Monel 400 Wire - Ni70Cu28, 0.10 to 6.00 mm

Monel 400 (Ni70Cu28) nickel-copper alloy wire, drawn from 0.10 mm to 6.00 mm. Specified where corrosion resistance matters more than conductivity: seawater, hydrofluoric acid, alkalis, chemical and nuclear-adjacent service.

Grades & composition

Designation and composition.

GradeNominal compositionChinese standardNearest international reference
Monel 400
Ni70Cu28		 Ni ≥ 63 - 70 %, Cu 28 - 30 %, balance Fe and impurities Supplier specification ASTM B164 · NACE MR0175 by arrangement

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Electrical & dimensional

Supply range and condition.

PropertyValue
Resistivity @ 20 °CHigh. Confirmed on the batch inspection report.
Temperature coefficient @ 20 °CConfirmed per batch
Tensile strength (soft M, nominal)approx. 400 - 500 MPa
Elongation (soft M)≥ 35 %
Diameter range0.10 - 6.00 mm
TemperM / Y2 / Y
SurfaceBright / as drawn
Values above are nominal. Composition, resistivity, temperature coefficient of resistance (TCR) and thermal EMF are confirmed by the inspection report issued with each shipment - this page confirms feasibility and range, it is not the inspection certificate.

Typical applications

Where this grade is specified.

  • Corrosion-resistant structural and fastening wire
  • Specialty welding wire for nickel-copper assemblies
  • Marine and seawater service
  • Chemical processing and nuclear-adjacent service
  • Pump, valve and heat-exchanger components

When Monel is the right call: when the environment is the specification. Monel resists seawater, hydrofluoric acid and alkalis and keeps its strength at moderate temperature. If conductivity or a specific resistance value is the priority instead, a copper-nickel NC grade is the better tool - Monel vs Cu-Ni comparison.

Ni70Cu28 Seawater Chemical service ASTM B164 reference
Monel 400 Wire coil
Monel 400 Wire - supplied in the temper your drawing calls for.

Order facts

What you need before you send a drawing.

Minimum orderSample 100 g at cost · orders from 1 kg · production pricing from 5 kg
Standard lead time3 - 7 days from order confirmation
Temper suppliedM (soft) / Y2 (half-hard) / Y (hard)
Diameter0.10 - 6.00 mm round wire
HS classificationHS 7505.22 (nickel-alloy wire)
DocumentsMaterial test certificate standard; third-party test report on request
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Export & compliance

Stated plainly, not oversold.

Export note - nickel-containing material to the United States: assess California Prop 65 (metallic nickel is listed with no safe harbour). To the EU: observe REACH nickel release limits and the General Product Safety Regulation (GPSR), which applies from 2026-06-01 and requires an EU-based responsible person. Bare alloy wire is a raw material, not a finished electrical device, so UL / CSA / CE device marks do not apply to it. Composition, resistivity, TCR and thermal EMF are stated as nominal on this page and are confirmed by the inspection report issued with each shipment.
Related selection notes: Monel 400 vs Cu-Ni · Choosing the temper

Next step

Send the grade, diameter, temper and quantity.

Tell us what the wire has to do and the date your line needs it. We come back with a confirmed lead time, the achievable tolerance and the documents we can issue. Sample 100 g at cost; orders from 1 kg; production pricing from 5 kg.

Request a Quotation Samples & trial orders