فولاد آلیاژی 4340
فروش فولاد آلیاژی 4340
مرکز پخش فولاد آلیاژی 4340
Typical Analysis |
C |
Mn |
P |
S |
Si |
Ni |
Cr |
Mo |
.40 |
.70 |
.020 |
.020 |
.25 |
1.80 |
.80 |
.25 |
|
Characteristics |
- Richly alloyed heavy-duty steel, this nickel-chromium- molybdenum alloy possesses much deeper hardenability than the 4100 series, with increased ductility and toughness. These advantages are realized principally where high strength is required in heavy sections.
- Also the high fatigue strength of 4340 makes it ideal for all highly stressed parts in the most severe conditions. It may be used in both elevated and low temperature environments; and has good wear resistance.
- For special service conditions or where material may be subject to magnetic particle inspection we stock Aircraft Quality E-4340 to MIL-S- 5000 and AMS 2301 in condition E.I (Hot rolled Normalized and Tempered) to HB 235 max. AISI 4340 is stocked in the heat treated and stress-relieved condition at approximately 150,000 psi (1034 N/mm2) and in the annealed condition at HB 235 max.
|
Typical Applications |
- High strength machine parts, heavy-duty shafting, high tensile bolts and studs, gears, axle shafts, crankshafts, boring bars and down-hole drilling components
|
Typical Heat Treatment |
- Forging
- Commence 1200℃ max.
- Finish 950℃
- Normalizing
- Hardened & Tempered: (Owing to the air-hardening properties of AISI 4340, normalizing is not recommended except when followed by tempering.) 810℃/860℃. Oil quench.
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Mechanical Properties |
- Annealed Typical
- Tensile Strength – 80,000 psi
- Yield Strength – 80,000 psi
- Elongation – 28%
- Reduction of Area – 57%
- Hardness – 22 Rc Max, surface
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