Type 347 (UNS S34700) and type 348 (UNS S34800) are austenitic chromium-nickel stainless steels containing columbium and tantalum. These grades are recommended where it is preferred to omit the annealing operation after welding. They are also recommended for service at temperatures between 425 and 900 deg C (800 and 1650 deg F). Type 348 is used in applications that require a restricted tantalum content such as those encountered in radioactive service. These types are essentially non-magnetic when annealed and become slightly magnetic when cold worked. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on corrosion resistance as well as forming and heat treating. Filing Code: SS-898. Producer or source: J & L Specialty Steel Inc.

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