ASTM A36 Carbon Steel Sheet and Plate Overview ASTM A36 is a widely used carbon steel specification that covers plates, bars, and structural shapes for construction and general engineering applications. A36 steel sheets and plates are known for their excellent weldability, machinability, and moderate strength, making them suitable for a variety of industrial and structural uses. Material Composition and Properties ASTM A36 is a low-carbon steel with a typical composition of: - Carbon (C): ≤ 0.26% - Manganese (Mn): ≤ 0.75% - Phosphorus (P): ≤ 0.04% - Sulfur (S): ≤ 0.05% - Silicon (Si): ≤ 0.40% The low carbon content ensures good formability and weldability, while manganese enhances strength and hardness. A36 steel plates and sheets exhibit a minimum yield strength of 36,000 psi (250 MPa) and a tensile strength ranging from 58,000 to 80,000 psi (400–550 MPa). Mechanical Characteristics - Ductility: A36 steel has good elongation (around 20–23% in 8 inches), allowing it to bend and form without cracking. - Weldability: Due to its low carbon equivalent, A36 can be easily welded using common methods like SMAW, GMAW, and FCAW without preheating in most cases. - Machinability: The material is relatively soft compared to high-carbon steels, making it easier to cut, drill, and machine. - Corrosion Resistance: Like most carbon steels, A36 is not inherently corrosion-resistant and may require protective coatings (e.g., galvanizing or painting) for outdoor use. Applications of A36 Steel Sheets and Plates A36 steel plates and sheets are commonly used in: - Structural frameworks (beams, columns, brackets) - Construction equipment (platforms, stairs, supports) - Industrial machinery (frames, bases, enclosures) - Transportation components (trailer beds, chassis parts) - Fabrication projects (tanks, brackets, custom metal parts) Available Forms and Sizes A36 steel plates and sheets are supplied in various thicknesses, typically ranging from 0.5 mm to 200 mm (0.02" to 8"), with standard widths up to 3,000 mm (120") and lengths up to 12,000 mm (480"). They can be hot-rolled or cold-rolled, with hot-rolled being more common for structural applications. Advantages of ASTM A36 Steel - Cost-effective compared to high-alloy steels. - Readily available in global markets. - Balanced strength and workability for diverse fabrication needs. In summary, ASTM A36 carbon steel sheets and plates are a versatile, economical choice for structural and industrial applications where moderate strength, weldability, and machinability are essential. Proper surface treatment is recommended for long-term durability in corrosive environments.