6J12 Manganin Alloy Strip (0.19mm Thickness × 100mm Width)​

Product Overview​

6J12 manganin alloy strip (0.19mm×100mm), a high-precision resistance alloy product independently developed and manufactured by Tankii Alloy Material, is a typical manganese-copper (Mn-Cu) based precision resistance alloy. Crafted via our advanced vacuum smelting, cold-rolling, and precision annealing processes, this strip features a fixed thin gauge of 0.19mm and standard width of 100mm, achieving ultra-tight dimensional tolerances and consistent electrical properties. It integrates three core advantages of manganin alloys: ultra-low temperature coefficient of resistance (TCR), stable high resistivity, and excellent corrosion resistance—making it the preferred material for high-precision current shunts, standard resistors, and precision electrical measuring components in aerospace, metrology, and industrial control fields.​

Standard Designations & Material Foundation​

• Alloy Grade: 6J12 (Chinese standard manganin precision resistance alloy grade; belongs to Mn-Cu series)​

• International Equivalents: Similar to DIN 17471 CuMn12Ni2, ASTM B193 Manganin, UNS C75400 (for high-precision resistance scenarios)​

• Dimensional Specification: 0.19mm thickness (tolerance: ±0.002mm) × 100mm width (tolerance: ±0.1mm)​

• Compliant Standards: Adheres to GB/T 1234-2019 (Chinese standard for resistance alloy strips), IEC 60404-8-2, and JIS H3530​

• Manufacturer: Tankii Alloy Material, certified to ISO 9001 and RoHS, with 20+ years of experience in manganin alloy smelting and precision processing​

Key Advantages (vs. Common Resistance Alloys)​

The 6J12 manganin strip (0.19mm×100mm) stands out for its manganin-specific precision performance and tailored 规格 design:​

1. Extreme Resistance Stability (Core Advantage of Manganin):​

Temperature coefficient of resistance (TCR) as low as ±5 ppm/°C (-50℃ to 150℃), far superior to constantan (6J40: ±20 ppm/°C) and copper-nickel alloys (CuNi44: ±40 ppm/°C). Resistivity remains stable at 0.48±0.02 μΩ·m (20℃), with resistance drift <0.005% after 1000 hours of operation at 100℃—critical for standard resistors and high-precision current measurement (error ≤0.01%).​

2. Optimized Thin-Gauge Mechanical Balance:​

0.19mm thickness strikes a perfect balance between “miniaturization” and “processability”—thinner than 0.25mm strips (fits compact PCB designs for consumer electronics) while avoiding the brittleness of ultra-thin strips (<0.1mm). Even in half-hard temper, it maintains good bendability (minimum bending radius ≥2× thickness) and can withstand high-precision stamping without cracking.​

3. Standard Width for Efficient Batch Production:​

100mm width matches industrial precision etching and stamping die sizes, allowing simultaneous fabrication of 30-50 sets of resistor grids or shunt elements per strip. Reduces material waste by ≥25% compared to custom narrow-width strips, significantly lowering customers’ production costs and improving processing efficiency.​

4. Superior Corrosion & Current Stability:​

Manganin alloy composition (Mn-Cu-Ni) forms a dense passive film, resisting atmospheric corrosion, freshwater, and mild chemical environments (pH 4-10). Passes 1000-hour ASTM B117 salt spray testing with negligible performance decay. Meanwhile, it has low thermoelectric potential (≤1μV/℃ vs. copper), ensuring stable current transmission in low-voltage high-current circuits.​

5. Excellent Etchability for Precision Patterns:​

The strip’s uniform microstructure (grain size ≤20μm) and bright annealed surface (Ra ≤0.2μm) enable ultra-fine chemical etching—minimum etched line width up to 0.03mm, meeting the production requirements of micro-precision shunts and thin-film resistors.​

Technical Specifications​

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Product Specifications​

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Typical Applications​

• High-Precision Current Shunts: Used in ammeters, power analyzers, and EV battery management systems (BMS) – stable resistance ensures current measurement accuracy ≤0.01%.​

• Standard Resistors & Calibration Components: As the core material of laboratory standard resistors and calibration equipment – ultra-low TCR guarantees long-term calibration stability.​

• Precision Measuring Instruments: Resistance elements for pressure transducers, torque sensors, and flow meters – low thermoelectric potential reduces measurement interference.​

• Consumer Electronics: Micro-shunts for smartphone fast-charging modules and laptop power adapters – 0.19mm thin gauge fits compact PCB layouts.​

• Industrial Control Systems: Current-sensing resistors for frequency converters, programmable logic controllers (PLC), and servo drives – corrosion resistance adapts to industrial workshop environments.​

Tankii Alloy Material implements strict quality control for 6J12 manganin alloy strips (0.19mm×100mm): each batch undergoes XRF chemical composition analysis, high-precision TCR testing (using a temperature-controlled resistance tester with accuracy ±0.1 ppm/°C), laser dimensional inspection, and etching performance verification. Free samples (100mm×100mm) and detailed material test reports (MTR) are available upon request. Our technical team provides tailored support—including etching parameter optimization, temper selection for stamping processes, and resistance stability solutions for specific applications—to help customers fully leverage the precision performance of 6J12 manganin alloy.​