AMS 2759/6 & AMS 2759/10
Gas Nitriding is a surface hardening process in which nitrogen is added to the surface of steel using dissociated ammonia as the medium. The result is a very hard vase component achieved using a low temperature and alleviating the need for quenching. Recent developments utilizing computer control of the atmosphere have led to a process that can be accurately controlled. The thickness and phase formation of the Nitriding layer can now be selected and precisely maintained.
As with other nitriding processes, Gas Nitriding is carried out at temperatures below what would be required to transform alloy steel. When combined with the proper manufacturing techniques, minimal distortion is observed at these lower temperatures. This results in a very high strength product with extremely good wear resistance. Additionally, Gas Nitriding permits large batch sizes, meaning furnace and gas flow are the sole limitations.
The typical temperature range is 925F – 1050F
Nitriding is commonly used in various industrial processes due to its formation of hard and wear-resistant surface layers, enhancing the mechanical properties of the treated materials. In the automotive, aerospace, and oil & gas industries, important components such as gears, camshafts, extruder screws, die-casting tools, and pump components benefit from gas nitriding by improving wear resistance and strength. In the medical equipment industry, gas nitriding is used due to its corrosion resistance qualities for stainless steel surgical instruments and orthopedic implants, leading to longer-lasting medical devices. These are just a few of the many industries Aalbert’s nitriding services can enhance.
AMS 2759/8
In the 1980’s the first commercial application of the Ion Nitriding process was introduced into the United States. This technology utilized a combination of vacuum, voltage, temperature and gas flow controllers that precisely control the final Nitriding phase. In recent years, Ion Nitriding equipment manufacturers have made significant modifications in equipment, electronics and software design. Aalberts surface technologies uses Pulse Plasma Generators that utilize the most current technology available. These advances in technology have allowed us to increase the tool performance and the value of our customer’s finished products to above market standards.
Ion Nitriding has proven to significantly enhance material fatigue and strength. It is particularly well-suited for applications where heat checking and mechanical shock are common. The depth and hardness of the case formed during nitriding are influenced by factors such as the steel's chemistry, gas composition, and voltage manipulation.
At Aalberts Surface Technologies we utilize Pulse Plasma Generators that incorporate the latest technology available. These advancements have greatly improved tool performance and increased the value of customers' finished products to exceed market standards.
The typical processing temperature is 850°F – 1100°F (480°C – 580°C)
Working Dim: 39” x 60”; Load Capacity 9,000 lbs.
Working Dim: 60” x 94”; Load Capacity 15,000 lbs.
Working Dim: 60” x 80”; Load Capacity 15,000 lbs.
Download Information Packet: Plasma Nitriding of Stainless Steels
| Process | Gamma Prime |
| Micro Hardness HV .01 | 900-1200 |
| Case Depth | 2-10µm |
| Max Working Temp. (Oxid) | < 600°C |
| Properties | Pitting and abrasive wear |
| Main Use | Gear & shear applications |
| Process | Epsilon |
| Micro Hardness HV .01 | 900-1250 |
| Case Depth | 2-10µm |
| Max Working Temp. (Oxid) | < 600°C |
| Properties | Abrasive wear resistance/galling |
| Main Use | Metal Forming/Gears |
| Process | Diffusion |
| Micro Hardness HV .01 | 900-1100 |
| Case Depth | .002″ – .020″ |
| Max Working Temp. (Oxid) | < 600°C |
| Properties | Impact and wear resistance |
| Main Use | Forging & Stamping |
| Process | S-Phase |
| Micro Hardness HV .01 | 900-1100 |
| Case Depth | 2-25-µm |
| Max Working Temp. (Oxid) | < 500°C |
| Properties | Improves wear and corrosion resistance |
| Main Use | Aerospace, Medical, Oil/Gas |
Feed Screw, Coining Die, Fuel Injector, Military Weapon Components, Scalpels
AMS 2759/8
The S-Phase increases the hardness of the surface and case depths up to 25 microns depending on the alloy. Typical materials are 300 series, PH series and Duplex stainless steels. In an effort to meet the high demands for a low fatigue, wear resistant stainless steel, Ionic Technologies has developed a proprietary method called Ionic Diffusion SS.
Download Informational Packet: Plasma Nitriding of Stainless Steels
| Process | S-Phase |
| Micro Hardness HV .01 | 900-1100 |
| Case Depth | 2-25-µm |
| Max Working Temp. (Oxid) | < 500°C |
| Properties | Improves wear |
| Main Use | Aerospace, Medical, Oil/Gas |
Increased surface hardness to 1000 – 1200 HV 0.05 (70 – 74 HRc). Typical materials include A286, 300 series and Duplex stainless steels.
Stainless steel components for oil & gas exploration, hip implant, valve stem, ferrules, actuator control valve for petrol chemical processing.
