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Stainless Steel 440 C    No Related Metal names.  
   
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  Chemistry Data  
  There is no chemistry data available for this grade.  
   
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  Principal Design Features    This is a high carbon martensitic stainless with moderate corrosion resistance good strength and the ability to obtain and keep excellent hardness (Rc 60) and wear resistance.  
   
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  Applications    Ball bearings and races, gage blocks, molds and dies, cutlery, valve components, knives and measuring instruments.  
   
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  Machinability    Best machined in the annealed condition. Tough, stringy chips can be best handled by the use of chip breakers. Carbide or ceramic tooling is recommended.  
   
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  Welding    This alloy is not commonly welded due to its tendency to air harden. If it must be welded, preheat to 500 F (260 C) and post weld treat at 1350-1400 F (732-760 C) for 6 hours followed by a slow furnace cooling to avoid cracking. Use similar filler metal and high heat inputs during operations.  
   
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  Hot Working    Pre-heat to 1400 F (760 C), then bring slowly up to 1900-2200 F (1038-1204 C)before proceeding. Do not work this material below 1700 F (927 C). Cool material slowly after working and once at room temperature, anneal fully.  
   
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  Cold Working    This alloy is considered only slightly cold workable by common practices.  
   
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  Annealing    1550-1600 F (843-871 C), followed by very slow furnace cooling.  
   
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  Tempering    For maximum properties, soak at 300 F (148 C). Maximum obtainable hardness is RC 60.  
   
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  Hardening    Bring the material slowly up to 1400 F (760 C), then on to a soak temperature of 1850 F (1010 C), air or oil cool.  
   
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  Mechanical Data  
  There is no Mechnical data available for this grade.  
   
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  Disclaimer
This information is provided "as is" and Principal Metals, Inc. makes no warranty of any kind with respect to the subject matter or accuracy of the information contained herein. Principal Metals, Inc. specifically disclaims all warranties, expressed, implied or otherwise, including without limitation, all warranties of merchantability and fitness for a particular purpose.
In no event shall Principal Metals, Inc. be liable for any special, incidental, indirect or consequential damages of any kind or any damages whatsoever resulting from loss of use, data, profits, whether or not advised of the possibility of damage, and on any theory of liability, arising out of or in connection with the use of the information contained herein.

This publication may include technical inaccuracies or typographical errors. Changes may be periodically made to the information herein.
 


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