Alloy 400
UNS N04400
Description
Alloy 400 is a ductile nickel-copper alloy with superb corrosion resistance under various conditions including seawater, marine atmospheres, organic acids (such as hydrofluoric acid, sulphuric acid, etc.) and neutral and alkaline salts. And with high nickel content, this alloy is immune to chloride-induced stress corrosion cracking. It also has high strength and toughness over a wide range of temperatures, in which the strength is comparable to that of structural steel. However, as with commercially pure nickel, Alloy 400 is low in strength in the annealed condition. Thus, it is consequently offered in a variety of tempers which increase the strength of the material. In addition, Alloy 400 is only hardenable through cold working, rather than heat treatment.
Chemical Component
| Ni + Co | Fe | Al | Mn | C | Si | Cu | P | S |
|---|---|---|---|---|---|---|---|---|
| 63.00% min | 2.50% max | 0.02% | 2.00% max | 0.30% max | 0.50% max | 28.0-34.0% | 0.005% max | 0.024% max |
Basic Information
| Items | Alloy 400 |
|---|---|
| Catalog | ACMA-Ni-A028 |
| Density | 0.318 lb/in3 (8.80 g/cm3) |
| Melting Point | 2370-2460 °F (1300-1350 °C) |
| Specific Heat | 0.10 Btu/lb-°F (430 J/kg-°K) |
| Magnetic Permeability | 75 °F, 200 oersted 1.0002 |
| Specific Gravity | 8.83 |
Material Forms
Alfa Chemistry offers Alloy 400 in a variety of forms, including
- Sheet & Plate
- Strip
- Pipe
- Tubing
- Rod
- Bar
- Wire
- Forgings
Mechanical Properties
- Typical room temperature tensile properties
| Conditions | Yield Strength 0.2% offset, psi | Tensile Strength, psi | Elongation (in 2“), % | Elastic Modulus (E), psi |
|---|---|---|---|---|
| Annealed | 35000 | 75000 | 45 | 26 x 106 |
| Hot rolled as rolled | 45000 | 80000 | 30 | 26 x 106 |
- Short time elevated temperature properties
The following table illustrates the short time tensile properties of Alloy 400 at temperatures above room temperature. Low temperature properties are added for comparison.
| Temperature | Yield Strength 0.2% offset | Tensile Strength | Elongation | |||
|---|---|---|---|---|---|---|
| °F | °C | psi | MPa | psi | MPa | % in 2" |
| 70 | 21 | 31000 | 215 | 82000 | 565 | 48 |
| 200 | 93 | 30000 | 105 | 80000 | 550 | 47 |
| 400 | 204 | 26000 | 180 | 75000 | 520 | 45 |
| 600 | 316 | 25000 | 175 | 73000 | 505 | 46 |
| 800 | 427 | 23000 | 160 | 70000 | 480 | 48 |
| 1000 | 538 | 21000 | 145 | 53000 | 370 | 40 |
Specifications
Plate Sheet And Strip: ASTM B127, ASME SB127, AMS 4544, QQ-N-281
Pipe and Tubing: ASTM B163/B165, ASME SB163/SB165, AMS 4574, MIL-T-1368/MIL-T-23520
Rod, Bar and Forgings: ASTM B164/B564, ASME SB164/SB564, AMS 4675, MIL-T-24106/QQ-N-281
Wire: AMS 4730/4731, QQ-N-281
Applications
Alloy 400 can be used in a variety of applications, including:
- Vales and pumps
- Pump and propeller shafts
- Marine fixtures and fasteners
- Chemical processing equipment
- Gasoline and fresh water tanks
- Crude petroleum stills;
- Process vessels and piping
- Boiler feedwater heaters
- Heat exchangers
* Technical data included herein should be used as a guideline only, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice.
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