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 unparalleled durability with a tensile strength ranging from 620 to 900 MPa and a yield strength between 450 and 750 MPa, adjusted by tempering processes.
High Conductivity: Boasting an impressive electrical conductivity between 25-34 MS/m (or 45-60% IACS), this product outshines standard bronze and brass, ensuring efficient performance.
Stress Relaxation Resistance: Remarkably maintains over 70% residual stress even at elevated temperatures of 200°C, showcasing its reliability under heat.
Formability: Offers outstanding cold workability with a minimum bending radius of 2× the material's thickness, facilitating versatile applications.
Eco-Certified: Environmentally friendly and lead-free, fully compliant with RoHS & ELV standards, supporting sustainable 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: Ideal for stamping and bending applications, accommodating a minimum bend radius of 2× the material's thickness.
- Welding: Recommended welding methods include TIG/MIG for excellent results and soft soldering for good performance.
- Heat Treatment:
- Soft Annealing: Achieve optimal softness with annealing at 600-700°C for 1-3 hours.
- Hot Working: Best performed at 800-950°C to ensure robustness.
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 to ASTM B888, RoHS, and ELV standards, with Mill Certificates available upon request.
- Testing Reports: Detailed reports covering mechanical properties, electrical conductivity, and metallurgical analysis for assured quality.
- Customization: Offers non-standard sizes and various surface treatments, including tin and silver plating, tailored to specific needs.
Company Reference
Jiangyin Hehong Precision Technology (HHP COPPER /Jiangyin New Huahong Copper Industry Co., Ltd.) is a prominent branch of the esteemed Huahong Group (A-STOCK: 002645.SZ), a distinguished manufacturer of Copper Alloy products, strategically located in eastern China, near the bustling city of Shanghai.
We specialize in the production of diverse 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, oxygen-free copper products, and railway ground cables. Our extensive annual production capacity exceeds 30,000 tons of copper products. These products find widespread use in seawater desalination, nuclear power, petrochemical industries, marine applications, steam turbines, pressure vessels, heat exchangers, central air-conditioning systems, household appliances, and railway transit, among others.
Furthermore, we contributed significantly to authoring the National Standard for copper alloy seamless tubes/pipes utilized in Nuclear Powerindustries! Truly a testament to our expertise and commitment to quality.
){kind=link}