Incoloy alloy 028
- Superalloy with high strength
- Functions easily at high temperature
- Resistant to reducing acids or oxidation
- Copper makes it sulfuric acid resistant
Description
Overview:
With Incoloy 028, you get access to an extensively alloyed stainless steel of the austenitic kind that offers resistance to corrosive media environments. Given its chromium & molybdenum content, this alloy offers high resistance to oxidizing & reducing acids or salts.
Apart from this, the inclusion of copper enhances its overall resistance to H2SO4 acid. In terms of usage, this alloy is used on a wide scale in industries such as petrochemical or chemical processing. The alloy tubes can be cold worked for enhanced strength when kept in a moderately corrosive sour gas well.
Common Names:
- UNS N08028
- Nr.1.4563
Executive Standards:
- ASTM B829
- ASTM B709
- ASTM B 668
- ASME SB-668
- ASME SB-709
- ASME SB-829
Chemical Properties:
| Iron (%) | 20-40.4 |
| Chromium (%) | 26-28 |
| Nickel (%) | 30-34 |
| Manganese (%) | Max 2.5 |
| Molybdenum (%) | 3-4 |
| Others (%) | Remainder |
Mechanical Properties:
| Yield Strength | Metric | 214 MPa |
| Imp | 31 Ksi | |
| Tensile Strength | Metric | 500 Mpa |
| Imp | 72.5 Ksi | |
| Break Elongation (Cold Worked) | Metric | 15 % |
| Imp | 50 % | |
| Elasticity Modulus | Metric | 200 GPa |
| Imp | 29000 Ksi | |
| Hardness
(Rockwell B) |
Metric | 80-90 |
| Imp | 80-90 | |
| Hardness
(Rockwell C) |
Metric | 33 |
| Imp | 33 |
Physical Properties:
| Density | Lb/In3 | 0.29 |
| g/cm3 | 8.0 | |
| Specific Heat | Btu lb oF | 0.105 |
| J/kg oC | 450 | |
| Expansion Coefficient | 21 to 427 oC | 15.0-16.8 |
| 103 Ksi | 29.0 | |
| Young’s Modulus | GPa | 200 |
| Btu in/ft2 hoF | 66 | |
| Thermal Conductivity | W/m oC | 11.4 |
| Ohm circ mil/ft | 594 | |
| Electrical Resistivity | Micro ohm m | 0.99 |
Key Features:
- Surface Pitting Resistance: Given its strong build, the alloy is resistant to surface pitting or cracking with minimal physical deterioration.
- Handles High Temperature: Incoloy alloy 028 is perfect to be worked with elevated temperature.
- Fabrication Ease: Incoloy also flaunts easy fabrication properties to be molded into a designed size or shape in the tube form.
- Resistant to Creep Rupture: Incoloy alloy 028 is a great metal mix that flaunts perfect rupture strength in high temperatures or acid-corrosion settings.
Product Forms Available:
- Tube
Applications:
- Chemical processing
- Petrochemical Processing
- Downhole service (Deep Wells with Sour Gas)
- Ship Building
- Construction
Possible Alternative Grades:
- Incoloy A-286: This nickel-based alloy comes with the inclusion of titanium, aluminum, molybdenum, vanadium, or traces of the boron metal.
- Incoloy 926: Incoloy 926 comes with titanium & aluminum alongside the main nickel component. It also houses an adequate amount of chromium as well.
- Incoloy 925: This Mo-Cu-Ni based alloy is perfect for cold working as well as hot working requirements.
- Incoloy 901: This austenitic alloy is known for its properties for age hardening. Apart from titanium & aluminum, it also houses traces of lower carbon as well as boron.
Frequently Asked Questions:
- What differentiates Inconel from Incoloy?
The prime difference between the two is the composition. Inconel is primarily comprised of nickel and chromium, with nickel going over 50%. On the other hand, Incoloy is a nickel-chromium-iron alloy where nickel is below 50%.
- Is Incoloy open to cold working?
Yes, cold working can be done with Incoloy, but only after the annealing process is complete.
- What are some of the critical places for Incoloy use?
Incoloy is used in areas such as turbine blades, nuclear industry, as well as rocket engines.
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