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| Fe 96.785 - 97.77 | Si 0.15 - 0.30 | MN 0.75 - 1.0 | S 0.040 | P 0.035 | Cr 0.80 - 1.10 | C 0.380 - 0.430 | Mo 0.15 - 0.25 |
Virat Special Steels is the biggest Supplier & Stockiest of AISI 4140.
AISI 4140 is 1% chromium - molybdenum medium harden capability basic cause excessive tensile metal.
Its pre hardened and tempered & can be extra surface hardened by flame or induction hardening and by means of nitriding.
4140 is a 1% chromium - molybdenum medium hardenability general purpose high tensile steel - usually provided hardened and tempered in the tensile range of 850 - 1000 Mpa (condition).4140 is currently out there with improved machinability, that greatly increases feeds or speeds, while also extending tool life while not adversely affecting mechanical properties.
| Thermal Conductivity at °C | 20 | 350 | 700 |
| W/(m*K) | 42.0 | 42.2 | 42.4 |
This alloy finds many applications as forgings for the aerospace and oil and gas industries, along with myriad uses in the automotive, agricultural and defense industries, typical uses are forged gears and shafts, spindles, fixtures, jigs and collars.
| Soft annealing °C | Cooling | Hardness HB |
|---|---|---|
| 680-720 | Furnace | max. 241 |
| Stress-relief annealing °C | Cooling |
|---|---|
| 550-600 | Furnace |
