Product Description
6J11 New Constantan Alloy Strip
Product Overview
6J11 new constantan alloy strip, a high-performance precision
resistance alloy product independently developed and manufactured
by Huona New Material, is a copper-nickel-manganese (Cu-Ni-Mn)
based new constantan alloy strip optimized for medium-temperature
precision applications. Crafted via advanced vacuum smelting,
multi-pass precision cold-rolling, and controlled atmosphere
annealing processes, this strip maintains stable electrical and
mechanical properties within its applicable temperature range of
0-120℃. With a density of 8.5g/cm³ and resistivity of 0.49μΩ·m, it
integrates low resistance temperature coefficient (TCR), excellent corrosion resistance, and superior processing performance—becoming the core material for precision resistors, current
shunts, and strain gauges in consumer electronics, industrial
control, and automotive low-temperature electrical systems.
Standard Designations & Material Foundation
Alloy Grade: 6J11 (Chinese standard new constantan alloy grade; upgraded
version of traditional constantan 6J40 with optimized Mn content)
International Equivalents: Performance comparable to DIN 17471 CuNi44Mn1.5 and ASTM B193
modified constantan, with better medium-temperature stability
Core Basic Parameters: Applicable temperature range 0-120℃; density 8.5g/cm³;
resistivity 0.49μΩ·m (20℃); customizable thickness 0.05-2.0mm,
width 10-300mm (common specifications: 0.1mm×50mm, 0.19mm×100mm,
0.25mm×150mm)
Compliant Standards: Adheres to GB/T 1234-2019 (Chinese standard for resistance alloy
strips), IEC 60404-8-2, and RoHS 2.0 environmental standards
Manufacturer: Huona New Material, certified to ISO 9001 and ISO 14001, with 20+
years of experience in copper-nickel alloy smelting and precision
rolling
Key Core Advantages (Based on Core Parameters)
1. Stable Electrical Performance in Medium-Temperature Range
Optimized Resistivity Matching: Resistivity stably maintained at 0.49μΩ·m (20℃), 5% higher than
traditional 6J40 constantan (0.47μΩ·m)—enabling smaller volume of
resistors and shunts under the same resistance requirement, which
is critical for miniaturized consumer electronics (e.g., smartphone
fast-charging modules).
Low TCR for Precision Measurement: Within the applicable temperature range of 0-120℃, TCR is as low
as ±15 ppm/℃, and resistance drift is <0.008% after 1000 hours
of continuous operation at 120℃—far superior to copper-nickel
alloys (±40 ppm/℃) and ensuring measurement accuracy ≤0.05% for
precision instruments.
2. Balanced Mechanical & Processing Performance
Density Advantage for Lightweight Design: Density of 8.5g/cm³ is 12% lower than nickel-chromium alloys
(9.2g/cm³)—reducing the weight of resistor assemblies by 10-15% for
portable electronic devices (e.g., wearable health monitors) and
automotive on-board electronics.
Excellent Ductility & Machinability: Tensile strength reaches 480-550 MPa (annealed state), elongation
≥25%—enabling 180° bending (minimum radius ≥2× thickness) without
cracking. The uniform microstructure (grain size ≤20μm) supports
ultra-fine chemical etching with minimum line width 0.03mm, meeting
the production of high-density resistor arrays.
3. Reliable Corrosion & Environmental Adaptability
The Cu-Ni-Mn alloy system forms a dense passive oxide film,
resisting atmospheric corrosion, freshwater, and mild chemical
environments (pH 4-10). It passes 1000-hour ASTM B117 salt spray
testing with no obvious corrosion. Meanwhile, it has low
thermoelectric potential (≤2μV/℃ vs. copper) within 0-120℃,
effectively reducing measurement interference in low-voltage
circuits—ideal for automotive interior electronics and household
appliances with stable temperature environments.
Technical Specifications (With Core Parameter Details)
Attribute | Value (Typical) | Application Significance |
|---|
Chemical Composition (wt%) | Cu: 55.0-57.0%; Ni: 41.0-43.0%; Mn: 1.0-2.0%; Fe: ≤0.5%; Si: ≤0.1% | Mn content optimized to enhance medium-temperature TCR stability |
Thickness | 0.05-2.0mm (tolerance: ±0.002mm for ≤0.2mm) | 0.05-0.1mm for micro-electronics; 0.5-2.0mm for industrial shunts |
Width | 10-300mm (tolerance: ±0.1mm for ≤100mm) | 10-50mm for small components; 100-300mm for batch stamping |
Resistivity (20℃) | 0.49μΩ·m (tolerance: ±0.02μΩ·m) | Balanced for 1-10A current shunts and precision resistors |
Applicable Temperature Range | 0-120℃ (continuous); Short-term: up to 150℃ (≤1 hour) | Covers consumer electronics (0-60℃) and automotive interior (0-80℃)
scenarios |
Temperature Coefficient of Resistance (TCR) | ±15 ppm/℃ (0-120℃) | Ensures resistance stability in medium-temperature environments |
Density (25℃) | 8.5g/cm³ | Reduces weight of portable electronic components |
Tensile Strength | Soft (annealed): 480-550 MPa; Half-hard: 580-650 MPa | Meets stamping and bending requirements of different processes |
Elongation (25℃, Annealed) | ≥25% | Enables complex forming for sensor leads and resistor brackets |
Thermoelectric Potential (vs Cu) | ≤2μV/℃ (0-120℃) | Reduces measurement interference in low-voltage circuits |
Product Specifications (With Application Support)
Item | Specification | Processing/Application Advantage |
|---|
Surface Finish | Bright annealed (oxide-free, oil-free); matte finish (customizable) | Bright finish supports precision etching; matte finish for
anti-glare needs |
Flatness | ≤0.05mm/m | Ensures uniform thickness during stamping, avoiding resistance
deviation |
Supply Form | Rolls (50m-300m per spool); cut-to-length (≥50mm) | Rolls for mass production; cut-to-length for small-batch prototypes |
Weldability | Suitable for spot welding and TIG welding | Welded joints have resistance variation ≤0.1% for shunt assemblies |
Packaging | Vacuum-sealed aluminum foil bags + desiccants; wooden spools | Prevents oxidation and deformation during storage/transportation |
Customization | Temper adjustment (soft/half-hard); width slitting; anti-tarnish
passivation | Adapts to stamping, bending, and long-term storage needs |
Typical Application Scenarios
1. Consumer Electronics
Used for micro-current shunts in 65W-120W fast-charging adapters
(0.08-0.1mm thickness) and precision resistors in smart home
controllers—0.49μΩ·m resistivity enables miniaturized design, and
0-120℃ applicable temperature adapts to the heat generation of
charging modules (up to 80℃).
2. Automotive Low-Temperature Electrical Systems
Applied in current-sensing resistors for in-car USB charging
modules and body control modules (BCM)—8.5g/cm³ low density reduces
component weight, and excellent corrosion resistance adapts to the
humid environment in the car (avoiding resistance degradation
caused by condensation).
3. Industrial Control Instruments
As resistance elements for pressure transmitters and flow meters in
low-temperature workshops (0-100℃)—low TCR (±15 ppm/℃) ensures
measurement accuracy ≤0.05%, and good machinability supports the
production of complex resistor grids for signal conversion.
4. Wearable Electronic Devices
Used for strain gauge grids in smart watch heart rate sensors and
fitness bracelets—thin gauge (0.05-0.08mm) fits the slim design of
wearable devices, and high elongation (≥25%) enables repeated
bending without breaking during wearing.
Quality Assurance & Technical Support
Huona New Material implements strict quality control for 6J11 new
constantan alloy strips:
Material Inspection: XRF chemical composition analysis (ensures Ni/Mn content meets
standard) and density testing (via Archimedes method, accuracy
±0.01g/cm³).
Electrical Performance Testing: High-precision four-point probe tester (resistivity accuracy
±0.005μΩ·m) and temperature-controlled TCR tester (0-120℃, accuracy
±0.5 ppm/℃).
Mechanical & Processing Testing: Universal testing machine (tensile/elongation) and micro-etching
test (verifying 0.03mm line width processing capability).
Detailed material test reports (MTR) are available upon request.
Our technical team provides tailored support—including etching
parameter optimization for micro-resistors and temper selection for
stamping processes—to help customers maximize the performance of
6J11 in medium-temperature precision scenarios.
