Nimonic93
British grade: Nimonic 93 nickel-basedsuperalloy
Chinese grade: GH93
French grade: NCK2OTA
I. Overview of Nimonic93 (GH93):
Nimonic93 is a precipitation-hardenednickel-based alloy containing higher cobalt and chromium, which has higherstrength and better structural stability and can work below 815 ° C with goodcomprehensive properties. It is extensively used in turbine blades for aircraftengines, turbine disks and fasteners for small engines. The alloy has good hotworking plasticity, and can be supplied in form of plate, bar and forging.
Chemical composition: see table 1-1:
Table 1-1 %
C≤ | Si≤ | Mn≤ | P≤ | S≤ | Cr≥ | Ni≥ | Mo≥ | Cu≤ |
0.13 | 1 | 1 | 0.015 | 0.015 | 18.0-21.0 | Balance | - | 0.2 |
Other | N≤ | Al≤ | Ti≤ | Fe≤ | Co≤ | B≤ | Pb≤ | Nb≤ |
- | 1.0-2.0 | 2.0-3.0 | 1 | 15.0-21.0 | 0.02 | 0.0025 | - |
Note: B isadded in a calculated amount, and the addition of trace amounts of Ce, Zr, Mgis allowed.
II. Physical and chemicalproperties:
1. Thermal performance:
(1) Melting temperature range: 1360 ～ 1390℃.
(2) Thermal conductivity: see Table 2-1.
Table 2-1
θ / ℃ | 20 | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 | 1000 |
λ/(W/(m·℃)) | 11.47 | 12.77 | 14.44 | 15.99 | 17.54 | 18.97 | 20.64 | 22.32 | 23.99 | 25.83 | 27.88 |
(3). Specific heat capacity: See Table 2-2.
Table 2-2
θ / ℃ | 20 | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 | 1000 |
c/(J/(kg.℃)) | 446 | 467 | 494 | 520 | 547 | 572 | 600 | 626 | 652 | 679 | 706 |
(4) Linear expansion coefficient: see Table2-3.
Table 2-3
θ / ℃ | 16～100 | 16～200 | 16～300 | 16～400 | 16～500 | 16～600 | 16～700 |
α / 10 -6℃-1 | 11.91 | 12.97 | 13.52 | 14.1 | 14.49 | 14.99 | 15.61 |
2. Density: ρ = 8.19g / cm3.
3. Electrical performance:
4. Magnetic properties: non-magnetic.
5. Chemical properties:
(1) Anti-oxidation performance: See Table 2-4for the oxidation rate after 100h test in air medium.
(2) Corrosion resistance: The alloy has goodheat and corrosion resistance.
Table 2-4
θ / ℃ | 700 | 800 | 900 |
Oxidation rate / (g / (m 2 · h)) | 0.0398 | 0.0236 | 0.1435 |
Note: The test method is according toYB48-1964.
III. Specifications and Ex-factorystatus
1. Classification: We can supply in form ofseamless pipes, steel plates, round steel, forgings, flanges, rings, weldedpipes, steel strips, wire and supporting welding materials.
2. Ex-factory status: Seamless Tube: solidsolution + acid white, length can be fixed; Plate: solid solution, pickling,trimming; Welded Tube: solid solution acid white + RT% flaw detection; Forging:annealing + turning; the bar is delivered in the state of forging, surfacepolishing or lapping; the strip is delivered after cold rolling, solid solutionsoftening, and descaling; the wire is solid-dissolved and pickled in a disc orstraight strip, solid solution straight polished.
