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: Experience the remarkable tensile strength ranging from 620-900 MPa and yield strength of 450-750 MPa, adaptable by temper, ensuring unmatched durability.
High Conductivity: Boasting exceptional electrical conductivity of 25-34 MS/m (45-60% IACS), this material outperforms traditional bronze and brass, providing superior electrical efficiency.
Stress Relaxation Resistance: Sustain over 70% residual stress even at an elevated temperature of 200°C, ensuring long-lasting performance.
Formability: Offers outstanding cold workability with a minimum bending radius of just 2× thickness, allowing for versatile and precise fabrication.
Eco-Certified: Completely lead-free and compliant with RoHS & ELV standards, our product meets today's stringent environmental and safety requirements.
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: Perfectly suited for various stamping and bending processes, maintaining a minimum bend radius of 2× thickness.
- Welding: Achieve excellent results with TIG/MIG welding and good results with soft soldering, ensuring strong and reliable joints.
- Heat Treatment:
- Soft Annealing: Maintain temperatures between 600-700°C for 1-3 hours for optimal annealing results.
- Hot Working: Operate efficiently within the temperature range of 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: Accredited with ASTM B888, RoHS, ELV; comprehensive Mill Certificates are available for assurance.
- Testing Reports: Inclusive of mechanical properties, conductivity, and metallurgical analysis, ensuring quality and reliability.
- Customization: Tailor to your needs with non-standard sizes and surface treatments such as tin or silver plating.
Company Reference
Jiangyin Hehong Precision Technology (HHP COPPER /Jiangyin New Huahong Copper Industry Co., Ltd.) is a proud branch of Huahong Group (A-STOCK: 002645.SZ), a renowned copper alloy product manufacturer located in eastern China, conveniently near Shanghai.
We excel in producing superior copper and copper alloy products includingadmiralty brass/naval brass, aluminum brass, cupronickel/copper nickel) condenser tubes, efficient heat exchange tubes, large diameter copper nickel pipes, copper alloy forged flanges, and oxygen-free copper products. Our impressive annual production capacity exceeds 30,000 tons of premium copper products, finding applications in seawater desalination, nuclear power, petrochemical, marine, steam turbine, pressure vessels, heat exchangers, central air-conditioning, household appliances, railway transit, and more.
And we authored the National Standard for copper alloy seamless tube/pipe designated for Nuclear Power!
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