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A Design Study in Steel Castings - Steel Plates in BOP Valve                                        

Alloy Selection

Based on the performance requirements, a Nickel-Chrome-Moly low alloy steel (AISI-SAE 8627) was chosen, based on the mechanical requirements at the best alloy cost.
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The 8627 alloy has a nominal composition of--

0.24- 0.31   Carbon  
0.55- 0.70  Nickel
0.35- 0.60  Chromium      
0.15- 0.25  Molybdenum

The 8627 alloy has the following typical mechanical properties, depending on heat treatment-

  • Yield strength = 60-160 ksi
  • Hardness = 175-360 Brinnell


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

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