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Super 13Cr is a supermartensitic stainless steel predominantly designated as UNS S41426 (along with the associated variant UNS S41425). Classified under ISO 13680 / API 5CRA as Group 1 Category 13-5-2, this corrosion-resistant alloy is engineered specifically for seamless oil country tubular goods including casing, tubing, coupling stock, and accessory materials. It is supplied in…