ASTM/ASME Specifications
ASTM/ASME specifications
ASTM A516/A516M, ASTM A387/A387M, ASTM A285/A285M, and ASTM A537/A537M, are widely used in the United States and other regions. These specifications cover various grades of boiler steel plates tailored to specific temperature, pressure, and service conditions.
B. EN Specifications
EN specifications, governed by the European Norm (EN), encompass standards such as EN 10028, EN 10207, EN 10222, and EN 10273. These specifications are prevalent in Europe and adhere to harmonized material requirements for boiler steel plates across member states.
C. JIS Specifications
JIS specifications, developed by the Japanese Industrial Standards Committee, define requirements for boiler steel plates in Japan and other Asian markets. Standards like JIS G3103, JIS G3115, and JIS G3118 specify grades and properties for boiler and pressure vessel applications.
D. GB Specifications
GB specifications, issued by the Standardization Administration of China (SAC), regulate boiler steel plates in China. Standards such as GB 713, GB 3531, and GB 5310 establish material requirements and testing procedures for boilers, pressure vessels, and related components.
A. Chemical Composition Requirements
Boiler steel plate specifications specify the minimum and maximum limits for elements such as carbon, manganese, phosphorus, sulfur, silicon, and alloying elements (e.g., chromium, molybdenum). The chemical composition directly influences the mechanical properties and performance of the boiler plate.
B. Mechanical Properties
Mechanical properties outlined in boiler steel plate specifications include tensile strength, yield strength, elongation, impact toughness, and hardness. These properties ensure the structural integrity, durability, and resistance to deformation and fracture under specified loading conditions.
C. Heat Treatment
Heat treatment requirements define the processes, temperatures, durations, and cooling methods employed to achieve desired microstructures and mechanical properties in boiler steel plates. Common heat treatment processes include normalization, quenching, tempering, and stress relieving.
D. Dimensions and Tolerances
Specifications specify the dimensions, thicknesses, widths, lengths, and tolerances for boiler steel plates to ensure compatibility with fabrication processes and assembly requirements. Tight dimensional tolerances are critical for achieving proper fitment and structural integrity in boiler components.
A. ASTM A516/A516M
- Grades: A516 Grade 55, A516 Grade 60, A516 Grade 65, A516 Grade 70
- Composition: Carbon steel with moderate to high levels of manganese, phosphorus, sulfur, and silicon
- Mechanical Properties: High tensile strength, yield strength, and notch toughness
- Applications: Pressure vessels for moderate to lower temperature service
B. ASTM A387/A387M
- Grades: A387 Grade 11 Class 1, A387 Grade 11 Class 2, A387 Grade 12 Class 1, A387 Grade 12 Class 2, and others
- Composition: Alloy steel with chromium and molybdenum for enhanced corrosion and oxidation resistance
- Mechanical Properties: High-temperature strength and excellent creep resistance
- Applications: High-temperature pressure vessels in power generation and petrochemical industries
C. ASTM A285/A285M
- Grades: A285 Grade A, A285 Grade B, A285 Grade C
- Composition: Low to intermediate tensile strength carbon steel with moderate carbon content
- Mechanical Properties: Suitable for moderate-pressure vessel service with good weldability and formability
- Applications: Boilers and pressure vessels for moderate-pressure applications
D. ASTM A537/A537M
- Grades: A537 Class 1, A537 Class 2, A537 Class 3
- Composition: Heat-treated carbon-manganese-silicon steel with high tensile strength and impact toughness
- Mechanical Properties: Designed for elevated temperature service with excellent strength and resilience
- Applications: Pressure vessels and storage
