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: Demonstrating remarkable tensile strength ranging from 620 to 900 MPa, and a yield strength between 450 and 750 MPa, our CuNi3Si alloy provides outstanding performance tailored to diverse temper requirements.
High Conductivity: Boasting exceptional electrical conductivity of 25-34 MS/m, translating to 45-60% IACS, this product surpasses the conventional bronze and brass, marking it as a superior choice for electrical applications.
Stress Relaxation Resistance: The material confidently retains over 70% residual stress even at elevated temperatures of 200°C, ensuring longevity and reliability in demanding conditions.
Formability: Offers outstanding cold workability, allowing a minimum bending radius of just 2× the material's thickness, facilitating flexible design and manufacturing.
Eco-Certified: Lead-free and compliant with RoHS & ELV regulations, reinforcing our commitment to sustainable and environmentally-friendly manufacturing practices.
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: Perfect for processes such as stamping and bending, with a recommended minimum bend radius of 2× the material thickness, enhancing manufacturing versatility.
- Welding: Excels in TIG and MIG welding methods, and offers good results with soft soldering, ensuring seamless integration into various assembly processes.
- Heat Treatment:
- Soft Annealing: Maintain the material at 600-700°C for 1-3 hours to achieve desired softness and workability.
- Hot Working: Performed at 800-950°C, perfect for shaping and forming applications requiring elevated temperatures.
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: Certified under ASTM B888, RoHS, ELV, with comprehensive Mill Certificates available for customer assurance.
- Testing Reports: Detailed reports covering mechanical properties, conductivity, and thorough metallurgical analysis are provided to guarantee product quality and performance.
- Customization: Offers customization in non-standard sizes and surface treatments, including tin and silver plating, to meet diverse customer needs.
Company Reference
Jiangyin Hehong Precision Technology (HHP COPPER /Jiangyin New Huahong Copper Industry Co., Ltd. ) operates as a prominent branch of the Huahong Group (A-STOCK : 002645.SZ), a renowned manufacturer of copper alloy products in Eastern China, strategically located near Shanghai.
We specialize in producing high-quality copper and copper alloy products, includingadmiralty brass, naval brass, aluminum brass, and cupronickel/copper nickelcondenser tubes, efficient heat exchange tubes, large diameter copper nickel pipes, copper alloy forged flanges, oxygen-free copper products, and railway ground cables. Our expansive annual production capacity exceeds 30,000 tons, catering to industries such as seawater desalination, nuclear power, petrochemical, marine, steam turbines, pressure vessels, heat exchangers, central air-conditioning, household appliances, and railway transit.
Additionally, we have authored the National Standard for copper alloy seamless tubes and pipes utilized in Nuclear Power.
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