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High Stability 6J11 New Constantan Alloy Strip Suitable For Manufacturing Precision Instrument
6J11 New Constantan Alloy Strip
Product Overview
6J11 new constantan alloy strip is a high-performance precision resistance alloy product independently developed by Tankii Alloy Material. This copper-nickel-manganese (Cu-Ni-Mn) based alloy is optimized for medium-temperature precision applications through advanced vacuum smelting, multi-pass precision cold-rolling, and controlled atmosphere annealing processes.
Key characteristics include:
- Stable electrical and mechanical properties within 0-120℃ operating range
- Density of 8.5g/cm³ and resistivity of 0.49μΩ*m
- Low resistance temperature coefficient (TCR)
- Excellent corrosion resistance and superior processing performance
- Ideal for precision resistors, current shunts, and strain gauges in consumer electronics, industrial control, and automotive systems
Standard Designations & Material Foundation
- Alloy Grade: 6J11 (Chinese standard new constantan alloy grade)
- International Equivalents: Comparable to DIN 17471 CuNi44Mn1.5 and ASTM B193 modified constantan
- Core Parameters: 0-120℃ operating range; density 8.5g/cm³; resistivity 0.49μΩ*m (20℃)
- Compliant Standards: GB/T 1234-2019, IEC 60404-8-2, and RoHS 2.0
- Manufacturer: Tankii Alloy Material (ISO 9001 and ISO 14001 certified)
Key Advantages
1. Stable Electrical Performance in Medium-Temperature Range
- Resistivity stably maintained at 0.49μΩ*m (20℃)
- TCR as low as ±15 ppm/℃ (0-120℃ range)
- Resistance drift <0.008% after 1000 hours at 120℃
2. Balanced Mechanical & Processing Performance
- Density of 8.5g/cm³ (12% lower than nickel-chromium alloys)
- Tensile strength 480-550 MPa (annealed state)
- Elongation ≥25% with 180° bending capability
3. Reliable Corrosion & Environmental Adaptability
- Passes 1000-hour ASTM B117 salt spray testing
- Low thermoelectric potential (≤2μV/℃ vs. copper)
- Resists atmospheric corrosion, freshwater, and mild chemical environments
Technical Specifications
| Attribute | Value (Typical) | Application Significance |
|---|---|---|
| Chemical Composition (wt%) | Cu: 55.0-57.0%; Ni: 41.0-43.0%; Mn: 1.0-2.0% | Mn content optimized for TCR stability |
| Thickness | 0.05-2.0mm (±0.002mm for ≤0.2mm) | 0.05-0.1mm for micro-electronics |
| Width | 10-300mm (±0.1mm for ≤100mm) | 10-50mm for small components |
| Resistivity (20℃) | 0.49μΩ*m (±0.02μΩ*m) | Balanced for 1-10A current shunts |
| Temperature Coefficient | ±15 ppm/℃ (0-120℃) | Ensures resistance stability |
Product Specifications
| Item | Specification | Processing/Application Advantage |
|---|---|---|
| Surface Finish | Bright annealed or matte finish | Bright for precision etching; matte for anti-glare |
| Flatness | ≤0.05mm/m | Ensures uniform thickness |
| Supply Form | Rolls (50m-300m) or cut-to-length (≥50mm) | Rolls for mass production |
| Weldability | Suitable for spot and TIG welding | Welded joints variation ≤0.1% |
Typical Applications
- Consumer Electronics: Micro-current shunts in fast-charging adapters (0.08-0.1mm thickness)
- Automotive Systems: Current-sensing resistors for in-car USB charging modules
- Industrial Control: Resistance elements for pressure transmitters and flow meters
- Wearable Devices: Strain gauge grids in smart watch heart rate sensors
Quality Assurance
Tankii Alloy Material implements strict quality control including:
- XRF chemical composition analysis
- High-precision four-point probe resistivity testing
- Universal testing machine for mechanical properties
- Detailed material test reports (MTR) available
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