Product Details:
Usage/Application | Industrial |
Material Grade | SAE 4140 |
Single Piece Length | 3-6 m |
Thickness/Diameter | 1-2 inch |
Material | Alloyed Steel |
Shape | Round |
Technique | Hot Rolled |
4140 is a 1% chromium-molybdenum medium harden ability general purpose high tensile steel-generally supplied hardened and tempered in the tensile range of 850-1000 Mpa (condition T). 4140 available, which greatly increases feeds and/or speeds, while also extending tool life without adversely affecting mechanical properties. Pre hardened and tempered 4140 can be further surface hardened by flame or induction hardening and by nit riding. 4140 is used extensively most industry sectors wide range applications: Adapters, Arbors, Axle Shafts Bolts, Crankshafts, Connection Rods, Chuck Bodies, Collets, Conveyor Pins & Rolls, Ejector Pins, Forks, Gears, Guide Rods, Hydraulic Shafts & Parts, Lathe Spindles, Logging Parts, Milling Spindles, Motor Shafts, Nuts, Pinch Bars, Pins Various, Pinions, Pump Shafts, Rams, Sockets, Spindles, Sprockets, Studs, Tool Holders, Torsion Bars, Worms etc
Machinability:- AISI 4140 alloy steel has good machinability in the annealed condition
Forming:- AISI 4140 alloy steel has high ductility
- It can be formed using conventional techniques in the annealed condition.
- It requires more pressure or force for forming because it is tougher than plain carbon steels
Welding:- AISI 4140 alloy steel can be welded using all conventional techniques
- However, the mechanical properties of this steel will be affected if it is welded in the heat treated condition, and post weld heat treatment should be performed.
Chemical composition:
Element | Min | Max |
---|
Carbon, C | 0.35 | 0.45 |
Manganese, Mn | 0.50 | 0.80 |
Silicon, Si | 0.10 | 0.35 |
Ni | -.-- | -.-- |
Molybdenum, Mo | 0.20 | 0.40 |
Chromium | 0.90 | 1.50 |
Sulfur, S | --- | 0.05 |
Phosphorous, P | --- | 0.05 |
Physical Properties:Properties | Metric | Imperial |
---|
Density | 7.85 g/cm3 | 0.284 lb/in³ |
0.284 lb/in³ | 1416°C | 2580°F |
Mechanical Properties:Properties | Metric | Imperial |
---|
Tensile strength | 655 MPa | 95000 psi |
Yield strength | 415 MPa | 60200 psi |
Bulk modulus (typical for steel) | 140 GPa | 20300 ksi |
Shear modulus (typical for steel) | 80 GPa | 11600 ksi |
Elastic modulus | 190-210 GPa | 27557-30458 ksi |
Poissons ratio | 0.27-0.30 | 0.27-0.30 |
Elongation at break (in 50 mm) | 25.70% | 25.70% |
Hardness, Brinell | 197 | 197 |
Hardness, Knoop (converted from Brinell hardness) | 219 | 219 |
Hardness, Rockwell B (converted from Brinell hardness) | 92 | 92 |
Hardness, Rockwell C (converted from Brinell hardness Value below normal HRC range, for comparison purposes only) | 13 | 13 |
Hardness, Vickers (converted from Brinell hardness) | 207 | 207 |
Machinability (based on AISI 1212 as 100 machinability) | 65 | 65 |
Thermal Properties:Properties | Metric | Imperial |
---|
Thermal expansion co-efficient (@ 0-100°C/32-212°F) | 12.2 µm/m°C | 6.78 µin/in°F |
Thermal expansion co-efficient (@ 0-100°C/32-212°F) | 42.6 W/mK | 296 BTU in/hr.ft².°F |