CuNi30Mn1Fe vs CuNi10Fe1Mn: Same Cu-Ni family — 70/30 has better corrosion resistance, 90/10 is cheaper
CuNi30Mn1Fe vs CuNi10Fe1Mn
Side-by-side chemical composition and mechanical property comparison.
Overview
CuNi30Mn1Fe
CW354H
70/30 copper-nickel alloy — the premium marine cupronickel. Higher Ni than 90/10 (CuNi10Fe1Mn) for superior seawater corrosion resistance, especially in polluted or high-velocity water (up to 4.5 m/s). Used for condenser tubes, desalination plant tubing, propeller sleeves, seawater piping, and heat exchangers in naval and offshore service.
CuNi10Fe1Mn
CW352H
90/10 copper-nickel alloy — the standard marine piping and condenser material. Outstanding resistance to seawater corrosion and biofouling. Used for seawater piping, heat exchangers, condensers, offshore platforms, and desalination plants. Old DIN number 2.0872.
| CuNi30Mn1Fe | CuNi10Fe1Mn | |
|---|---|---|
| Material Number | CW354H | CW352H |
| Category | Copper & Brass | Copper & Brass |
| Standard | EN 12163 | EN 12163 |
Chemical composition (wt%)
| Element | CuNi30Mn1Fe | CuNi10Fe1Mn | Overlap |
|---|---|---|---|
| C | 0–0.05% | — | — |
| Mn | 0.5–1.5% | 0.5–1% | OK |
| S | 0–0.02% | — | — |
| Ni | 29–33% | 9–11% | No overlap |
Mechanical properties
| Property | CuNi30Mn1Fe | CuNi10Fe1Mn | Unit |
|---|---|---|---|
| tensile_strength | ≥ 370 | ≥ 290 | MPa |
| yield_strength | ≥ 125 | ≥ 100 | MPa |
| elongation | ≥ 36 | ≥ 30 | % |
Compatibility Assessment
70/30 has superior seawater resistance especially in polluted/high-velocity conditions. 90/10 is ~40% cheaper and adequate for most marine service. Choose 70/30 for condensers and critical seawater exposure; 90/10 for general marine piping.
Frequently Asked Questions
Is CuNi30Mn1Fe the same as CuNi10Fe1Mn?
CuNi30Mn1Fe and CuNi10Fe1Mn have a 70% composition overlap. Same Cu-Ni family — 70/30 has better corrosion resistance, 90/10 is cheaper
Can I replace CuNi30Mn1Fe with CuNi10Fe1Mn?
In many cases, yes. The compositions overlap significantly (70%). However, always verify mechanical property requirements and heat treatment compatibility for your specific application.
What is the difference between CuNi30Mn1Fe and CuNi10Fe1Mn?
The main differences are in the following elements: Ni, Fe. CuNi30Mn1Fe is a Copper & Brass grade, while CuNi10Fe1Mn is a Copper & Brass grade.
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Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.