Constantan Alloy Flat Wire 6j40

Overview

Constantan Alloy Flat Wire 6J40 is engineered for precision resistive applications with near-zero temperature coefficient (TCR≤±20ppm/°C), maintaining ±0.5% resistivity stability from -50°C to +400°C. Its superior oxidation resistance and fatigue performance make it ideal for industrial heaters, sensor bridges, and thermocouple compensation wires. ISO/IEC 17025 certified, 6J40 wire meets stringent material consistency requirements in medical and aerospace industries.

Limiting Chemical Composition, %

Nickel（Ni）............................................................................................................................................39.0-41.0

Manganese（Mn）.....................................................................................................................................1.0-2.0

Copper（Cu）..................................................................................................................................................Rest

The Else is no

Main Properties

Technical Specifications

Material Properties

● Resistivity Stability:

ΔR/R≤0.5% across temperature range ensures measurement accuracy

● Low Thermal EMF:

Cu-Constantan pair EMF≤40μV/°C

● Creep Resistance:

＜0.2% creep after 1000hrs at 400°C

● Surface Uniformity:

Ra≤0.1μm ultra-smooth surface minimizes contact resistance

Core Advantages

● Versatility:

Ideal for high-temperature, high-stress, and precision applications.

● Cost-Efficiency:

Extended lifespan reduces maintenance costs.

● Eco-Friendly Compliance:

Meets RoHS and ISO standards for sustainability.

Typical Applications

● Precision Measurement:

Strain gauge & Wheatstone bridge wiring

● Thermal Management:

Industrial furnace coils, semiconductor thermal control

● Energy Systems:

Fuel cell interconnects, solar thermal collectors

● Automotive Electronics:

Engine pressure sensors, BMS wiring

Industries Served

● Precision Instruments & Test Measurement

● Power Electronics & Energy Conversion

● Automotive & Rail Transport

● Medical Diagnostic Equipment

● Aerospace Thermal Management

Packaging & Certifications

● Anti-Oxidation Packaging: Inert gas-sealed spools + vacuum aluminum bags

● Certifications: ISO/IEC 17025, RoHS 3, REACH, UL 758

Why Choose 6J40?

● Zero-Compromise Quality:

Individual material analysis reports with ICP-OES testing

● Customization Service:

Resistivity fine-tuning (±5%) & specialty coating options

● Technical Support:

Free thermo-electro-mechanical simulation models

Available Forms

We provide you with a variety of product forms, including but not limited to

● Strip & Foil

● Round Wire &Flat Wire

● Bar & Rod

● Electrothermal Strip

● Flange & Ring

● Wire & Welding

● Reststance Wire

● Electric Alloy Wire

● Electric Furnace Bar

● Customize