Are you looking for a stainless steel grade that offers stability and strength in high-temperature environments? If so, the 347LN stainless steel grade might be a good fit for your needs. In this blog post, we’ll explore the composition and physical properties of S34751 and its mechanical properties and uses.
347LN Stainless Steel Composition
The chemical composition of 347LN ss is made up of chromium (18-20%), nickel (9-13%), nitrogen (0.10-0.16%), molybdenum (1-2%), and silicon (1%). Its carbon content is 0.03%. This alloy is austenitic in structure and contains niobium for stabilization purposes; it’s commonly used in applications where the temperature is higher than 800°F.
| GRADES | UNS | C | MN | P | S | SI | CR | NI | MO | TI | NB | N |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TP347LN | S34751 | 0.08 | 2.0 | 0.045 | 0.030 | 1.0 | 17.0-19.0 | 9.0-13.0 |
347LN Stainless Steel Physical Properties
347LN ss has excellent weldability, corrosion resistance, formability, and toughness due to its low carbon content. It can easily be cold-worked or hot-worked; however, cold working should be done with caution to avoid cracking or tearing due to its low carbon content. When polished, it has a greyish-white colour, making it aesthetically pleasing for decorative applications like architectural components or fixtures. In addition, it has good wear resistance, which makes it suitable for use in medical parts or tools that are used frequently.
| Property | 347LN Data |
| Density, lb/in3 | 0.288 |
| Modulus of Elasticity, psi | 28.0 x 106 |
| Coefficient of Thermal Expansion, 68-212˚F, /˚F | 9.3 x 10-6 |
| Thermal Conductivity, Btu/ft hr ˚F | 9.2 |
| Specific Heat, Btu/lb ˚F | 0.12 |
| Electrical Resistivity, Microohm-in | 28.4 |
347LN Stainless Steel Mechanical Properties
This alloy has an ultimate tensile strength ranging from 50 ksi to 70 ksi depending on the heat treatment process used during fabrication. Its yield strength ranges from 30 ksi to 50 ksi depending on heat treatment as well. It has a melting point ranging between 2550°F and 2650°F, which makes it suitable for welding applications where temperatures are high enough to cause other alloys to melt down too quickly or become brittle due to their lower melting points. Lastly, its modulus of elasticity ranges between 28 x 10^6 psi and 30 x 10^6 psi, depending on the heat treatment process used during fabrication.
| Material | Heat Treatment |
Temperure Min. º F(º C) |
Tensile Strength Ksi (MPa), Min. |
Yield Strength Ksi (MPa), Min. |
Elongation %, Min |
| 347LN | Solution | 1900 (1040) | 75(515) | 30(205) | 35 |
347LN Stainless Steel Equivalent
| Grade | UNS No | Euronorm | |
| No | |||
| 347LN | S34751 | – | |
347LN Stainless Steel Uses
The low carbon content of this alloy makes it suitable for high-temperature applications such as turbine blades in gas turbines because it prevents warping when exposed to extreme temperatures for long periods of time. It can also be used in exhaust systems due to its excellent corrosion resistance properties, which make it resistant to rusting even after prolonged exposure to moisture or other corrosive elements like salt water or chemicals found in industrial environments like factories or refineries. Additionally, this alloy can be used in high-pressure vessels because its superior mechanical properties allow them to withstand extremely high levels of pressure without deforming under stress, unlike some other alloys, which may crack when exposed to such pressures over time. Lastly, this alloy can be used in medical instruments due to its good wear resistance properties, which make them last longer than some other alloys when exposed to frequent usage by medical professionals over long periods of time without breaking down prematurely from fatigue caused by constant use.
Conclusion
In conclusion, the 347LN stainless steel grade offers an excellent combination of physical and mechanical characteristics that make it suitable for a wide range of applications, including gas turbine blades, exhaust systems, high-pressure vessels, and medical instruments where stability and strength are required at extreme temperatures and/or under heavy loads over long periods of time without deforming or breaking down prematurely due fatigue caused by frequent usage over time. Its low carbon content also gives it superior corrosion resistance properties, which make this alloy ideal for use in areas with frequent exposure to moisture or other corrosive elements like salt water or chemicals found in industrial environments like factories and refineries. If you’re looking for a durable material that can stand up against extreme temperatures, pressures, and conditions, then consider using the 347LN stainless steel grade – you won’t regret investing in this quality material!
Pipingmart is a B2B portal that specializes in metal, industrial and piping items. Additionally, we share the latest information and information about materials, products and various types of grades to assist businesses that are involved in this business.
