Superelso 690CR, also known as SE 690CR, is a high yield strength, quenched-and-tempered alloy for jack-up legs of offshore drilling platforms. This datasheet provides information on composition and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: SA-577. Producer or source: Industeel USA, LLC.