Our duplex sprocket forging made of 4340 forging in condition W has tensile strength range from 1080 MPa to 1230 MPa. The yield strength range is from to. And the Charpy Impact J (min.) can be 35. The Brinell Hardness HB is from 311 to 375. Because of the excellent mechanical properties, 4340 forging in condition W is the ideal material for sprockets.
AS 4340 forging is 1.8% nickel – chromium – molybdenum high hardenability high tensile steel forging- generally supplied hardened and tempered.
