US2002119070A1PendingUtilityA1

Steel alloys for springs

39
Priority: Dec 21, 2000Filed: Dec 21, 2000Published: Aug 29, 2002
Est. expiryDec 21, 2020(expired)· nominal 20-yr term from priority
Inventors:William I. WilsonDon Baragar
C22C 38/24C22C 38/04C22C 38/06C22C 38/22C22C 38/26
39
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Claims

Abstract

Steel alloy compositions for springs complying with the following specification: 0.51-0.55% by weight of carbon 1.15-1.25% by weight of manganese 0.15-0.30% by weight of silicon 0.90-1.10% by weight of chromium 0.15-0.25% by weight of molybdenum 0.10-0.15% by weight of vanadium 0.015-0.060% by weight of aluminum 0.015-0.030% by weight of niobium 0.008-0.012% by weight of nitrogen and the balance iron and incidental impurities.

Claims

exact text as granted — not AI-modified
1 . A steel alloy consisting of: 
 0.51-0.55% by weight of carbon    1.15-1.25% by weight of manganese    0.15-0.30% by weight of silicon    0.90-1.10% by weight of chromium    0.15-0.25% by weight of molybdenum    0.10-0.15% by weight of vanadium    0.015-0.060% by weight of aluminum    0.015-0.030% by weight of niobium    0.008-0.012% by weight of nitrogen    and the balance iron and incidental impurities.    
     
     
         2 . A spring alloy consisting of: 
 0.53% by weight of carbon    1.20% by weight of manganese    0.22% by weight of silicon    1.00% by weight of chromium    0.20% by weight of molybdenum    0.12% by weight of vanadium    0.037% by weight of aluminum    0.022% by weight of niobium    0.0010% by weight of nitrogen    and the balance iron and incidental impurities.

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