NAS HX； Nickel Base Heat/Oxidation Resistant Alloy
Characteristics of NAS HX
A solution strengthening nickel-base alloy, NAS HX (UNS N06002), comparable to Alloy X alloy, is powerful, providing strength and oxidation resistance in temperatures reaching as high as 1200℃. With superior workability and weldability as well, it is excellent for use in gas turbine parts as well as various heating furnace parts.
Chemical Composition
(%)
| - | C | Si | Mn | P | S | Ni | Cr | Mo | Co | W | Fe |
| ASTM B435 UNS N06002 |
0.05～ 0.15 |
≦1.00 | ≦1.00 | ≦0.04 | ≦0.03 | Bal. | 20.5～ 23.0 |
8.0～ 10.0 |
0.5～ 2.5 |
0.2～ 1.0 |
17.0～ 20.0 |
| SAE AMS 5536 |
0.05～ 0.15 |
≦1.00 | ≦1.00 | ≦0.040 | ≦0.030 | Bal. | 20.50～ 23.00 |
8.00～ 10.00 |
0.50～ 2.50 |
0.20～ 1.00 |
17.00～ 20.00 |
| NAS HX | 0.06 | 0.27 | 0.50 | 0.01 | 0.001 | Bal. | 21.4 | 8.8 | 1.5 | 0.7 | 18.2 |
Corresponding Standard
Corresponding standards are as follows;
ASTM B435 / UNS N06002
ASME SB-435 / UNS N06002
SAE AMS 5536
JIS H4551 / NW6002
Mechanical Properties
| Grade | 0.2% Proof stress (MPa) |
Tensile strength (MPa) |
Elongation （％） |
Grain size |
| ASTM B435 / UNS N06002 | ≧240 | ≧655 | ≧35 | ≧3 |
| SAE AMS 5536 | ≧310 | ≧724 | ≧35 | ≧4 |
| NAS HX (1.5mmt) | 344 | 752 | 53 | 6 |
Creep Rupture Strength
Creep rupture strength of NAS HX
| Grade | Temperature | Load | Time to rupture | Elongation to rupture |
| SAE AMS 5536 | 1500ﾟF (816 ℃) |
16.0 ksi (110 MPa) |
≧24 hr | ≧8 % |
| NAS HX ( 1.5mmt) | 1500ﾟF (816 ℃) |
16.0 ksi (110 MPa) |
44 hr | 142 % |
Bendability
SAE AMS 5536 requires no cracking occurs in 180° bend test with radius 1.5t (t being the nominal thickness). A 180° bend test and close contact bend test were performed on a sheet of solution-treated NAS HX 1.5-mm thick, and no cracking occurred as shown in Figure 1.
