Influence of Aluminum and Aluminum Plus Silicon Additions on the Mechanical Properties of AISI 4340 Steel

Conference · Tue Feb 01 04:00:00 EST 1977

OSTI ID:7309086

Bhat, M. S. ^[1]

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1. Lawrence Berkeley Laboratory (LBL), Berkeley, CA (United States); University of California, Berkeley, CA (United States)

The softening which occurs on tempering AISI 4340 steel is shown to be retarded by additions of aluminum or combinations of aluminum and silicon. The ''500°F embrittlement'' phenomenon in AISI 4340 steel occurs at higher tempering temperatures in the presence of aluminum and aluminum plus silicon in the steel. Significant improvements in the fracture toughness of low/medium alloy heat treatable steels are possible without a loss in strength through aluminum or aluminum plus silicon additions.

• Research Organization: University of California, Berkeley, CA (United States); Lawrence Berkeley Laboratory (LBL), Berkeley, CA (United States)
• Sponsoring Organization: US Energy Research and Development Administration (ERDA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7309086
• Report Number(s): LBL--4920; CONF-760398-1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
EMBRITTLEMENT
FRACTURE PROPERTIES
HARDNESS
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
NICKEL ALLOYS
NICKEL STEELS
SILICON ALLOYS
STEELS
YIELD STRENGTH