Name: 6J12 Precision Resistance Alloy Tube Stable Resistivity Low Temp Coefficient
Brand: Huona
Price: 1 USD

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6J12 Precision Resistance Alloy Tube Stable Resistivity Low Temp Coefficient

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Brand Name:	Huona
Model Number:	6J12
Certification:	ISO9001
Place of Origin:	Shanghai
MOQ:	10kg
Price:	Nogotiable
Payment Terms:	L/C,T/T,MoneyGram,Western Union
Supply Ability:	500 tons per month
Delivery Time:	5-21 days
Packaging Details:	Carton/Wooden case
Product Name:	6J12 Precision Resistance Alloy Tube
Outer Diameter Range:	2mm - 50mm (tolerance: ±0.05mm for ≤10mm; ±0.1mm for >10mm)
Wall Thickness Range:	0.2mm - 5mm (tolerance: ±0.02mm for ≤1mm; ±0.05mm for >1mm)
Resistivity (20℃):	0.48±0.02 μΩ·m
Temperature Coefficient of Resistance (TCR):	±5 ppm/°C (-50℃ to 150℃)
Thermoelectric Potential (vs Cu):	≤1 μV/℃ (0℃ to 100℃)
Operating Temperature Range:	-50℃ to 120℃ (continuous); Short-term: up to 150℃ (≤1 hour)
Tensile Strength:	Soft (annealed): 450-500 MPa; Half-hard: 550-600 MPa; Hard: 650-700 MPa

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Huona (Shanghai) New Material Co., Ltd.

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6J12 Precision Resistance Alloy Tube Stable Resistivity Low Temp Coefficient

Product Description

6J12 Precision Resistance Alloy Tube

Product Overview

6J12 precision resistance alloy tube, a high-performance functional
alloy product independently developed and manufactured by Huona New
Material, is a typical manganese-copper (Mn-Cu) based precision
resistance alloy tube. Crafted via advanced vacuum smelting,
precision extrusion, and controlled atmosphere annealing processes,
this tube maintains the core performance advantages of 6J12 alloy
while featuring a hollow tubular structure. It integrates ultra-low temperature coefficient of resistance (TCR), stable high resistivity, and excellent mechanical strength—making it an ideal material for precision current shunts,
high-stability sensor casings, and special resistance components in
aerospace, metrology, and industrial control fields that require
both resistance performance and structural lightweight.

Standard Designations & Material Foundation

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

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

Form: Seamless tube (standard); welded tube (customizable for large-diameter specifications)

Compliant Standards: Adheres to GB/T 1234-2019 (Chinese standard for resistance alloys), GB/T 8890-2015 (standards for seamless copper alloy tubes), and IEC 60404-8-2

Manufacturer: Huona New Material, certified to ISO 9001 and RoHS, with specialized production lines for precision alloy tube extrusion and processing

Key Advantages (vs. Common Alloy Tubes & Solid 6J12 Bars)

6J12 alloy tube stands out for its unique combination of resistance
performance and tubular structural advantages:

Superior Resistance Stability (Core Advantage of 6J12):

Temperature coefficient of resistance (TCR) as low as ±5 ppm/°C
(-50℃ to 150℃), far lower than constantan alloy tubes (±20 ppm/°C)
and copper alloy tubes (±4000 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 precision current
measurement and resistance control.

Tubular Structure Advantage:

Hollow structure achieves 30-50% weight reduction compared to solid
6J12 bars of the same outer diameter, meeting lightweight
requirements for aerospace and automotive electronic components.
Meanwhile, the inner cavity can be used for heat dissipation or as
a channel for fluid medium, expanding application scenarios (e.g.,
integrated sensor tubes with both resistance sensing and fluid
guiding functions).

Excellent Mechanical & Processing Performance:

Seamless extrusion process ensures uniform wall thickness and
structural integrity—tensile strength reaches 450-500 MPa (annealed
state) and elongation ≥25%, enabling bending, flaring, and
threading without cracking. The smooth inner/outer surfaces (Ra
≤0.8μm) reduce fluid resistance and facilitate precise resistance
value calibration.

Strong Corrosion & Thermal Stability:

Mn-Cu-Ni alloy composition 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. Low thermoelectric potential (≤1μV/℃
vs. copper) ensures stable signal transmission in low-voltage
circuits.

Technical Specifications

Attribute
Value (Typical)
Chemical Composition (wt%)
Cu: 84.0-86.0%; Mn: 11.0-13.0%; Ni: 2.0-3.0%; Fe: ≤0.3%; Si: ≤0.1%;
C: ≤0.05%
Outer Diameter Range
2mm - 50mm (tolerance: ±0.05mm for ≤10mm; ±0.1mm for >10mm)
Wall Thickness Range
0.2mm - 5mm (tolerance: ±0.02mm for ≤1mm; ±0.05mm for >1mm)
Length
500mm - 6000mm (cut-to-length available: ≥100mm)
Resistivity (20℃)
0.48±0.02 μΩ·m
Temperature Coefficient of Resistance (TCR)
±5 ppm/°C (-50℃ to 150℃)
Thermoelectric Potential (vs Cu)
≤1 μV/℃ (0℃ to 100℃)
Operating Temperature Range
-50℃ to 120℃ (continuous); Short-term: up to 150℃ (≤1 hour)
Tensile Strength
Soft (annealed): 450-500 MPa; Half-hard: 550-600 MPa; Hard: 650-700
MPa
Elongation (25℃)
Soft: ≥25%; Half-hard: 15-20%; Hard: ≤10%
Hardness (HV)
Soft: 130-150; Half-hard: 180-200; Hard: 230-250
Surface Roughness (Ra)
Inner/Outer: ≤0.8μm (polished finish optional: ≤0.2μm)

Product Specifications

Item
Specification
Tube Type
Seamless tube (standard); welded tube (custom for outer diameter
>50mm)
Surface Finish
Bright annealed (oxide-free, oil-free); optional polished finish
for high-precision applications
Roundness
≤0.05mm (for outer diameter ≤10mm); ≤0.1mm (for outer diameter
>10mm)
Straightness
≤1mm/m
Machinability
Compatible with CNC turning, milling, threading, and flaring; no
burrs after processing
Weldability
Suitable for TIG welding and spot welding—welded joints have
resistance variation ≤0.1%
Packaging
Vacuum-sealed in anti-oxidation aluminum foil bags with desiccants;
wooden crates or steel frames for long-length tubes to prevent
deformation
Customization
Non-standard outer diameter/wall thickness; special temper
adjustment; inner cavity polishing; anti-tarnish passivation
treatment

Typical Applications

Precision Current Shunts: Tubular current shunts for high-voltage power meters and EV battery management systems (BMS)—hollow structure facilitates heat dissipation, ensuring stable resistance under high-current conditions.

Special Sensor Casings: Integrated sensor tubes for pressure/temperature composite sensors—6J12's resistance stability enables accurate signal conversion, while the inner cavity accommodates sensing elements.

Aerospace Components: Lightweight resistance tubes for aircraft avionics and satellite communication equipment—weight reduction meets aerospace payload requirements without compromising performance.

Industrial Control Valves: Resistance-adjustable control valves for fluid systems—6J12's resistance performance enables precise flow control, and the tubular structure serves as a fluid channel.

Metrology Equipment: Standard resistance tubes for laboratory calibration instruments—ultra-low TCR ensures long-term calibration accuracy (error ≤0.01%).

Huona New Material implements strict quality control for 6J12 alloy
tubes: each batch undergoes XRF chemical composition analysis,
high-precision TCR testing (temperature-controlled resistance
tester with accuracy ±0.1 ppm/°C), wall thickness uniformity
inspection (ultrasonic thickness gauge), and pressure resistance
testing (for fluid-carrying applications). Free samples (100mm
length) and detailed material test reports (MTR) are available upon
request. Our technical team provides tailored support—including
tube size optimization, processing technology guidance, and
resistance performance matching—to help customers maximize the
application value of 6J12 alloy tubes.

Product Tags:

precision resistance alloy tube

low temp coefficient resistor

stable resistivity alloy tube

6J12 Precision Resistance Alloy Tube Stable Resistivity Low Temp Coefficient

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Attribute	Value (Typical)
Chemical Composition (wt%)	Cu: 84.0-86.0%; Mn: 11.0-13.0%; Ni: 2.0-3.0%; Fe: ≤0.3%; Si: ≤0.1%; C: ≤0.05%
Outer Diameter Range	2mm - 50mm (tolerance: ±0.05mm for ≤10mm; ±0.1mm for >10mm)
Wall Thickness Range	0.2mm - 5mm (tolerance: ±0.02mm for ≤1mm; ±0.05mm for >1mm)
Length	500mm - 6000mm (cut-to-length available: ≥100mm)
Resistivity (20℃)	0.48±0.02 μΩ·m
Temperature Coefficient of Resistance (TCR)	±5 ppm/°C (-50℃ to 150℃)
Thermoelectric Potential (vs Cu)	≤1 μV/℃ (0℃ to 100℃)
Operating Temperature Range	-50℃ to 120℃ (continuous); Short-term: up to 150℃ (≤1 hour)
Tensile Strength	Soft (annealed): 450-500 MPa; Half-hard: 550-600 MPa; Hard: 650-700 MPa
Elongation (25℃)	Soft: ≥25%; Half-hard: 15-20%; Hard: ≤10%
Hardness (HV)	Soft: 130-150; Half-hard: 180-200; Hard: 230-250
Surface Roughness (Ra)	Inner/Outer: ≤0.8μm (polished finish optional: ≤0.2μm)

Item	Specification
Tube Type	Seamless tube (standard); welded tube (custom for outer diameter >50mm)
Surface Finish	Bright annealed (oxide-free, oil-free); optional polished finish for high-precision applications
Roundness	≤0.05mm (for outer diameter ≤10mm); ≤0.1mm (for outer diameter >10mm)
Straightness	≤1mm/m
Machinability	Compatible with CNC turning, milling, threading, and flaring; no burrs after processing
Weldability	Suitable for TIG welding and spot welding—welded joints have resistance variation ≤0.1%
Packaging	Vacuum-sealed in anti-oxidation aluminum foil bags with desiccants; wooden crates or steel frames for long-length tubes to prevent deformation
Customization	Non-standard outer diameter/wall thickness; special temper adjustment; inner cavity polishing; anti-tarnish passivation treatment