ASTM A240 UNS S32750 Plate

ASTM A240 gr S32750 has better corrosion resistance than stainless steel 904L, in dilute sulfuric acid contaminated with chloride ions. At the grain boundaries during heat treatment; its low carbon content greatly lowers the risk of carbide precipitation; therefore it is highly resistant to carbide-related intergranular corrosion.
The high chromium and molybdenum content of ASTM A240 UNS S32750 Sheet makes it extremely resistant to uniform corrosion by organic acids like acetic and formic acid. It also provides excellent resistance to inorganic acids, especially those which contains chlorides.
ASTM A240 UNS S32760 Plate provides excellent resistance to chloride stress corrosion cracking. Because of its higher alloy content it is superior to UNS S32205 in strength and corrosion resistance. It is mainly used in offshore oil and gas applications and in wells where brine has been injected to enhance recovery or at naturally high brine levels.

SA 240 UNS S32760 Sheet should be solution annealed and quenched either after hot or cold forming. At minimum of 1925°F solution annealing should be done and annealing should be followed immediately by a rapid air or water quench. Heat treated products should be pickled and rinsed to obtain corrosion resistance
S32750 Plate should be hot worked between 1875°F and 2250°F. It should be followed by a solution annealed minimum at 1925°F and a rapid air or water quench. For cold working most common stainless steel forming methods can be used. It has higher yield strength and lower ductility than the austenitic steels so fabricators may use increased radius of bending, high forming forces, and increased allowance for spring back.
UNS S32750 Plate provides good weldability and it can be joined to itself or other materials by gas tungsten arc welding, shielded metal arc welding, plasma arc welding, flux cored wire or submerged arc welding.