Material datasheet · Nickel-copper alloy
Ni-Cu Alloy
UNS N04400 · Annealed; cold-drawn (H) for higher strength
Nickel-copper alloy bridging stainless and Hastelloy. Marine, HF acid, reducing media.
Chemical composition
Nominal % by weight.
| Element | % by wt |
|---|---|
| Ni | ≥63 |
| Cu | 28–34 |
| Fe | ≤2.5 |
| Mn | ≤2.0 |
Applicable specifications
AMS / ASTM / MIL.
- AMS 4675 (bar)
- ASTM B164
- QQ-N-281
Machining guidance
CNC parameters and tooling.
Coated carbide; rigid setup
Workhardens. Sharp, free-cutting geometry; no dwell.
Stock & cost
Forms and Q1 2026 pricing.
- Passivate
- Pickled descale
Typical applications
Where Monel 400 is the right pick.
- Marine pump shafts
- Naval propellers
- HF acid handling
- Heat exchangers
- Submarine hardware
Alternative materials
Substitute or upgrade options.
- K-500 (age-hardenable)
- 70/30 cupronickel C715 (cheaper marine)
- Hastelloy C-276 (broader corrosion)
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Machine your part in Monel 400.
Production CNC milling and turning. Confirm material, inspection and documentation requirements when requesting a quote.
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Related tools & references
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Estimate part weight from Monel 400 stock.
How it stacks up against its alternatives.
Aerospace specs that call out this alloy.