Copper-NickelBeryllium-freeIn production
ARCAP AP4
Cu55Ni44Mn1
ARCAP AP4 is a Cu55Ni44Mn1 alloy designed and produced by Lebronze alloys. We supply it as rod, wire and strip for small precision parts in watchmaking, instruments and fibre optic connectors.
300–630 MPaYield strength
450–650 MPaTensile strength
1–30 %Elongation
4–4 %IACSEl. conductivity
Specify this grade
Qualification packs are released after a short form. Export control applies.
Properties
Guaranteed values, by temper.
- Alloy family
- Copper-Nickel
- Chemistry family
- CuNiMn
- Lead-free
- Yes
Forms
Forms & dimensions available
Rods2 variant(s)
Strips4 variant(s)
Wires2 variant(s)
Dimensional ranges and tolerances on request — machining and finishing are in house.
Standards
Standards & equivalences
- DIN 17471 n°2.0842
Product and process qualifications are listed above. Customer approvals are confidential and are not disclosed.
Applications
Markets & applications
Applications
- Watch microcomponents
- Shielding for aerospace instruments
- Optical fibre connectors

Why this grade
High elasticity together with high mechanical properties.
Non-magnetic.
Corrosion resistance at high temperature and in marine environments.
Suited to deep drawing, brazing, soldering and welding in strip form.
Alternatives
If this grade is not the right trade-off.
GradeChemistryYield strengthChoose it when
C97 ZeSTCuNi
Niclal 02RCuNi
Niclal 08RCuNi
Niclal 13RCuNi
Niclal 15RCuNi
Niclal 23RCuNiMn
Niclal 25RCuNi
Niclal 30ACuNiMn
Niclal 30A FeCuNiMn
Niclal 30BCuNi
Niclal 30B FeCuNiMn
Niclal 30DCuNiMn
Niclal 30RCuNi