Incoloy 28
Description:
Alloy 28 (UNS N08028, W. Nr. 1.4563) is a nickel-iron-chromium alloy with additions of molybdenum and copper. It has excellent resistance to both reducing and oxidizing acids, to stress-corrosion cracking, and to localise attack such as pitting and crevice corrosion. The alloy are especially resistant to sulphuric and phosphoric acid. Used for chemical processing, pollution control equipment, oil and gas well piping, nuclear fuel reprocessing, acid production and pickling equipment.
Alloy 28 Chemical Composition:
|
Element |
Content (%) |
|
Iron, Fe |
29-40.4 |
|
Nickel, Ni |
30-34 |
|
Chromium, Cr |
26-28 |
|
Molybdenum, Mo |
3-4 |
|
Manganese, Mn |
≤2.5 |
|
Others |
Remainder |
Alloy 28 Applications:
l Chemical and petrochemical processing industry
l Downhole service in deep sour gas wells.
Alloy 28 Other Designations:
Some of the designations used to denote INCOLOY alloy 028 are listed below:
l UNS N08028
l ASTM B 668
l ASTM B709
l ASTM B829
Alloy 28 Mechanical Properties:
|
Properties |
Metric |
Imperial |
|
Tensile strength(annealed) |
500 MPa |
72.5 ksi |
|
Yield strength(annealed) |
214 MPa |
31 ksi |
|
Elongation at Break(Cold worked) |
15% |
50% |
|
Modulus of Elasticity |
200 GPa |
29000 ksi |
|
Hardness, Rockwell B |
80-90 |
80-90 |
|
Hardness, Rockwell C |
33 |
33 |