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Mechanical Property Characterization of ESR (Electroslag Remelted) 4353 Steel with a Comparison to ESR 4340 Steel
ARMY LAB COMMAND WATERTOWN MA MATERIAL TECHNOLOGY LAB
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The potential enhancement of ballistic and mechanical properties from electroslag remelting has fostered an interest in mechanical property characterizations of electroslag remelted ESR steels for Army applications. Mechanical property data are presented for quenched and tempered ESR 4353 and ESR 4340 steels. Hardness decreases from 61.1 to 44.4 High Rupturine capacity as tempering temperature increases from 300 to 900 F for ESR 4353 steel. The ESR 4353 steel exhibits Charpy impact energy values of 12.4 ft lb for 400 and 450 F tempers, which decrease to 9.2 ft lb for a 500 F temper as a result of tempered martensite embrittlement. Percent retained austenite decreases to approximately zero as tempering temperature increases to 500 F. Mechanical properties for similarly heat treated ESR 4340 steel are obtained from literature data. Results indicate that for a given tempering temperature or hardness, the ESR 4340 steel has greater Charpy impact energy and fracture toughness.
APPROVED FOR PUBLIC RELEASE