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Vol.21, No.11, 1061 ~ 1069, 1983
Title
The Effects of Substituting W for Mo on Mechanical Properties in AISI 4340 Alloy Steel
박창남C . N . Park, 강석봉S .B . Kang, 김영길Y . G . Kim
Abstract
The effects of substituting W for Mo on Mechanical Properties in a quenched and tempered martensitic AISI 4340 steel were investigated. The alloys containing 0.3-0.6 w/o W exhibited 35-75% increase at room temperature in impact toughness over the alloy containing 0.25% Mo after tempered at 600℃. However, the yield strength and the ultimate tensile strength were not increased significantly by substituting W for Mo. The mechanical properties were not improved greatly the W content exceeded about 0.4 w/o. Therefore it is recommended that 0.3-0.4 w/o W is suitable for optimizing the strength and the toughness when substituting W for Mo in AISI 4340 steel.
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