High Strength Carburized Gear Steel 14CrMnNi2MoA- TJC STEEL.

​14CrMnNi2MoA is a kind of low alloy high [TJC STEEL]strength structural steels.

Standard
BAR GJB 1951-1994
《Specification for high quality structural steel bars for aviation use》
FORGE PIECE HB 5024-1989
《Steel forgings for aviation》[TJC STEEL]

Component Specification（GJB 1951-1994）
C Cr Ni Mo
0.11~0.17 1.20~1.60 1.40~2.00 0.20~0.40
Si Mn[TJC STEEL] P S
0.35~0.65 0.65~0.95 ≤0.025 ≤0.015

Heat Treatment And Mechanics（GJB 1951-1994）
Dimensions of sample hairs（mm） 16
Heat treatment （℃） Quenching (oil cooling) 820~860
Tempering (air cooling) 180~220
Mechanical property Specified non-proportionality
Extension strength MPa ≥1080
yield  MPa[TJC STEEL] ≥885
Percentage elongation after fracture % ≥12
Percentagereduction of area; reduction of area % ≥55
Impact absorption work J ≥78
Hardness HBS Annealing or high tempering ≤255
Quenching + tempering 321~415

Performance and Application：
14CrMnsNi2MoA is a kind of excellent carburizing steel, which has good hardenability, high strength and impact toughness, good thermal stability, high bending fatigue strength and low notch sensitivity.After carburizing and[TJC STEEL] quenching and low temperature tempering, the surface has a high hardness, and the heart has good strength and toughness.Medium performance in cutting and cold deformation.It is suitable for the manufacture of heavy duty and high speed transmission gear, shaft and other parts requiring surface carburizing.