CuNi3si1mg (C70250) High-Strength & High-Conductivity Cu-Ni-Si-Mg Alloy Solution for Connectors & High-Temp Springs

Product Details
Customization: Available
Application: Relays/Switches
certification: ASTM B888
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Number of Employees
355
Year of Establishment
2002-03-07
  • CuNi3si1mg (C70250) High-Strength & High-Conductivity Cu-Ni-Si-Mg Alloy Solution for Connectors & High-Temp Springs
  • CuNi3si1mg (C70250) High-Strength & High-Conductivity Cu-Ni-Si-Mg Alloy Solution for Connectors & High-Temp Springs
  • CuNi3si1mg (C70250) High-Strength & High-Conductivity Cu-Ni-Si-Mg Alloy Solution for Connectors & High-Temp Springs
  • CuNi3si1mg (C70250) High-Strength & High-Conductivity Cu-Ni-Si-Mg Alloy Solution for Connectors & High-Temp Springs
  • CuNi3si1mg (C70250) High-Strength & High-Conductivity Cu-Ni-Si-Mg Alloy Solution for Connectors & High-Temp Springs
  • CuNi3si1mg (C70250) High-Strength & High-Conductivity Cu-Ni-Si-Mg Alloy Solution for Connectors & High-Temp Springs
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Basic Info.

Model NO.
C70250
Temperature Classification
High Temperature Piping
MPa Classfication
Ultra High Pressure Piping
Material
Copper Alloy
Standard
ASTM, GB, API, DIN, JIS, BS
Medium
Liquid
Cross-Section Shape
Round
Connection Type
Seamless
Diameter
419mm
Transport Package
Wooden Case
Specification
1.2m*1.2m*L
Trademark
Hehong
Origin
China
Production Capacity
600ton/Month

Packaging & Delivery

Package Size
80.00cm * 80.00cm * 80.00cm
Package Gross Weight
1.000kg

Product Description

Product Details for CuNi3Si1Mg (C70250)

 
1. Core Specifications
Item Details
Grade CuNi3Si1Mg (UNS C70250)
Standard ASTM B888, RoHS & ELV Compliant
Composition Cu (Balance), Ni 3%, Si 0.65%, Mg 0.15%, Pb <0.05%
Material Type Precipitation-Hardened High Copper Alloy
 
2. Key Advantages

High Strength: Tensile strength 620-900 MPa, yield strength 450-750 MPa (varies by temper).
 High Conductivity: Electrical conductivity 25-34 MS/m (45-60% IACS), superior to standard bronze/brass.
 Stress Relaxation Resistance: Maintains >70% residual stress at 200°C.
 Formability: Excellent cold workability (minimum bending radius: 2× thickness).
 Eco-Certified: Lead-free, compliant with RoHS & ELV.

 
3. Typical Applications
Industry Applications
Electronics High-density connectors, CPU sockets, relay springs, micro-switch contacts
Automotive Fuel injection components, sensor terminals, battery connectors
Industrial Equipment High-temperature springs, solenoid coils, precision instrument contacts
Renewable Energy PV junction boxes, EV charging port components
 
4. Physical & Mechanical Properties
Parameter Typical Value Test Standard
Density 8.82 g/cm³ ISO 1183
Thermal Conductivity 190 W/(m·K) ASTM E1461
Thermal Expansion (0-300°C) 17.6×10-6/K ASTM E228
Elastic Modulus 131 GPa ASTM E111
Hardness (HV) 180-270 (depends on temper) ASTM E384
 
5. Processing & Heat Treatment
  • Cold Working: Suitable for stamping/bending (min. bend radius: 2× thickness).
  • Welding: Recommended methods: TIG/MIG (excellent), soft soldering (good).
  • Heat Treatment:
    • Soft Annealing: 600-700°C ×1-3h
    • Hot Working: 800-950°C
 
6. Available Forms & Dimensions
Form Size Range Custom Options
Strip Thickness: 0.1mm-5.0mm, Width: ≥3mm Hot-dip tinned, contour-milled, coatings
Sheet Thickness: 0.5mm-10mm Mechanical/electrolytic polishing
Wire Diameter: 0.5mm-20mm Precision cold-drawn/polished
Tube OD: 3mm-50mm, Wall: 0.2mm-5mm Seamless/welded customization
 
7. Certifications & Support
  • Certifications: ASTM B888, RoHS, ELV; Mill Certificates available.
  • Testing Reports: Mechanical properties, conductivity, metallurgical analysis.
  • Customization: Non-standard sizes, surface treatments (tin/silver plating).


Company Reference
CuNi3si1mg (C70250) High-Strength &amp; High-Conductivity Cu-Ni-Si-Mg Alloy Solution for Connectors &amp; High-Temp Springs
CuNi3si1mg (C70250) High-Strength &amp; High-Conductivity Cu-Ni-Si-Mg Alloy Solution for Connectors &amp; High-Temp Springs


     
CuNi3si1mg (C70250) High-Strength &amp; High-Conductivity Cu-Ni-Si-Mg Alloy Solution for Connectors &amp; High-Temp Springs
Jiangyin Hehong Precision Technology (HHP COPPER /Jiangyin New Huahong Copper Industry Co., Ltd. ) is a Branch of Huahong Group (A-STOCK : 002645.SZ), a famous Copper Alloy products manufacturer in eastern China, near to Shanghai.


      We are specializing at the production of copper and copper alloy (admiralty brass/naval brass, aluminum brass, cupronickel/copper nickel) condenser tube, efficient heat exchange tube, large diameter copper nickel pipe, copper alloy forged flanges, oxygen-free copper products and  railway ground cable, has been formed annual production capacity of more than 30000 tons of copper products. Products are widely used on seawater desalination, nuclear power, petrochemical, marine, steam turbine, pressure vessels, heat exchangers, central air-conditioning, household appliances and railway transit, etc.
      And we wrote the National Standard of copper alloy seamless tube/pipe for Nuclear Power!

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