Discover the sophisticated details of CuNi3Si1Mg (C70250) - a testament to advanced materials engineering, elevating industry standards through impeccable quality and design.
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
Robust Strength for Demanding Environments: Exhibiting impressive tensile strength ranging from 620-900 MPa and yield strength between 450-750 MPa, adapted to varying temper conditions, this alloy meets high-performance needs.
Superior Conductivity for Optimal Performance: With an electrical conductivity spanning 25-34 MS/m or 45-60% IACS, our alloy outperforms traditional bronze and brass, ensuring exceptional electrical efficiency.
Resilience Against Stress Relaxation: Capable of maintaining over 70% residual stress even at temperatures reaching 200°C, guaranteeing sustained reliability under challenging conditions.
Outstanding Formability: Demonstrates excellent cold workability with a minimal bending radius of just 2× the thickness, offering versatility in design and application.
Environmentally Responsible: Our lead-free product adheres to RoHS & ELV directives, promoting sustainability and environmental safety.
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 Techniques: Ideal for stamping and bending processes, requiring a minimum bend radius of 2× the material's thickness.
- Advanced Welding Options: Employ preferred techniques like TIG/MIG for excellent results, with soft soldering offering good performance.
- Heat Treatment Protocols:
- Soft Annealing: Conducted at 600-700°C for 1-3 hours, ensuring optimal material softness.
- Hot Working: Executed at temperatures ranging from 800-950°C, facilitating enhanced material manipulation.
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: Compliant with ASTM B888, RoHS, and ELV standards, with Mill Certificates accessible for validation.
- Comprehensive Testing Reports: Includes detailed analysis on mechanical properties, conductivity, and metallurgical characteristics, ensuring quality assurance.
- Customization Options: Offering non-standard sizes and specialized surface treatments such as tin or silver plating to meet unique requirements.
Company Reference
Jiangyin Hehong Precision Technology (HHP COPPER /Jiangyin New Huahong Copper Industry Co., Ltd. ), a distinguished segment of the Huahong Group (A-STOCK : 002645.SZ), renowned for its exceptional copper alloy products. Strategically located in eastern China, proximate to Shanghai.
We excel in manufacturing high-quality copper and copper alloy products includingadmiralty brass, naval brass, aluminum brass, cupronickel, and copper nickelcondenser tubes, along with efficient heat exchange tubes, large diameter copper nickel pipes, copper alloy forged flanges, oxygen-free copper products, and railway ground cables. Boasting an impressive annual capacity exceeding 30,000 tons, our products find extensive applications across seawater desalination, nuclear power, petrochemicals, marine sectors, steam turbines, pressure vessels, heat exchangers, central air-conditioning, household appliances, and railway transit, ensuring broad industry reach.
Moreover, we have authored the National Standard for copper alloy seamless tubes/pipes intended for Nuclear Power, underscoring our commitment to innovation and quality excellence!
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