AISI 1139 is a carbon steel containing 1.35-1.65% manganese and 0.13-0.20% sulfur to furnish free-machining characteristics. It is recommended especially for high-production machined products. Among its many applications are splined shafts, screws, arbors, tool holders and propeller shafts. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: CS-82. Producer or source: Carbon steel mills.

Mecasteel 145 (minimum yield strength 145 ksi) is a high-strength prehardened steel that can be used in substitution for conventional steels, such as AISI 4330, in the manufacture of massive steel components such as machines, hydraulic systems, and pumps. This datasheet provides information on composition and tensile properties as well as fracture toughness. It also includes information on forming. Filing Code: SA-691. Producer or source: Industeel USA, LLC. Revised as Alloy Digest SA-703, July 2014.

Type 302 (UNS S 30200) stainless steel is an austenitic chromium-nickel stainless steel, nonhardenable by thermal treatments. It may be cold worked to high tensile strengths with slightly lower ductility than type 301. Its corrosion resistance is superior to that of type 301. Type 302 is essentially nonmagnetic in the annealed condition and becomes slightly magnetic when cold worked. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-779. Producer or source: J & L Specialty Steel Inc.