New process takes significantly less time than prior heat-treatment processes. Involves placing steel plate directly in furnace and heat-treating. Plate then quenched in slowly moving oil to reduce stresses. Any deflection then pressed out. Possible uses of 4340 steel include new and improved bulletproof vests for military and police personnel and armor for bulletproof automobiles for military, police, diplomatic, and private users. Also used in other military land vehicles as tanks and in both military and civilian aircraft. Lighter armorplate enables land vehicles and aircraft to attain greater speed and maneuverability, consume less fuel, and afford better protection from snipers or terrorists.
Improved Heat Treatment Of Steel Alloy 4340
NASA Tech Briefs ; 17 , 5
1993-05-01
Miscellaneous
No indication
English
DataCite | 1928
STEEL 1.8Ni - 0.8Cr - 0.25Mo (0.38-0.43C) (SAE 4340)
SAE Technical Papers | 1951
STEEL 0.8Cr - 1.8Ni - 0.25Mo (0.38-0.43C) (SAE 4340)
SAE Technical Papers | 1954
STEEL 1.8Ni - 0.8Cr - 0.25Mo (0.38 - 0.43C) (SAE 4340)
SAE Technical Papers | 1949
Tribological and Metallurgical Properties of Nitrided AISI 4340 Steel
SAE Technical Papers | 2014
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