ASTM A1068-10(2015) is a standard specification for seamless carbon steel pipe for high-temperature service. It covers various grades of carbon steel pipe meant for different temperature and pressure ratings. The A1068-10(2015) steel grade is known for its strength and versatility, making it suitable for a wide range of applications.
The chemical composition of A1068-10(2015) steel grade is as follows:
– Carbon (C): The maximum carbon content is 0.30%, which provides good strength and hardenability to the steel.
– Manganese (Mn): The maximum manganese content is 1.40%, which contributes to the strength and toughness of the steel.
– Phosphorus (P): The maximum phosphorus content is 0.025%, which helps improve the steel’s machinability and strength.
– Sulfur (S): The maximum sulfur content is 0.025%, which enhances the steel’s machinability.
– Silicon (Si): The maximum silicon content is 0.10%, which helps improve the steel’s strength and resistance to oxidation.
– Copper (Cu): The maximum copper content is 0.40%, which enhances the steel’s corrosion resistance.
– Nickel (Ni): The maximum nickel content is 0.40%, which improves the steel’s toughness and ductility.
– Chromium (Cr): The maximum chromium content is 0.40%, which enhances the steel’s resistance to corrosion and oxidation.
The mechanical properties of A1068-10(2015) steel grade are as follows:
– Tensile Strength: The minimum tensile strength is 60,000 psi (415 MPa).
– Yield Strength: The minimum yield strength is 35,000 psi (240 MPa).
– Elongation: The minimum elongation is 30%.
– Hardness: The maximum hardness is 95 HRB (Rockwell hardness B scale).
– Impact Toughness: The steel grade should have good impact toughness to withstand high-temperature service conditions.
In summary, A1068-10(2015) steel grade is a strong and versatile carbon steel that exhibits good mechanical properties and chemical composition suitable for high-temperature service. It is widely used in industries such as oil and gas, power generation, and petrochemicals.