Jun 26 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Fabrication and Heat Treatment
Machining
Welding
Cold Working
Hot Working
Other Designations
Applications
Introduction
Nickel alloy 400 is a ductile nickel-copper alloy that exhibits excellent corrosion resistance under various conditions. The alloy is frequently used in mildly oxidizing environments to moderately reducing conditions. It has high strength and toughness, and is resistant to chloride stress corrosion cracking.
The following section will discuss in detail about nickel alloy 400.
Chemical Composition
The chemical composition nickel alloy 400 is outlined in the following table.
|
Element |
Content (%) |
|
Nickel, Ni |
63-70 |
|
Copper, Cu |
28-34 |
|
Iron, Fe |
2.5 |
|
Manganese, Mn |
2 |
|
Silicon, Si |
0.5 |
|
Carbon, C |
0.3 |
|
Sulfur, S |
0.024 |
Physical Properties
The following table shows the physical properties of nickel alloy 400.
|
Properties |
Metric |
Imperial |
|
Density |
8.80 g/cm3 |
0.318 lb/in3 |
|
Melting point |
1300-1350°C |
2370-2460°F |
Mechanical Properties
The mechanical properties of nickel alloy 400 (hot-rolled) are displayed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength (annealed) |
517-655 MPa |
75-95 ksi |
|
Yield strength (annealed) |
276-517 MPa |
40-75 ksi |
|
Elongation at break (annealed) |
30-45% |
30-45% |
|
Brinell hardness |
125-215 |
125-215 |
|
Rockwell B hardness |
70-96 |
70-96 |
Thermal Properties
The thermal properties of nickel alloy 400 are given in the following table
|
Properties |
Metric |
Imperial |
|
Thermal conductivity |
22 W/mK |
150 BTU.in/hrft².°F |
Fabrication and Heat Treatment
Machining
Nickel alloy 400 can be machined at standard rates using conventional machine tools.
Welding
The alloy can be welded using conventional welding techniques such as plasma arc welding, gas metal arc welding, gas tungsten arc welding and shielded metal arc welding.
Cold Working
The alloy can be cold-worked by all cold fabrication methods.
Hot Working
Hot forming of nickel alloy 400 can be performed at temperatures 649 - 1177°C (1200-2150°F).
Other Designations
Other designations that are equivalent to nickel alloy 400 include the following:
-
ASTM B127
-
ASME SB127
-
AMS 4544
-
QQ-N-281
Applications
The following are the list of applications of nickel alloy 400:
-
Steam generators
-
Crude petroleum stills
-
Marine components
-
Chemical processing equipment
-
Water treatment plant.