CarTech No. 158 alloy is a chrome-nickel alloy steel with an analysis representing the best case hardening steel known for parts subject to heavy shock and wear.

This alloy is ideally suited for jobs where an extra measure of core strength is required. Fully treated, CarTech No. 158 alloy attains a core strength of approximately 160 ksi (1103 MPa) tensile strength with a yield point of approximately 135 ksi (931 MPa). These high mechanical properties will be developed in sections up to 5" (127 mm) thick. In addition, case hardened articles possess a higher wear resistant case because of the special alloy content of the steel.

Applications:
CarTech No. 158® alloy should be considered for use in very large parts requiring maximum strength, wear resistance, and toughness. Typical applications have included heavy-duty gears, shafts, clutch parts, piston pins, chain rollers, chain bushings, wrist pins, boring bars, cutting shanks, jig bars, clutch levers, ratchets, power tool shafts, power tool cams, rock drill assemblies, balls, arbors, broach holders, clutch pins, pneumatic tool parts, and rolls for aluminum rolling machines.

This alloy should also be considered for use in replacement parts for finished assemblies where the load on a particular part has been underestimated or where space or weight limitations prevent redesigning for heavier parts. Breakage at such troublesome spots can frequently be eliminated through the use of CarTech No. 158 alloy.