength and product quality.

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Boiler Pressure Vessel Steel