AISI 4140 Alloy Steel
AISI 4140 Alloy steel material stockholders and suppliers from China-OTAI SPECIAL STEEL . we have more 16 years experience in 4140 steel plate, round bar, flat bar, square supply.AISI 4140 alloy steel is chromium, molybdenum, manganese containing low alloy steel. It has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength. The following datasheet gives an overview of AISI 4140 alloy steel
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Description
AISI 4140 Alloy steel material stockholders and suppliers from China-OTAI SPECIAL STEEL . we have more 16 years experience in 4140 steel plate, round bar, flat bar, square supply.AISI 4140 alloy steel is chromium, molybdenum, manganese containing low alloy steel. It has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength. The following datasheet gives an overview of AISI 4140 alloy steel.
4140 alloy steel material is a high quality Quenched and Tempered Alloy Structural steel, It belong to the high quality medium carbon alloy steel, Oil Quenched & Tempered Hardenss is 28-34 HRC.4140 Annealing delivery hardenss less than 250HB.
Applications
DIN 4140 Tool steel is a alloy structural steel, 4140 is used for engineering structural, like high tensile shafts, bolts and nuts, gears, pinions and spindles. Locomotive traction with the big gear, supercharger drive gear, pressure vessel, rear axle, gear load of connecting rod and a spring clip,4140 can also be used to under 2000 m deep well of oil drill pipe joint and the fishing tool, and can be used for bending machine mould, etc
Mechanical Properties of 4140 alloy steel
| Properties | Metric | Imperial |
| 1.Tensile strength | 655 MPa | 95000 psi |
| 2.Yield strength | 415 MPa | 60200 psi |
| 3.Bulk modulus (typical for steel) | 140 GPa | 20300 ksi |
| 4.Shear modulus (typical for steel) | 80 GPa | 11600 ksi |
| 5.Elastic modulus | 190-210 GPa | 27557-30458 ksi |
| 6.Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| 7.Elongation at break (in 50 mm) | 25.70% | 25.70% |
| 8.Hardness, Brinell | 197 | 197 |
| 9.Hardness, Knoop (converted from Brinell hardness) | 219 | 219 |
| 10.Hardness, Rockwell B (converted from Brinell hardness) | 92 | |
| 11.Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only) | 13 | 13 |
| 12.Hardness, Vickers (converted from Brinell hardness) | 207 | 207 |
| 13.Machinability (based on AISI 1212 as 100 machinability) | 65 | 65 |
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.
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