|
Alloy |
UNS Number |
|
Alloy X |
UNS N06002 |
GENERAL PROPERTIES
Alloy X is a wrought nickel base alloy with excellent high temperature strength and oxidation resistance. All of the product forms are excellent in terms of forming and welding. Although Alloy X is primarily noted for heat and oxidation resistance it also has good resistance to chloride stress-corrosion cracking and has good resistance to carburization, excellent resistance to reducing or carburizing atmospheres. Alloy X is one of the most widely used nickel base superalloys for gas turbine engine components.
RESISTANCE TO CORROSION
The outstanding oxidation resistance of Alloy X is illustrated below. Tests were conducted by exposing samples to dry air at 1093°C. and to dry air pressurized to 300 psi at 954°C. Two criteria for evaluating oxidation resistance are weight change and depth of corrosion penetration. Alloy X excels in both respects due to the formation of a protective, tenacious oxide film.
PHYSICAL PROPERTIES
|
Melting Point (°C) |
Density |
Specific Gravity |
Modulus of Elasticity |
|
1260 – 1355 |
8.22g/cm3 |
8.22 |
205 GPa |
MECHANICAL PROPERTIES
|
Alloy |
Tensile Strength |
Yield Strength |
% Elongation |
|
X |
95,000 |
35,000 |
35 |
CHEMICAL PROPERTIES
|
Alloy |
C |
Mn |
Cr |
Fe |
Si |
Mo |
Co |
B |
Al |
P |
S |
Ti |
W |
Cu |
Ni |
|
X |
0.05-0.15 |
1.00 |
20.5-23.0 |
17.0-20.0 |
0.03 |
8.0-10.0 |
0.5-2.5 |
0.01 |
0.5 |
0.04 |
0.03 |
0.15 |
0.20-1.0 |
0.5 |
Bal |
WELDING
Alloy X is readily welded by Gas Tungsten Arc Welding (GTAW), Gas Metal Arc
Welding (GMAW), Shielded Metal Arc Welding (SMAW), and resistance welding techniques.
Submerged Arc Welding (SAW) is not recommended as this process is characterized by high heat
Input to the base metal and slow cooling of the weld. These factors can increase weld restraint and promote cracking.
HEAT TREATMENT
All wrought forms of Alloy X are furnished in the solution heat-treated condition unless otherwise specified. The standard heat-treatment is at a temperature of 1177°C (2150°F) followed by rapid cooling. Other heat-treatment temperatures also may be effective for certain forms and conditions.
The properties listed here are average values based on laboratory test conducted by the manufacturer. They are indicative only of the results obtained in such tests and should not be considered as guaranteed maximums or minimums. Materials must be tested under actual service conditions to determine their suitability for a particular purpose. All data represent the average of six or less tests unless otherwise noted. All data shown for material aged for 1,000, 4,000, 8,000, and/or 16,000 hours are based on tests of a single heat. The secondary units (metric) used in this booklet are those of the SI system.
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