Material specifications Material specifications sudha954541 (Materials) (OP) 19 Sep 14 05:31 Could any one please tell me AISI 4115 material properties and applications RE: Material specifications CoryPad (Materials) 19 Sep 14 10:03 The properties will depend on the heat treatment. A typical application would be a gear that is case carburized. RE: Material specifications OGMetEngr (Materials) 19 Sep 14 18:37 The 41xx series is a low alloy steel with a small amount of chromium and molybdenum added for increased depth of strength/hardness. The last two numbers (15) represent nominal carbon content of 0.15%. Strength/hardness and ductility, as well as most other mechanical properties will vary with thermomechanical history (heat treatment, hot/cold working). Take a look at ASTM A500, the strength of this alloy will be similar to a 1015 carbon steel only greater thickness capability. RE: Material specifications OGMetEngr (Materials) 19 Sep 14 19:05 My mistake, it's ASTM A400.