carbon-and-alloy-steel-4340
4340 alloy steel is a heat-treatable, low-alloy steel renowned for its excellent combination of strength, toughness, and wear resistance. This alloy contains key elements such as chromium, nickel, and molybdenum, which significantly enhance its mechanical properties and performance under demanding conditions. The presence of these elements not only improves the steel’s hardenability but also provides exceptional resistance to fatigue and stress, making it suitable for high-performance applications.
When heat treated, 4340 alloy steel achieves high levels of durability and strength, which are essential for components subjected to heavy loads, impact, and fluctuating stresses.
OUR PRODUCTS
Chemical Composition
| Element | Min | Max |
|---|---|---|
| Carbon, C | 0.35 | 0.45% |
| Manganese, Mn | 0.45 | 0.70% |
| Silicon, Si | 0.10 | 0.35% |
| Nickel, Ni | 1.3 | 1.8 |
| Molybdenum, Mo | 0.20 | 0.35% |
| Chromium, Cr | 0.90 | 1.40% |
| Sulfur, S | -.– | 0.05 |
| Phosphorous, P | -,– | 0.05 |
Mechanical PROPERTIES
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 745 MPa | 108000 psi |
| Yield strength | 470 MPa | 68200 psi |
| Shear modulus (typical for steel) | 80 GPa | 27557–30458 ksi |
| Poisson’s ratio | 0.27–0.30 | 0.27–0.30 |
| Elongation at break | 0.22 | 0.22 |
| Reduction of area | 0.5 | 0.5 |
| Hardness, Brinell | 217 | 217 |
| Hardness, Knoop (converted from Brinell hardness) | 240 | 240 |
| Bulk modulus (typical for steel) | 40 GPa | 20300 ksi |
| Hardness, Rockwell B (converted from Brinell hardness) | 95 | 95 |
| Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only) | 17 | 17 |
| Hardness, Vickers (converted from Brinell hardness) | 228 | 228 |
| Machinability (annealed & cold drawn. Based on 100 machinability for AISI 1212 steel.) | 50 | 50 |
Thermal PROPERTIES
| Properties | Metric | Imperial |
|---|---|---|
| Thermal Expansion Co-efficient (20°C/68°F, specimen oil hardened, 600°C (1110°F) temper | 12.3 µm/m°C | 6.83 µin/in°F |
| Thermal Conductivity (typical steel) | 44.5 W/mK | 309 BTU in/hr.ft².°F |
FEATURES :
- Heat Treatment
- Tempering
- Hardening
- Normalizing
- Soft Annealing
- Forging
contact us today
- Corporate Location – 2nd Floor, Amber Gem Tower, Ajman UAE
- +971 542848454
- info@eliteeximuae.com