ASTM A199 specifies several grades of alloy steel tubes, including Grade T4, T5, T9, T11, T21, T22, T91, and T92. Each grade is designed for specific high-temperature and corrosion-resistant applications.

ASTM A179 tubes are made from low-carbon steel, typically with a carbon content of 0.06-0.18%. This low carbon content makes the tubes suitable for bending, flaring, and other forming operations while maintaining good heat transfer properties.

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ASTM A209 / A209M, ASME SA209 T1, T1a, T1b is the standard applicable to seamless carbon-Molybdenum Alloy-Steel Boiler and Superheater Tubes.

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TP321 and TP321H stainless steel have excellent corrosion resistance, particularly in environments containing organic and inorganic acids. They are often used in chemical processing, pharmaceutical, and food processing industries.