CuMn7SN Manganese Copper Alloy Flat Strip

Overview

CuMn7SN Manganese Copper Alloy Flat Strip is engineered for precision resistors and high-temperature applications, achieving an optimal balance of resistivity (0.34-0.38 μΩ·m) and tensile strength (550-700 MPa) through controlled manganese content (6.5-7.5% Mn). With superior oxidation and sulfidation resistance, it maintains stable performance from -50°C to 300°C, ideal for power electronics, industrial heaters, and automotive sensors. Compliant with IEC 60167 standards, offering fully traceable batch certifications.

Limiting Chemical Composition, %

Manganese（Mn）..............................................................................................................................6.5-7.5

Copper（Cu）.....................................................................................................................................Balance

Tin（Sn）..............................................................................................................................................0.1-0.3

Iron（Fe）...............................................................................................................................................≤0.15

Other Impurities is Si, C, S strictly controlled，Total ≤0.3.

Main Properties

Technical Specifications

Material Properties

● Resistivity Stability:

TCR≤±50 ppm/°C ensures accuracy across temperatures

● Sulfidation Resistance:

Passes 3000hr ASTM B809 sulfur exposure test

● High Fatigue Life:

＞10⁶ bending cycles (R=0.5mm radius)

● Solderability:

Compatible with Sn/Pb/Au coatings for reliable bonding

Core Advantages

● Precision Resistance Control:

±1% tolerance for medical-grade applications

● Environmental Durability:

Resists 85%RH humidity & salt spray (ASTM B117)

● Rapid Production Response:

72-hour expedited delivery available

Typical Applications

● Power Electronics:

High-current shunts, transformer windings

● Industrial Heating:

Injection molding heaters, hot runner system wiring

● Automotive Tech:

EV battery current sensors, oxygen sensor leads

● Test Equipment:

Standard resistors, bridge calibration components

Industries Served

● Renewable Energy & Energy Storage

● Industrial Automation & Robotics

● Automotive & EV Manufacturing

● Precision Instruments & Lab Equipment

● Power Transmission & Distribution

Packaging & Certifications

● Moisture/ESD-Proof: Vacuum-sealed spools with shock-absorbing liner, optional O₂-free packaging

● Certifications: IEC 60167, RoHS 2.0, ISO 9001:2015, ASTM F519

Why Choose CuMn7SN?

● Military-Grade Reliability:

Passes MIL-DTL-202H vibration & shock tests

● Global Logistics:

DDP incoterms & multi-port customs clearance

● Material Database:

Free access to temperature-resistance-stress profiles

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