Qfsteels Bolier Plate Factory are specialized in producing and exporting ASTM A537 CLASS 3 STEEL PLATES Boiler steel plate, Low alloy and high strength steel plate,  heavy plate and wide, heavy plate, Which is a large steel plate supplier mill at Qfsteels Group.


Keyword: A537 CLASS 3,ASTM A537 CLASS 3,A537 CLASS 3 Steel,A537 CLASS 3 HIC,A537 CLASS 3 NACE


  1. ASTM A537 CLASS 3 STEEL PLATES Adopt standard: ASTM SA537 Standard Specification for High-Strength Low-Alloy Columbium-Vanadium Structural Steel
  2. A537 CLASS 3 Specification: Thickness: 1mm to 200mm; Width: 1500mm to 3500mm: Length: 3000mm to 27000mm
  3. Third Party Inspection for A537 CLASS 3: ABS, DNV, BV, GL, CCS, LR, RINA, KR, NK, CE, SGS, IKE, IEI or other quality department.
  4. A537 CLASS 3 Chemical composition % of the Product analysis of grade
Grade SA537Gr.55 Chemical Composition, Max (%)
C Si Mn P S
A537 CLASS 3 0.21-0.27 0.13-0.45 0.79-1.3 0.035 0.035
  1. A537 CLASS 3 Mechanical Property
Grade SA537Gr.55 Mechanical Property
Thickness Yield Tensile Elongation
A537 CLASS 3 mm Min Mpa Mpa Min  %
5-50 220 415-550 25%
50-200 220 415-550 21%


Normally ASTM A537 CLASS 3 plates are normally supplied in the as-rolled condition. The plates may be ordered normalized or stress relieved, or both.

ASTM A537 CLASS 3 steel plates shall be normalized. SA537CL2 and A537 CLASS 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.


  1. ASTM A537 CLASS 3 STEEL PLATES Delivery Time Or Lead Time: 15-30days
  2. A537 CLASS 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 any requirement in steel plate for A537 CLASS 3, whether the 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.

Qfsteels Group Company Principle


More Cheaper Price,

More Faster Delivery,

The Best Company Prestige,

The Best After sales service,

The One step Steel material Solution

The Best Professional quality control system

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


Welcome to Qfsteels Group and any requirement in steel material, please feel free to contact us.


If any requirement for ASTM A537 CLASS 3 STEEL PLATES, please contact us