Properties
General
| Property | Value |
|---|---|
Density | 7.9 g/cm³ Show Supplier Material materials with Density of 7.9 g/cm³ |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Creep strength 10^3 cycles | 600 °C | 190 MPa Show Supplier Material materials with Creep strength 10^3 cycles of 190 MPa | |
700 °C | 75 MPa Show Supplier Material materials with Creep strength 10^3 cycles of 75 MPa | ||
800 °C | 40 MPa Show Supplier Material materials with Creep strength 10^3 cycles of 40 MPa | ||
900 °C | 15 MPa Show Supplier Material materials with Creep strength 10^3 cycles of 15 MPa | ||
Creep strength 10^4 cycles | 600 °C | 120 MPa Show Supplier Material materials with Creep strength 10^4 cycles of 120 MPa | 10^4 cycles |
700 °C | 36 MPa Show Supplier Material materials with Creep strength 10^4 cycles of 36 MPa | 10^4 cycles | |
800 °C | 18 MPa Show Supplier Material materials with Creep strength 10^4 cycles of 18 MPa | 10^4 cycles | |
900 °C | 8.5 MPa Show Supplier Material materials with Creep strength 10^4 cycles of 8.5 MPa | 10^4 cycles | |
Creep strength 10^5 cycles | 600 °C | 65 MPa Show Supplier Material materials with Creep strength 10^5 cycles of 65 MPa | 10^5 cycles |
700 °C | 10 MPa Show Supplier Material materials with Creep strength 10^5 cycles of 10 MPa | 10^5 cycles | |
800 °C | 7.5 MPa Show Supplier Material materials with Creep strength 10^5 cycles of 7.5 MPa | 10^5 cycles | |
900 °C | 3 MPa Show Supplier Material materials with Creep strength 10^5 cycles of 3 MPa | 10^5 cycles | |
Elastic modulus | 20 °C | 196 GPa Show Supplier Material materials with Elastic modulus of 196 GPa | |
200 °C | 185 GPa Show Supplier Material materials with Elastic modulus of 185 GPa | ||
400 °C | 170 GPa Show Supplier Material materials with Elastic modulus of 170 GPa | ||
600 °C | 155 GPa Show Supplier Material materials with Elastic modulus of 155 GPa | ||
800 °C | 135 GPa Show Supplier Material materials with Elastic modulus of 135 GPa | ||
1000 °C | 120 GPa Show Supplier Material materials with Elastic modulus of 120 GPa | ||
Elongation | 30 % Show Supplier Material materials with Elongation of 30 % | min., for 20-800°C | |
Hardness, Brinell | 223.0 Show Supplier Material materials with Hardness, Brinell of 223.0 | max. | |
Hardness, Rockwell B | 95.0 Show Supplier Material materials with Hardness, Rockwell B of 95.0 | max. | |
Tensile strength | 20 °C | 550.0 - 750.0 MPa Show Supplier Material materials with Tensile strength of 550.0 - 750.0 MPa | |
100 °C | 470.0 - 670.0 MPa Show Supplier Material materials with Tensile strength of 470.0 - 670.0 MPa | ||
200 °C | 440.0 - 640.0 MPa Show Supplier Material materials with Tensile strength of 440.0 - 640.0 MPa | ||
400 °C | 400.0 - 600.0 MPa Show Supplier Material materials with Tensile strength of 400.0 - 600.0 MPa | ||
600 °C | 350.0 - 650.0 MPa Show Supplier Material materials with Tensile strength of 350.0 - 650.0 MPa | ||
800 °C | 200.0 - 400.0 MPa Show Supplier Material materials with Tensile strength of 200.0 - 400.0 MPa |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 0.0000165 1/K Show Supplier Material materials with Coefficient of thermal expansion of 0.0000165 1/K | 20 to 200°C | |
0.0000175 1/K Show Supplier Material materials with Coefficient of thermal expansion of 0.0000175 1/K | 20 to 400°C | ||
0.0000195 1/K Show Supplier Material materials with Coefficient of thermal expansion of 0.0000195 1/K | 20 to 100°C0 | ||
600 °C | 0.000018 1/K Show Supplier Material materials with Coefficient of thermal expansion of 0.000018 1/K | ||
800 °C | 0.0000185 1/K Show Supplier Material materials with Coefficient of thermal expansion of 0.0000185 1/K | ||
Specific heat capacity | 20 °C | 500 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 500 J/(kg·K) | |
200 °C | 550 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 550 J/(kg·K) | ||
400 °C | 590 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 590 J/(kg·K) | ||
600 °C | 620 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 620 J/(kg·K) | ||
800 °C | 650 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 650 J/(kg·K) | ||
1000 °C | 670 J/(kg·K) Show Supplier Material materials with Specific heat capacity of 670 J/(kg·K) | ||
Thermal conductivity | 20 °C | 15 W/(m·K) Show Supplier Material materials with Thermal conductivity of 15 W/(m·K) | |
200 °C | 17 W/(m·K) Show Supplier Material materials with Thermal conductivity of 17 W/(m·K) | ||
400 °C | 20 W/(m·K) Show Supplier Material materials with Thermal conductivity of 20 W/(m·K) | ||
600 °C | 23 W/(m·K) Show Supplier Material materials with Thermal conductivity of 23 W/(m·K) | ||
800 °C | 25 W/(m·K) Show Supplier Material materials with Thermal conductivity of 25 W/(m·K) | ||
1000 °C | 28 W/(m·K) Show Supplier Material materials with Thermal conductivity of 28 W/(m·K) |
Electrical
| Property | Temperature | Value |
|---|---|---|
Electrical resistivity | 20 °C | 0.00000085 Ω·m Show Supplier Material materials with Electrical resistivity of 0.00000085 Ω·m |
200 °C | 0.00000105 Ω·m Show Supplier Material materials with Electrical resistivity of 0.00000105 Ω·m | |
400 °C | 0.0000012 Ω·m Show Supplier Material materials with Electrical resistivity of 0.0000012 Ω·m | |
600 °C | 0.0000013 Ω·m Show Supplier Material materials with Electrical resistivity of 0.0000013 Ω·m | |
800 °C | 0.0000014 Ω·m Show Supplier Material materials with Electrical resistivity of 0.0000014 Ω·m | |
1000 °C | 0.00000145 Ω·m Show Supplier Material materials with Electrical resistivity of 0.00000145 Ω·m |
Chemical properties
| Property | Value | Comment |
|---|---|---|
Carbon | 0.15 Show Supplier Material materials with Carbon of 0.15 | max. |
Chromium | 19.0 - 20.0 % Show Supplier Material materials with Chromium of 19.0 - 20.0 % | |
Manganese | 2.0 Show Supplier Material materials with Manganese of 2.0 | max. |
Nickel | 11.0 - 12.5 % Show Supplier Material materials with Nickel of 11.0 - 12.5 % | |
Nitrogen | 0.1 Show Supplier Material materials with Nitrogen of 0.1 | max. |
Phosphorus | 0.04 Show Supplier Material materials with Phosphorus of 0.04 | max. |
Silicon | 1.5 - 2.5 % Show Supplier Material materials with Silicon of 1.5 - 2.5 % | |
Sulfur | 0.015 Show Supplier Material materials with Sulfur of 0.015 | max. |
Technological properties
| Property | ||
|---|---|---|
| Application areas | ||
| Cold Forming | Bending – Forming Like other austenitic steels and heat-resistant steels, UGI® 4828 can be cold worked easily. Because UGI® 4828 is ductile, it is well suited to bending and forming. However, long-term high-temperature service may reduce the ductility of the steel. Initial ductility can be restored with a solution annealing heat treatment. | |
| Corrosion properties | UGI® 4828 has good corrosion resistance. The austenitic microstructure combined with the high silicon (≥1.5%) and chromium additions (≥ 19%) give this alloy a better high-temperature corrosion resistance than the AISI 321 or AISI 347 grades. This grade is not designed for wet corrosion resistance purposes even though, in its annealed condition, UGI® 4828 provides better corrosion resistance in a marine atmosphere than UGI® 4307 (AISI 304L). High-temperature oxidation resistance UGI® 4828 has a high destructive scaling temperature and thus exhibits good scaling resistance in both continuous and intermittent service up to 1000°C (see the chart on the right side of the material page). Typical working temperatures of UGI® 4828 in sulphur-containing gases are as follows: | |
| General machinability | In the graphs on the right side og the material page is a comparison of UGI® 4828 with UGI® 4541, UGI® 4841 and UGI® 4845 in turning with a SECO TM2000 CNMG 120408-MF4 tool, in terms of: In terms of productivity, UGI® 4828 is inferior to UGI® 4541 (mainly because of the high sulphur content of UGI® 4541) and similar to UGI® 4841 and UGI® 4845 (despite its much lower Ni content compared to these two grades). In terms of chip breakability, owing to its moderate carbon content and high silicon content, UGI® 4828 is similar to UGI® 4541, despite its lower sulphur content. It is superior to UGI®4841 and far superior to UGI® 4845, which have very low sulphur contents. | |
| Heat Treatment | Solution annealing Optimal material properties are produced after solution annealing at between 1050°C and 1150°C. This should be followed by a rapid cooling in air or water. | |
| Hot forming | Forging UGI® 4828 can be easily forged at between 800°C and 1150°C. Components should be cooled quickly, this can be done either in air or in water. Post-forging annealing heat treatment is not generally required since the material is designed for high-temperature applications. | |
| Other | Available products: Other products: contact the supplier | |
| Surface Treatment | Pickling Mechanical methods are preferred to pickling to remove oxides, slag and incrustations. Strong pickling pastes should be avoided since the welded alloy is susceptible to intergranular corrosion. | |
| Welding | UGI® 4828 has good/very good weldability. It is weldable using all the usual arc welding processes such as GMAW, GTAW, SAW and SMAW. Laser beam welding must be used with care because of its tendency to promote hot cracking in this kind of austenitic grade. No preheating is required and no post-weld heat treatment is required. Nickel-based filler materials containing Niobium are not recommended since intermetallic intergranular precipitations may occur at the fusion line. The interpass temperature should be limited to 150°C. Precautions: | |