ASTM A213 TP321 / UNS S32100 Stainless Steel Seamless Tube Pickled and Annealed Heat Exchanger Tube ASTM A213 UNS S32100 / TP321 Pickled and Annealed EN 1.4541 Heat Exchanger Tube is a seamless austenitic stainless steel tube made from titanium-stabilized 18Cr-10Ni stainless steel, grade TP321 / UNS S32100, equivalent to EN 1.4541 / X6CrNiTi18-10. It is supplied in the pickled and annealed (P&A) condition — solution annealed at about 1050–1120°C and then acid pickled to
It's genuine 321H — titanium-stabilized, so no worries about sensitization or intergranular corrosion during welding. Our welder said it welded nicely with no cracking.
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