What Is ASTM A537 CL.3 Equivalent Grade


Qfsteels Bolier Plate Factory are specialized in producing and exporting ASTM A537 CL.3 Equivalent Grade Boiler steel plate and heavy plate and wide heavy plate.

We are a large ASTM A537 CL.3 Equivalent Grade steel plate supplier.

  1. ASTM SA537 Standard Specification for High-Strength Low-Alloy Columbium-Vanadium Structural Steel
  2. A537 CL.3 Specification: Thick 1mm to 200mm,Width 1500mm to 3500mm,Length: 3000mm to 27000mm
  3. Third Party Inspection for A537 CL.3 will be according to requirement of customer.
  4. A537 CL.3 Chemical composition % of the Product analysis of grade
Grade SA537Gr.55 Chemical Composition, Max (%)
C Si Mn P S
A537 CL.3 0.21-0.27 0.13-0.45 0.79-1.3 0.035 0.035
  1. A537 CL.3 Mechanical Property
Grade SA537Gr.55 Mechanical Property
Thickness Yield Tensile Elongation
A537 CL.3 mm Min Mpa Mpa Min  %
5-50 220 415-550 25%
50-200 220 415-550 21%

ASTM A537 CL.3 Equivalent Grade

P355GH, A516GR70, are not exactly equal grade.If we have to find one and 16Mo3 should be better choice. the detail equal grade should be discussed with your engineer.

ASTM A537 CL.3 steel plates shall be normalized. SA537CL2 and A537 CL.3 plates shall be quenched and tempered. The tempering temperature for Cl2 plates shall not be less than 1100°F [595°C] for not less than 1⁄2 h and 1150°F [620°C] for Class 3 plates for not less than 1⁄2 h.

ASTM A537 CL.3 Equivalent

  1. A537 CL.3 Delivery Time Or Lead Time: 15-30days
  2. A537 CL.3 Extra Service: Pretreatment (Shot Blasting, Sand Blast, Painting and Galvanized), Cutting Parts, Sample Service, Third Party inspection, UT Test and Size inspection.
  3. If you have requirement of A537 CL.3  new plate or stock list of material, please feel free to contact us by email of calling.
  4. If you had any question at our plate or service. Please contact our after service department to get faster reply.

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Supplementary Requirements

S2. Product Analysis,       S8: Ultrasonic Examination

S3: Simulated pos-weld heat treatment of mechanical

S15: Reduction of area measurement and test coupons

S18: Maximum Tensile strength

S6: Drop weight test

S30:Charpy V notch impact test for structural shapes

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What Is ASTM A537 CL.3 Equivalent Grade