Jul 25 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Fabrication and Heat Treatment
Machinability
Forming
Welding
Forging
Hot Working
Cold working
Annealing
Other Designations
Applications
Introduction
Nicrofer 6023 alloy is a nickel-chromium-iron alloy with excellent resistance to corrosion and oxidation at elevated temperatures. The alloy is precipitation-hardenable, and exhibits good mechanical properties at high temperatures.
The following datasheet will provide an overview of nicrofer 6023 alloy.
Chemical Composition
The chemical composition of nicrofer 6023 alloy is outlined in the following table.
|
Element |
Content (%) |
|
Nickel, Ni |
58-63 |
|
Chromium, Cr |
21-25 |
|
Aluminum, Al |
1-1.7 |
|
Copper, Cu |
1 |
|
Manganese, Mn |
1 |
|
Silicon, Si |
0.5 |
|
Carbon, C |
0.1 |
|
Sulfur, S |
0.015 |
|
Iron, Fe |
Balance |
Physical Properties
The following table shows the physical properties of nicrofer 6023 alloy.
|
Properties |
Metric |
Imperial |
|
Density |
8.11 g/cm3 |
0.293 lb/in3 |
|
Melting point |
1360-1411°C |
2480-2572°F |
Mechanical Properties
The mechanical properties of nicrofer 6023 alloy are displayed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength (Solution annealed) |
760 MPa |
110000 psi |
|
Yield strength (Solution annealed) |
450 MPa |
65300 psi |
|
Elongation at break (Solution annealed) |
42% |
42% |
Thermal Properties
The thermal properties of nicrofer 6023 alloy are given in the following table.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@20-100°C/68-212°F) |
13.75 µm/m°C |
7.639 µin/in°F |
|
Thermal conductivity |
11.2 W/mK |
77.7 BTU.in/hrft².°F |
Fabrication and Heat Treatment
Machinability
Conventional machining techniques that are used for machining iron-based alloys can be used.
Forming
Nicrofer 6023 alloy has excellent ductility, and can be readily formed by all conventional techniques.
Welding
The alloy can be welded using commonly used welding techniques such as gas-tungsten arc welding, shielded metal-arc welding, gas metal-arc welding and submerged-arc welding.
Forging
The alloy can be forged in the temperature range of 1038 to 1232°C (1900 to 2250°F).
Hot Working
Hot working of nicrofer 6023 alloy can be performed in the temperature range of 871 to 1232°C (1600 to 2250°F).
Cold working
Cold working may be performed using standard tooling.
Annealing
The alloy can be annealed at 1149°C (2100°F) and then rapidly cooled to avoid thermal cracking.
Other Designations
Other designations that are equivalent to nicrofer 6023 alloy include the following:
-
AMS 5715
-
AMS 5870
-
ASTM B166
-
ASTM B167
-
ASTM B168
-
DIN 2.4851
Applications
The following are the list of applications of nicrofer 6023 alloy:
-
Annealing tubes
-
Muffles
-
Flame shields
-
Combustor components
-
Process heaters
-
Condenser tubes