AISI 8642 is a triple-alloy steel that can be hardened by austenitizing and quenching in oil. This steel has moderate hardenability with relatively high strength and toughness, especially in the quenched-and-tempered condition. It is used in a wide range of components, parts and tools; examples are bolts, shafts, gears, wrenches, axles and housings. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on heat treating, machining, joining, and surface treatment. Filing Code: SA-440. Producer or source: Alloy steel mills and foundries.

UNS No. G86500 is a triple-alloy steel designed for highly efficient utilization of the alloying elements to increase hardenability and strength. It is an oil-hardening type and is suitable for many machine and tool components. Specific applications include gears, shafts, bolts, wrenches, studs and tool forgings. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-407. Producer or source: Alloy steel mills and foundries.

SAE 8642 is a triple-alloy steel that can be hardened by austenitizing and quenching in oil. This steel has moderate hardenability with relative high strength and toughness, especially in the quenched-and-tempered condition. It is used in a wide range of components, parts and tools; examples are bolts, shafts, gears, wrenches, axles and housings. 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: SA-382. Producer or source: Alloy steel mills and foundries.

AISI 4142 is a medium-carbon low-alloy steel recommended for moderately heavy-duty service. It is nominally an oil-hardening grade; however, it may be water hardened if suitable precautions are taken to avoid cracking. It has a relatively low tendency to develop temper embrittlement. It has a variety of applications including bolts, crankshafts, wrenches, clutch parts and shafting. 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, and joining. Filing Code: SA-370. Producer or source: Alloy steel mills and foundries.

AISI 5155 is a low-alloy, through-hardening steel containing nominally 0.80% chromium. It is recommended for uses where medium harden-ability, moderate strength and low-to-moderate toughness are satisfactory. It is normally used in the oil quenched-and-tempered condition; however, it also may be used in the unhardened (annealed, as-rolled or normalized) condition. Its applications include gears, springs, wrenches and machine tool parts. 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: SA-365. Producer or source: Alloy steel mills and foundries.