SA537

SA537 is a heat treated steel plate that is used in pressure vessels, and Kloeckner Metals is proud to supply it routinely across our nationwide network of branches.

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Typical Standards

ThicknessWidthLength
3/16" - 6"48" - 120"96" - 480"

General Info About SA537

This heat treated, carbon/manganese/silicon steel plate is less sensitive in harsh weather conditions due to its composition. The notch toughness will withstand even in low temperature conditions, making it a great option for pressure vessel plates. It has designated classes which are determined by their specific heat treatment process. Class I is normalized and Class II is quenched and tempered.

More Details About SA537

  • Advantages/Disadvantages

    It offers excellent notch toughness and high strength. It also shows good corrosion resistance, and sustains at high pressures with excellent stress distribution.

  • Industries

    This fine grain steel meets high composition standards required by oil, gas, and petrochemical industries for application in high pressure-retaining vessels.

  • Applications

    The grade is excellent for use in fusion welded pressure vessels and structures where low to moderate temperature services and high strength levels are required. This includes pressurized tanks, boilers, food processing equipment, piping and heat exchangers.

  • Machining

    It has good machinability.

  • Welding

    It has good weldability.

  • Heat Treatment

    It is heat treatable.

Chemical Properties of SA537 Class I & Class II

CSMn <40mmMn > 40mmPSiCrCuNiMo
0.240.0350.70 - 1.351.0 - 1.60.0350.15 - 0.50.250.350.250.8

Mechanical Properties of SA537 Class I

Mechanical Properties
MetricImperial
Tensile Strength, Ultimate485 - 620 MPa70 - 90 ksi
Tensile Strength, Yield345 MPa50 ksi
Elongation in 2"22%22%

Mechanical Properties of SA537 Class II

Mechanical Properties
MetricImperial
Tensile Strength, Ultimate550 - 690 MPa80 - 100 ksi
Tensile Strength, Yield415 MPa50 ksi
Elongation in 2"22%22%

Frequently Asked Questions About SA537

  • What is the difference between SA537 Class I and Class II?

    The heat treatment process differs between the classes for this PVQ steel plate. Class I is normalized, whereas Class II is quenched and tempered. The quenched and tempered process gives Class II slightly more strength, and it is available in greater thickness.

  • What is the difference between SA537 and SA516?

    These two carbon steel low alloy plates both achieve PVQ specifications, however SA516 is more popular and is seen in a wider range of applications. SA516 and SA537 Class I share a normalized heat treatment, but differ in chemical composition and yield strength. SA537 has a higher yield strength ensuring high pressures will be retained without fracture. SA537 Class II shows slightly greater strength than SA516 overall, and receives a different heat treatment.

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