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Special Alloy Steel Solid Bar AISI4140 OD 1-1/2" To 15" Length 6m
Special alloySteel AISI140 Introduction
AISI 4140 belongs to ultra-high strength steel, implemented standard: ASTM_A29/A29M (forged and cold-worked carbon steel and alloy steel bars)
AISI 4140 has high strength and toughness, good hardenability, no obvious temper brittleness, high fatigue limit and resistance to multiple impact
after quenching and tempering, and good impact toughness at low temperature. The steel is suitable for manufacturing large and medium-sized
plastic moulds which require certain strength and toughness.
The chemical composition of AISI 4140 is shown below:
| Element | C | Si | Mn | P | S | Cr | Mo |
| Minimun Value | 0.38 | 0.15 | 0.75 | / | / | 0.8 | 0.15 |
| Maximum Value | 0.43 | 0.35 | 1 | 0.035 | 0.04 | 1.1 | 0.25 |
Scope of application:
High strength, hardenability, good toughness, small deformation during quenching, high creep strength and durable strength at high temperature.
Used in the manufacture requirements higher than 35CrMo steel strength and conditioning section more large forgings, such as locomotive
traction with the big gear, supercharger drive gear, pressure vessel, rear axle, gear load connecting rod and a spring clip, 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 AISI Alloy 4140 Steel Bar, Plates, Square
| 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 |
| Poisson’s 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 |
Company Introduce
FORUS company is engaged exporting oil drilling machine and equipment. Our goal is to meet customers’ different requirements, supply high
quality products with best price.
We has a professional team to provide efficiently service, quickly action. Integrity is the cornerstone of our development. Our equipments have
exported many countries, including Kuwait, UAE., Egypt, Indonesia, Russia, USA, Kazakhstan etc., and we are widely praised by our clients.
