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ASTM A537/A537M

ASTM A537/A537M are specifications for heat-treated, carbon-manganese-silicon steel plates used in fusion-welded pressure vessels and structures. A537 is the standard designation, while A537M is the metric version. These plates are widely used in the fabrication of boilers and pressure vessels in various industries. 

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Product Description

1.What are the chemical compositions and mechanical properties of ASTM A537/A537M?

Chemical Composition

Element Grade 1 (Carbon Steel) Grade 2 (Low-Alloy Steel)
Carbon (C) ≤ 0.25% ≤ 0.20%
Manganese (Mn) 0.80–1.40% 1.20–1.60%
Silicon (Si) 0.15–0.40% 0.15–0.50%
Phosphorus (P) ≤ 0.035% ≤ 0.035%
Sulfur (S) ≤ 0.035% ≤ 0.035%
Nickel (Ni) ≤ 1.00% (optional in some grades)
Chromium (Cr) ≤ 0.30% (optional)
Molybdenum (Mo) ≤ 0.12% (optional)
Vanadium (V) ≤ 0.05% (optional)

Mechanical Properties

Property Grade 1 Grade 2
Yield Strength (MPa) ≥ 255 (Class 1) ≥ 315 (Class 1)
  ≥ 275 (Class 2) ≥ 345 (Class 2)
Tensile Strength (MPa) 440–585 515–655
Elongation in 50 mm (%) ≥ 18 (Class 1) ≥ 18 (Class 1)
  ≥ 16 (Class 2) ≥ 16 (Class 2)
Impact Toughness (Charpy V-Notch) Class 2 only: ≥ 27 J at specified temperature (e.g., -20°C for Grade 1 Class 2, -46°C for Grade 2 Class 2) Class 2 only: ≥ 27 J at specified temperature (e.g., -46°C for higher grades)

 

2.What are the characteristics of ASTM A537A537M?

  • Heat Treatment:Requires quenching and tempering (Q&T) or normalizing and tempering to achieve specified mechanical properties, enhancing strength and toughness.
  • Grades and Classes:

Grades:Grade 1: Carbon steel (e.g., Class 1, Class 2 with higher strength);Grade 2: Low-alloy steel (e.g., Class 1, Class 2 with improved impact resistance).

Classes differentiate based on impact test requirements (e.g., Class 2 plates undergo Charpy V-notch impact testing for better toughness).

  • Weldability:Requires proper welding procedures (e.g., preheating, post-weld heat treatment) to avoid hydrogen-induced cracking.

especially for thicker sections or higher-strength grades.

 

3.What are the application scenarios of ASTM A537A537M?

Used in pressure vessels, boilers, storage tanks, and other welded structures subjected to high pressure or temperature in industries such as:Petrochemicals,Power generation,Industrial gas processing.

 

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