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Copper-Nickel-SiliconBeryllium-freeIn production

NS5

CuNi2Si, CuNi3Si

NS5 is a CuNi2Si / CuNi3Si bar grade hardened by ageing. It serves oil and gas, rail and aerospace parts that need strength and wear resistance, with moderate resistance to marine corrosion.

340–590 MPaYield strength
490–650 MPaTensile strength
8–10 %Elongation
160–195 HBHardness HB
Specify this grade
Talk to our engineers

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

Bars5 variant(s)

Dimensional ranges and tolerances on request — machining and finishing are in house.

Standards

Standards & equivalences

  • 2.0855
  • CW111C
  • DTD 498
  • NFL 14701
  • RWMA Class 3

Product and process qualifications are listed above. Customer approvals are confidential and are not disclosed.

Applications

Markets & applications

Applications

  • Short-circuit rings, rotor wedges and rotor bars
  • Bearing cages and antifriction rings
  • High strength fasteners, shear pins and mechanical seals for downhole tools
  • Hydraulic valve bodies, pump components and ball valves
  • Connectors and valve guides for railway equipment
Stack of round copper-nickel-silicon bars seen end on

Why this grade

01

Compliant with CW111C, 2.0855, DTD 498 and NFL 14701.

02

Resists softening at both elevated and sub-zero temperatures.

03

Corrosion resistance in marine environments, with antifouling behaviour.

04

Cold formable in the soft temper, then hardened by ageing after forming.

Alternatives

If this grade is not the right trade-off.

Open in the Navigator, filtered
GradeChemistryYield strengthChoose it when
NS5You are hereCuNiSi590 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.
Nib1CuNiSi540 MPa
NIB2CuNiSi590 MPa
NIB3CuNiSi380 MPa
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.
NS6CuNiSi590 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.
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.