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ASTM A312 Tp347H is an austenitic stainless steel that contains chromium and nickel for corrosion resistance. To enhance toughness, TP347H has a higher carbon content than standard TP347. While the higher carbon improves ductility and toughness, it does reduce the overall strength compared to its lower-carbon counterpart. To compensate for this, niobium is added to
The alloy, providing excellent resistance to oxidation and intergranular corrosion, even at high temperatures.
SS 347H seamless pipes are typically cold drawn and cannot be hardened by heat treatment, but they can be hardened through cold working. The material is also readily weldable. The most common product form is round tube, widely used in heat exchangers, water filtration, ship railings, aerospace components, and other industrial applications. Annealed AISI 347H welded pipes offer improved durability and robustness.
