UGI® 4116N Annealed Stainless Steel – Superior Corrosion Resistance & Hardness
The high carbon and nitrogen content of UGI® 4116N leads to a very attractive corrosion resistance versus hardness properties. It can replace grades 1.4112 / 1.4125 (AISI 440B and 440C) in many applications.
Processing similar to type 1.4034 (AISI 420) stainless steel, therefore much easier than 1.4112 / 1.4125 (AISI 440B and 440C)
Recommended applications: pins, shafts, nozzles, wear resistant parts, etc. as a replacement of 1.4112/1.4125 or AISI 440B / 440C.
Possible mechanical properties after treatment on parts:
The following Table summarizes the mechanical properties at room temperature which may be obtained after heat treatment on parts:
Properties
General
| Property | Value |
|---|---|
Density | 7.7 g/cm³ |
Mechanical
| Property | Value |
|---|---|
Elastic modulus | 215 GPa |
Hardness, Vickers | 210.0 |
Thermal
| Property | Value | Comment |
|---|---|---|
Coefficient of thermal expansion | 0.0000112 1/K | 20 to 300°C |
Thermal conductivity | 30 W/(m·K) |
Electrical
| Property | Value |
|---|---|
Electrical resistivity | 6.5e-07 Ω·m |
Chemical properties
| Property | Value | Comment |
|---|---|---|
Carbon | 0.48 - 0.55 % | |
Chromium | 14.0 - 15.0 % | |
Manganese | 1.0 | max. |
Molybdenum | 0.8 % | |
Nitrogen | 0.05 - 0.15 % | |
Phosphorus | 0.04 | max. |
Silicon | 1.0 | max. |
Sulfur | 0.015 | max. |
Vanadium | 0.1 - 0.15 % |
Technological properties
| Property | ||
|---|---|---|
| Application areas | Parts (pins, shafts, nozzles…) already made with 4112/4125 or 440B/C…High hardness re-quirements with a rather good corrosion resistance. | |
| Corrosion properties | The pitting corrosion resistance is better in the Tempered than in the Annealed condition, a feature that is similar for all high-carbon martensitic grades | |
| General machinability | Machinability: UGI® 4116N can be machined in the annealed condition. The machinability of UGI® 4116N is comparable to that of grade 1.4034 and significantly better than the machinability of grades 1.4112 and 1.4125 (AISI 440B / 440C). | |
| Heat Treatment | Solution annealing: For minimum hardness, grade 4116N should be treated at about 840°C a few hours followed by very slow cooling. The hardness thus obtained lies around 210 HV1kg. Solution Treatment and Quenching: Oil quench or air cooling should be carried out from a recommended solution temperature of 1050°C. Tempering: See below the curve that was obtained after a 10 minutes solution annealing treatment at 1050°C fol-lowed by air cooling. Tempering at 200°C achieves a good hardness / toughness balance. | |
| Hot forming | Forming: UGI® 4116N can be readily forged in the 950°C – 1200°C temperature range. Heating between 1180°C and 1200°C prior to forging is recommended, and forging temperatures should not decrease below 950°C. After forging, a slow cooling to room temperature is necessary, followed by annealing treatment, if a minimum hardness is required. | |
| Other | Available products: Other options: contact the supplier | |
| Welding | Welding of grade UGI 4116N is only possible with special precautions, and should be avoided whenever possible. | |
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