Alloy Engineering Steel Bar EN24/4340/SNCM439/40CrNiMo
Alloy Engineering Steel Bar EN24/4340/SNCM439/40CrNiMo
Product Introduction
4340 alloy steel bar is used heavily in the aerospace industry due to its ultra-high strength. When heat treated it is known for its toughness while preserving good fatigue strength. For highly stressed parts it is excellent choice. It can be machined by all customary methods. This material is available in both vacuum melt (VM) and air melt (AM)
EN24 Engineering Steel is easy to treat and temper and is supplied hardened and tempered. The alloy offers a good combination of strength, ductility and wear resistance. It is a very high strength alloy engineering steel.
Chemical Composition
| Carbon | 0.38-0.43 |
| Manganese | 0.60-0.80 |
| Phosphorus (max) | 0.035 |
| Sulfur (max) | 0.04 |
| Silicon | 0.15-0.35 |
| Nickel | 1.65-2.00 |
| Chromium | 0.70-0.90 |
| Molybdenum | 0.20-0.30 |
Heat Treatment
| Quenching | Tempering | ||||
| Heating Temperature/℃ | Cooling | Hardness/HRC | Heating Temperature/℃ | Cooling | Hardness/HRC |
| 820-840 | Oil | ≥53 | 450-650 | Air | 25-40 |
Mechanical Properties
| Tensile strength (psi) | 105,000 - 115,000 |
| Yield strength (psi) | 75,000 - 85,000 |
| Elongation in 2” (%) | 20 - 30 |
| Reduction of area (%) | 35 - 45 |
| Brinell Hardness (BHN) | 210 - 240 |
General Applications
- Aircraft Landing Gear
- Power Transmission Gears
- Structural Use Applications
Evergrowing Resources CO.,Ltd
Evergrowing Resources Co., Limited was Located in Nanjing, China. We have engaged in import and export of all kinds of ferrous and nonferrous materials all over the world. Because we are top agent of several different steel mills in Asia and Europe, so we have ability to offer best quality products and services to our clients. Till now, we have supplied products and services in Asia, Europe, Africa, North America and South America. Following the trend of market development, we have built our special steel processing center in Jiangsu, China to do further processing on the products, such as heat treatment (QT, N, ANN), rough turned, CNC cutting and etc. We have extended our industrial train and enhanced the ability to provide the auxiliary item, and thus strengthened our market advantage.
Evergrowing aim:
Competitive price: try best to make best offer
Top quality: 100% comply with customer's standard
JIT delivery: Delivery on time for each order.
One station purchase:we try to supply the material with different condition to our customers.
After service: Response on any quality question and etc.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.