An Example in Steel Casting    Traction Motor Rotor Disc

AISI-SAE 1023 Steel Alloy Composition

The OEM specifications originally called for a  low carbon steel (AISI-SAE 1015)  based on the mechanical requirements.
    The 1015 alloy has a nominal % composition of--                                                           
        0.13- 0.18 Carbon       0.30- 0.60 Manganese     0.040 Max Phosphorus      0.050 Max Sulfur

But that specific carbon level in the 1015 steel has insufficient fluidity at the pour temperature for smooth and rapid metal flow into this complex mold.  

Huron Casting suggested an  alternate alloy (AISI-SAE 1020) with a higher carbon level  (0.17%-0.23%), but the same levels of manganese, phosphorus, and sulfur.  There is no loss of mechanical properties.

  • The higher carbon level reduces the melt temperature and will give improved fluidity in the mold at the pour temperature (2830F-2870F). 

The higher carbon content will increase fluidity and provide better fill in thin wall sections of the mold.


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Copyright 2003  by the Steel Founders' Society of America   All rights reserved. 
Address comments to: blairr@sfsa.org
Last Modified    :June, 2003 by STG

In cooperation with
 Huron Casting