Grade datasheet · 6J12
Manganin Wire 6J12
The general-purpose manganin grade. Low temperature coefficient, a small thermal EMF against copper, and resistance that stays put batch after batch — the three things a shunt or a standard resistor actually depends on.
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 | 6J12 |
| Family | Cu-Mn-Ni (Manganin) |
| W.Nr. | 2.1362 |
| Common | Manganin / CuMn12Ni |
| 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 | ≈ 12 |
| Ni | ≈ 2–3 |
| Cu | Balance |
| Fe | ≤ 0.50 |
Properties
What the numbers are, and where they stop
| Property | Value |
|---|---|
| Electrical resistivity, 20 °C | ≈ 0.47 µΩ·m |
| Temperature coefficient (20–60 °C) | ≈ ±10–20 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 shunts for meters and BMS
- Standard resistors
- Load bank and braking resistors
- Ratio bridges and calibration equipment
Family: Manganin Wire
Questions we get asked
Do you supply 6J12 below 0.05 mm?
0.05 mm is the routine minimum. Finer is quoted case by case — it is a drawing question, not a metallurgy question.
Can you hold resistance per metre to a tolerance?
Yes, on the measured value per spool. State the target Ω/m and the tolerance you need and we will confirm before production.
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