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Skype: tjccarl
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.