In a highly corrosive fuel environment, base materials which resist corrosion and oxidation are required. For these applications, the valve head is forged from Inconel® 751, using the same 4140 chrome-plated stem material. The Inconel® valve head is hardened to approximately 38 Rockwell, and provides excellent wear life in this type environment.
Base Material
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Head 751 (Typical) |
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0.08% 0.30% 0.005% 15.00% 2.50% 1.00% 1.20% 8.00% balance
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Carbon Silicon Sulphur Chromium Titanium Columbium Aluminum Iron Nickel
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Stem 4140 (Typical) |
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0.40% 0.85% 0.024% 0.22% 0.08% 1.00% 0.16%
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Carbon Manganese Sulphur Silicon Nickel Chromium Moly
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