Alloy Steel 4140 | UNS# G41400 contains chromium, molybdenum, and manganese and is an excellent material choice for many various applications due to its toughness, high fatigue strength, and abrasion and impact resistance. Few grades match the versatility of 4140. AISI 4140 demonstrates good atmospheric corrosion resistance and shows good combinations of toughness, strength, fatigue and wear resistances. Because of these desirable characteristics, AISI 4140 is often used as forgings in the aerospace, oil & gas , agricultural, and defense industries.
Alloy Steel 4140 Specifications:
Alloy Steel 4140 product forms offered at all Titanium Industries’ locations:
Alloy Steel 4140 Applications:
- Commercial and Military Aircraft
- Automotive
- Oil & Gas
- Agricultural
- Forged Gears and Shafts
DISCLAIMER: Alloy data sheets are for reference only, not for design purposes.
| Chemical Composition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Fe 97.0% | Cr 1.0% | Mn 0.90% | C 0.40% | Si 0.25% | |||||
| Mo 0.20% | S 0.05% | P 0.04% | |||||||
| PHYSICAL PROPERTIES | ||||||
|---|---|---|---|---|---|---|
| Density | Electrical conductivity (% IACS) | Thermal conductivity (BTU-in/hr-ft²-°F) | Specific heat capacity | Thermal expansion (1/°F) | Melting Point (°F) | |
| 0.284 | 7.84 | 396 | 0.113 | 0.00000678 | 2580 | |
| Mechanical Properties | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Property | Minimum | Maximum | |||||||
| Yield Strength Range (Rp0.2 Offset) (ksi) | 60.2 | 95 | |||||||
| Tensile Strength Range (Rm) (ksi) | 95 | 107.3 | |||||||
| Elongation (AL=5 x Ø) | 17.7% | 25.7% | |||||||
| Brinell Hardness (H) | 197 | 578 | |||||||
| Modulus of Elasticity (ksi) (E): 29700 | |||||||||
| Machineability General Index: 66% | |||||||||
T.I. Approvals:
Plus a wide range of approvals from most leading OEM’s across Aerospace, Medical, Industrial, and Oil and Gas markets.