ASTM A633 steel includes four grades: A, C, D, and E, of which the thickness of grade C can reach 4 inches and the thickness of grade E can reach 6 inches. ASTM A633 steel specification is based on the standard specification for standardized high-strength low-alloy structural steel plate, which requires high notch toughness under low temperature conditions.
ASTM A283 is a standard specification for low and intermediate tensile strength carbon steel plates of structural quality for general application. It covers four grades (A, B, C, D) with incrementally higher minimum yield and tensile strength requirements. Q195 is a comparable Chinese standard (GB/T 700) grade, often supplied as an equivalent.
ASTM A588 is a high-strength low-alloy (HSLA) structural steel widely known as weathering steel. It provides a minimum yield strength of 50 ksi (345 MPa) along with superior atmospheric corrosion resistance (typically 4-6 times that of plain carbon steel) due to alloying elements such as copper, chromium, nickel, and silicon that form a protective, adherent oxide patina. This steel is designed for applications where high strength, durability, and reduced maintenance are required, particularly in exposed structural applications.
A36/Q235/S235JR Carbon Steel Plate
A36 is a low-carbon steel containing trace amounts of manganese, phosphorus, sulfur, silicon and other elements such as copper. A36 has good weldability and high yield strength, and is the structural steel plate specified by the engineer. ASTM A36 steel plate is often manufactured into a variety of structural steel parts. This grade is used for welded, bolted or riveted construction of bridges and buildings, as well as for general structural purposes. Due to its low yield point, A36 carbon plate can be used to design lighter weight structures and equipment, and provide good weldability. Construction, energy, heavy equipment, transportation, infrastructure and mining are the industries where A36 panels are commonly used.
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