Haynes 282 alloy is a nickel-chromium-cobalt superalloy with excellent oxidation and high-temperature corrosion resistance. It is commonly used in applications that require high temperatures, such as aircraft engines, nuclear reactors, and industrial furnaces. Below, we will discuss this alloy’s composition, mechanical properties, physical properties, uses, and corrosion resistance.
Haynes 282 Composition
Grade 282 is an iron-based superalloy composed primarily of nickel (18-21%), chromium (17-19%), cobalt (10-13%), tungsten (5-7%) and molybdenum (2.5%). This alloy also contains smaller amounts of manganese, silicon, sulfur and phosphorus. The combination of these elements gives it superior strength and heat resistance at very high temperatures.
Element | Min % | Max % |
---|---|---|
Al | 1.38 | 1.65 |
B | 0.003 | 0.01 |
C | 0.04 | 0.08 |
Nb | – | 0.20 |
Co | 9.00 | 11.00 |
Cr | 18.50 | 20.50 |
Cu | – | 0.10 |
Fe | – | 1.50 |
Mn | – | 0.30 |
Mo | 8.00 | 9.00 |
Ni | bal | |
P | – | 0.015 |
S | – | 0.015 |
Si | – | 0.15 |
Ta | – | 0.10 |
Ti | 1.90 | 2.30 |
W | – | 0.50 |
Haynes 282 Mechanical Properties
The mechanical properties of alloy 282 are dependent on its composition. The tensile strength of this alloy can range from 1020MPa to 1670MPa depending on the specific grade of the material. It has good creep rupture strength at elevated temperatures up to about 1250°C (2282°F). It also has good formability when annealed after forging or machining operations.
Annealed | ||
---|---|---|
Approx. tensile strength | 800 – 1200 N/mm² | 116 – 174 ksi |
Approx. operating temperature depending on load** and environment | Contact Alloy Wire for information | Contact Alloy Wire for information |
Spring Temper | ||
---|---|---|
Approx. tensile strength | 1300 – 1600 N/mm² | 190 – 232 ksi |
Approx. operating temperature depending on load** and environment | Contact Alloy Wire for information | Contact Alloy Wire for information |
Spring Temper + Stabilised and Aged | ||
---|---|---|
Approx. tensile strength | 1000 – 1300 N/mm² | 145 – 190 ksi |
Approx. operating temperature depending on load** and environment | Contact Alloy Wire for information | Contact Alloy Wire for information |
Haynes 282 Physical Properties
The melting point for HAYNES® 242® alloy ranges from 1410°C -1460°C (2570°F -2660°F). Its density is 8.3 g/cm3 at room temperature, and its electrical resistivity is 1.1E 5 Ωcm at 20°C (68°F).
Density | Melting Point | Coefficient of Expansion |
---|---|---|
8.27 g/cm³ | 1300 – 1375 °C | 12.1 μm/m °C (20 – 100 °C) |
0.3 lb/in³ | 2370 – 2510 °F | 6.7 x 10-6 in/in °F (70 – 212 °F) |
Haynes 282 Uses
Haynes 282 alloy has a variety of services due to its unique combination of mechanical and physical properties. It is commonly used in applications requiring high-temperature performance, such as turbine blades in aircraft engines and components in nuclear reactors. It can also be used for parts in industrial furnaces that need to withstand extreme heat and in corrosive environments like chemical processing plants or oil refineries.
Haynes 282 Corrosion Resistance
Haynes 282 alloy has excellent corrosion resistance due to its cobalt content, forming a protective oxide layer on the surface when exposed to oxygen or other corrosive agents. This layer helps protect against oxidation up to 1150 °C (2102 °F), making it ideal for use in harsh environments where conventional materials may not be able to withstand the heat or corrosive atmosphere present.
Conclusion
Haynes 282 Alloy is a versatile superalloy that provides exceptional oxidation and high-temperature corrosion resistance combined with excellent mechanical properties even at elevated temperatures up to 1150 °C (2102 °F). Its wide range of uses includes aircraft engines, nuclear reactors, industrial furnaces, chemical processing plants, oil refineries and more due to its exceptional ability to withstand extreme heat and corrosive environments. Its unique combination of properties makes it easy to see why this material remains one of the most popular alloys today!
A passionate metal industry expert and blogger. With over 5 years of experience in the field, Palak brings a wealth of knowledge and insight to her writing. Whether discussing the latest trends in the metal industry or sharing tips, she is dedicated to helping others succeed in the metal industry.