What Is A573 Grade 65
ASTM A573 Grade 65 steel plate is a structural-quality carbon-manganese-silicon steel designed for applications where enhanced toughness and moderate tensile strength are required. The A573 standard covers three tensile strength levels, Grade 58, Grade 65, and Grade 70, of structural carbon steel plates of improved toughness for service primarily at atmospheric temperatures where notch toughness is important.
Mechanical Properties
Grade 65 has a minimum yield strength of 240 MPa, 35 ksi, a tensile strength of 450 to 530 MPa, 65 to 77 ksi, and minimum elongation of 20 percent in 200 mm and 23 percent in 50 mm. The steel is made by open-hearth, basic oxygen, or electric furnace processes.
Chemical Composition
Composition limits are carbon 0.24 percent maximum, manganese 0.85 to 1.20 percent, phosphorus 0.035 percent, sulfur 0.04 percent, and silicon 0.15 to 0.40 percent.
Applications
Bridges and building structures use the plate for girders, columns, and frames where strength and ductility resist impact and seismic loads. Pressure vessels and storage tanks use it for welded low-pressure vessels and atmospheric-temperature oil storage tanks. Machinery and equipment frames use it for cranes, lifting devices, and heavy mechanical supports under dynamic stress, and offshore and energy sectors use it for wind towers, pipeline supports, and platforms.
Supply Specification
The plate is supplied in thicknesses of 8 to 300 mm with widths of 1500 to 4020 mm and lengths to 27000 mm, with third-party inspection available and classification certificates per the applicable classification society rules.
Frequently Asked Questions
Q: What is the yield strength of A573 Gr.65?
A: 240 MPa minimum.
Q: What is the tensile strength?
A: 450 to 530 MPa.
Q: What are the three grades of A573?
A: Grade 58, Grade 65, and Grade 70 by tensile level.
Q: Where is A573 used?
A: Bridges, pressure vessels, machinery, and offshore structures.
Q: What is the carbon limit?
A: 0.24 percent maximum.
Q: What makes it different from A36?
A: Guaranteed notch toughness for atmospheric-temperature service.
For A573 Grade 65 plate quotations, contact our sales team.