Copper-Nickel-SiliconBeryllium-freeIn production
NS6
CuNi3Si · C18000
NS6 is a CuNi3Si bar grade hardened by ageing, with the highest electrical conductivity of our nickel-silicon bars. Welding equipment makers and die casters use it for resistance welding parts and plunger tips.
345–590 MPaYield strength
610–655 MPaTensile strength
9 %Elongation
195 HBHardness HB
Specify this grade
Qualification packs are released after a short form. Export control applies.
Properties
Guaranteed values, by temper.
- Alloy family
- Copper-Nickel-Silicon
- Chemistry family
- CuNiSi
- Lead-free
- Yes
Forms
Forms & dimensions available
Bars9 variant(s)
Dimensional ranges and tolerances on request — machining and finishing are in house.
Standards
Standards & equivalences
- RWMA Class 3
Product and process qualifications are listed above. Customer approvals are confidential and are not disclosed.
Applications
Markets & applications
Applications
- Parts for resistance welding
- Plunger tips for die casting machines
- Inserts for plastic injection moulds
Why this grade
Compliant with RWMA Class 3, the class used for resistance welding electrodes.
Higher electrical conductivity than NS5 and NS30, with the same thermal conductivity as NS5.
Antifriction properties for parts that slide or seat under load.
Cold formable in the quenched condition, then hardened after forming.
Alternatives
If this grade is not the right trade-off.
GradeChemistryYield strengthChoose it when
NS6You are hereCuNiSi590 MPaChoose it when the bar becomes resistance welding parts or electrodes, where RWMA Class 3 and conductivity matter more than the strength of NS30 or the standards covered by NS5.
NS30CuNiSiCr800 MPaChoose it when strength and heat dissipation come first, as in valve seats or mould inserts, and the part needs less electrical conductivity than NS6 or NS5 provide.
NS5CuNiSi590 MPaChoose it when the part must comply with CW111C, 2.0855, DTD 498 or NFL 14701, or works near seawater, and NS30's higher strength is not needed.
NS8CuNiSiCr
Siclanic FCuNiSi
Siclanic MCuNiSi
Siclanic SCuNiSi590 MPaChoose it when the part is stamped or bent from strip, such as a contact blade or relay spring, where NS30, NS5 and NS6 are supplied as bars.