Journal of Heat Treating

, Volume 7, Issue 1, pp 49–55 | Cite as

Mechanical property characterization of ESR 4353 steel with a comparison to ESR 4340 steel

  • Timothy S. Thomas
  • Charles F. Hickey


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 HRC as tempering temperature increases from 300 to 900° F for ESR 4353 steel. Correspondingly, fracture toughness (K IQ) increases from 23.4 ksi √in. to 89.7 ksi √in. The ESR 4353 steel exhibits Charpy impact energy values of 12.4 ft-1b 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. The percentage of 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 (K IQ).


Austenite Martensite Fracture Toughness Retain Austenite Charpy Impact Energy 
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Copyright information

© Springer-Verlag New York Inc 1989

Authors and Affiliations

  • Timothy S. Thomas
  • Charles F. Hickey
    • 1
  1. 1.Material Exploitation DivisionU.S. Army Materials Technology LaboratoryWatertownUSA

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