SA 283 Grade C and SA 516 Grade 70 are two different specifications for carbon steel plates used in pressure vessel applications. Here are the key differences between SA 283 Gr C and SA 516 Gr 70:
Tensile Strength and Yield Strength:
SA 283 Grade C: The minimum tensile strength of SA 283 Gr C is 55,000 psi (380 MPa), and the minimum yield strength is 30,000 psi (205 MPa).
SA 516 Grade 70: The minimum tensile strength of SA 516 Gr 70 is 70,000 - 90,000 psi (485 - 620 MPa), and the minimum yield strength is 38,000 psi (260 MPa).
Application:
SA 283 Grade C: SA 283 Gr C is primarily used for intermediate to low-temperature pressure vessels and structural applications. It has good weldability and formability.
SA 516 Grade 70: SA 516 Gr 70 is commonly used for moderate and lower-temperature pressure vessel applications. It offers excellent notch toughness and is well-suited for sour service environments.
Carbon Content and Composition:
SA 283 Grade C: The carbon content in SA 283 Gr C is typically held within a range of 0.24%-0.31% by weight.
SA 516 Grade 70: The carbon content in SA 516 Gr 70 is typically held within a range of 0.27%-0.31% by weight.
Maximum Thickness:
SA 283 Grade C: SA 283 Gr C is generally available in thicknesses up to 2 inches (50 mm).
SA 516 Grade 70: SA 516 Gr 70 can be obtained in various thicknesses, ranging from 3/16" to 4" (4.8 mm to 101.6 mm).
It's important to consult the specific requirements, standards, and codes applicable to your project or application to determine the most suitable grade for your needs. The choice between SA 283 Gr C and SA 516 Gr 70 depends on factors such as operating conditions, required strength, temperature limitations, and compliance with relevant specifications.
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