Grade datasheet · 6J8
Manganin Wire 6J8
Manganin is a copper-manganese-nickel alloy engineered so that its resistance changes as little as possible with temperature. 6J8 sits at the lower-resistivity end of the Chinese 6J series, used where a slightly lower resistance value and good stability are wanted together.
0.018–6.00Diameter, mm
1 kgMinimum order
3–7 dLead time
MTCWith every lot
Identification
What this grade is called elsewhere
| System | Designation |
|---|---|
| GB / China | 6J8 |
| Family | Cu-Mn-Ni (Manganin) |
| W.Nr. | 2.1362 (CuMn12Ni) |
| Common | Manganin |
| IEC | Precision resistor material |
Grade equivalence is indicative. Confirm against the standard your drawing cites; our quotation states the designation we will produce to.
Composition
Nominal chemistry, % by weight
| Element | Nominal / limit |
|---|---|
| Mn | ≈ 8 |
| Ni | ≈ 3 |
| Cu | Balance |
| Fe | ≤ 0.50 |
Properties
What the numbers are, and where they stop
| Property | Value |
|---|---|
| Electrical resistivity, 20 °C | ≈ 0.42–0.47 µΩ·m |
| Temperature coefficient (20–60 °C) | ≈ ±20 ppm/K |
| Thermal EMF vs copper | ≈ 1–2 µV/K |
| Density | ≈ 8.40 g/cm³ |
| Max service in air | ≈ 60–100 °C (TCR-driven limit) |
| Tensile, soft | ≈ 400–500 MPa |
Nominal values for selection only. Contractual composition, tolerance and mechanical properties are stated on the inspection report issued with each shipment.
Use
Where this grade earns its place
- Precision wire-wound resistors
- Standard resistors and ratio bridges
- Measuring instrument shunts
- Reference resistors
Family: Manganin Wire
Questions we get asked
Why is the service temperature limit so low?
Because the value of manganin is its near-zero temperature coefficient, and that property degrades once the alloy is held hot. It is a measurement material, not a heating material.
How is 6J8 different from 6J12?
Mainly resistivity level and the exact manganese/nickel balance; 6J12 is the more common general-purpose grade. Tell us the resistance per metre you need and we will propose the grade.
Send the specification — diameter, grade, temper, quantity.
We come back with a confirmed lead time and the documentation we can issue for the shipment. 100 g sample at cost; orders from 1 kg.
Request a quotation Order a 100 g sample