4140 Steel
Our 4140 alloy steel forgings have high tensile strength (tensile strength ≥ 1080 MPa), high yield strength, high fatigue resistance, high impact resistance after proper quenching and tempering. With these superior properties, our 4140 forgings are suitable for manufacturing various critical components.
4140 Steel Forgings Applications:
4140 alloy steel forgings are low-alloy structural steel forgings, classified as medium hardenability steel forgings. 4140 alloy steel forgings exhibit low quenching deformation and maintain excellent creep strength even at high temperatures. Our 4140 alloy steel forgings have high tensile strength (tensile strength ≥ 1080 MPa), high yield strength, high fatigue resistance, high impact resistance after proper quenching and tempering. With these superior properties, our 4140 forgings are suitable for manufacturing various critical components.
- Machinery: Hydraulic cylinder rods, gears, spindles, tie rods, driving shafts.
- Oil & Gas: Drill collars, drill pipes, stabilizers, shafts, valves, fittings, pumps, and downhole tools.
- Automotive Manufacturing: Gearbox gears, connecting rods, torsion bars, axles.
- Mold Industry: Injection mold bases, die casting mold cores.
- Power Generation: Turbine shafts, rotors, blades, vanes, casings.
4140 Steel Forgings Features：
After proper heat treatment, 4140 alloy steel forgings possess the following properties:
- High Strength & Toughness:
4140 steel forgings have high tensile strength, high yield strength, torsional strength, and high impact resistance.
- High Temperature Resistance:
4140 steel forgings have high hardenability, high wear resistance, and high creep strength at high temperatures (up to ~1000°F).
- Fatigue Resistance:
4140 forged steel parts have excellent resistance to fatigue. 4140 steel forgings can bear cyclic loading.
- Fine Grain Structure:
4140 steel forgings have fine grain structure and have consistent properties after the hot forging.
- Versatile Heat Treatment:
4140 steel forgings can achieve specific hardness levels and enhanced wear resistance after proper hardening and tempering.
- Good Machinability:
4140 steel forgings have good machinability. It is easy for you to do the machining work to 4140 forgings.
- Ductility:
4140 alloy steel forgings have good ductility after quenching and tempering.
4140 Steel Properties
AISI 4140 alloy steel physical properties information table.
| Properties | Metric | Metric Imperial |
|---|---|---|
|
Density |
7.85 g/cm3 |
0.284 lb/in³ |
|
Melting point |
1416°C |
2580°F |
AISI 4140 alloy steel mechanical properties information table.
| Properties | Metric | Metric Imperial |
|---|---|---|
|
Tensile strength |
655 MPa |
95000 psi |
|
Yield strength |
415 MPa |
60200 psi |
|
Elongation at break (in 50 mm) |
25.70% |
25.70% |
|
Hardness, Brinell |
197 |
197 |
|
Machinability (based on AISI 1212 as 100 machinability) |
65 |
65 |
AISI 4140 alloy steel thermal properties information table.
| Properties | Metric | Metric Imperial |
|---|---|---|
|
Thermal expansion coefficient (@ 0-100°C/32-212°F) |
12.2 µm/m°C |
6.78 µin/in°F |
|
Thermal conductivity (@ 100°C) |
42.6 W/mK |
296 BTU in/hr.ft².°F |
4140 Steel Chemical Composition
AISI 4140 alloy steel chemical composition information for reference.
| Steel Grade | Carbon, C | Silicon, Si | Manganese, Mn | Phosphorous, P | Sulfur, S | Chromium, Cr | Molybdenum, Mo | Iron, Fe |
|---|---|---|---|---|---|---|---|---|
|
4140 |
0.380 – 0.430 |
0.15 – 0.30 |
0.75 – 1.0 |
≤0.035 |
≤0.040 |
0.80 – 1.10 |
0.15 – 0.25 |
Balance |
4140 Steel Equivalent
AISI 4140 alloy steel chemical composition information for reference.
| EU EN | USA |
Germany DIN,WNr |
France AFNOR |
Italy UNI |
Spain UNE |
Inter ISO |
|---|---|---|---|---|---|---|
|
42CrMoS4 (1.7227) |
4140 |
42CrMoS4 |
42CD4u |
42CrMo4 |
40CrMo41 |
42CrMoS4 |
4140 Steel Forgings Manufacturer
We are a leading 4140 steel forgings manufacturer and supplier in China.
Our 4140 steel forgings have high strength, high toughness, good wear & corrosion resistance, good ductility, and good machinability. They are ideal blank material for the shafts, gears, fasteners, hydraulic cylinder rods, etc.
Our 4140 steel forgings are widely used across industries, including the heavy machinery, rail transit, and energy industries.
Contact us for more information now.
WhatsApp: 0086 183 1708 9408 | E-mail: steve@well-forge.com
Open Die Forging & Ring Rolling Forging
We possess multiple free forging machines and ring rolling machines. Our free forging machines includes a 1-ton air hammer, a 2-ton hydraulic hammer, a 5-ton hydraulic forging machine, a 3500-ton hydraulic forging machine, and multiple ring rolling machines.
Our custom forged parts can weigh up to 20,000 kg and have a maximum length of 20 m. The outer diameter of the forged rings can reach 4.5 m.
Why Choose Shanghai FAR WELL?
We are professional steel forging company in China for forged steel parts. Our factory is 200KM away from Shanghai Port. We are a modern management steel forging company targeting the international market.
- One Station Service
- Quality Products
- Competitive Price
- Professional Service
- On-time Delivery
Custom Forged Parts
