Monel 400
Monel 400 is a nickel-copper alloy known for good resistance to seawater, hydrofluoric acid and many neutral or reducing environments. It retains useful mechanical properties across a broad temperature range.
Monel 400 Information
Monel 400 is a nickel-copper alloy known for good resistance to seawater, hydrofluoric acid and many neutral or reducing environments. It retains useful mechanical properties across a broad temperature range.
Metallic winding and compatible ring components where service conditions are suitable.
| Material specification | ASTM B127 |
|---|---|
| Specified grade / UNS | Monel 400 N04400 |
Monel 400 Chemical Composition
ASTM B127 · Grade-specific requirements
| Element / requirement | Value |
|---|---|
| Ni % | ≥63.0 |
| Cu % | 28.0–34.0 |
| Fe % | ≤2.5 |
| Mn % | ≤2.0 |
| C % | ≤0.30 |
| Si % | ≤0.50 |
| S % | ≤0.024 |
Monel 400 Mechanical Properties
ASTM B127 · Grade-specific requirements
| Product form / condition | Tensile min / range (MPa) | Yield min (MPa) | Elongation min (%) | Hardness |
|---|---|---|---|---|
| Hot-rolled plate / sheet · Annealed | 485 | 195 | 35 | — |
| Hot-rolled plate · As-rolled | 515 | 275 | 25 | — |
| Cold-rolled sheet / strip · Annealed | 485–585 | 195 | 35 | — |
| Cold-rolled strip · Skin hard | — | — | — | 68–73 HRB |
| Cold-rolled sheet / strip · Quarter-hard | — | — | — | 73–83 HRB |
| Cold-rolled sheet / strip · Half-hard | — | — | — | 82–90 HRB |
| Cold-rolled strip · Three-quarter-hard | — | — | — | 89–94 HRB |
| Cold-rolled sheet / strip · Hard | 690 | 620 | 2 | — |
| Cold-rolled strip · Spring temper | — | — | — | ≥98 HRB |
ASTM B127 Grade Reference
Monel 400 N04400
The chemical and mechanical tables on this page use the ASTM B127 requirements for this grade, including the product conditions listed in the standard overview.
Specify Monel 400 for your gasket
Share your gasket dimensions, service conditions and quantity for Monel 400 material options and pricing.