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 to 900 MPa and yield strength between 450 and 750 MPa, tailored to your specific temper requirements.
High Conductivity: Enjoy exceptional electrical conductivity of 25-34 MS/m, translating to an impressive 45-60% IACS, outperforming traditional bronze and brass.
Stress Relaxation Resistance: Withstands high temperatures, maintaining over 70% residual stress at 200°C, ensuring durability under demanding conditions.
Formability: Benefit from outstanding cold workability, with a minimal bending radius of just two times the thickness, allowing for versatile fabrication.
Eco-Certified: Proudly lead-free and fully compliant with RoHS & ELV standards, supporting sustainable and eco-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: Perfectly suited for stamping and bending operations, with a minimum bend radius of two times the thickness, ensuring flexibility in design.
- Welding: Optimal results with TIG/MIG methods, both rated excellent, and good performance with soft soldering for robust joints.
- Heat Treatment:
- Soft Annealing: Achieve optimal softness with temperatures ranging from 600 to 700°C for 1 to 3 hours.
- Hot Working: Ideal processing temperatures between 800 and 950°C, ensuring malleability and strength.
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; comprehensive mill certificates are available for peace of mind.
- Testing Reports: Detailed reports covering mechanical properties, conductivity, and metallurgical analysis provide transparency and assurance.
- Customization: Tailor your order with non-standard sizes and specialized surface treatments, including tin and silver plating, for unique applications.
Company Reference
Jiangyin Hehong Precision Technology (HHP COPPER /Jiangyin New Huahong Copper Industry Co., Ltd. ) is a prestigious entity under the renowned Huahong Group (A-STOCK: 002645.SZ), celebrated for its superior copper alloy offerings in eastern China, conveniently positioned near Shanghai.
We excel in producing an extensive range of copper and copper alloy products, includingadmiralty brass/naval brass, aluminum brass, cupronickel/copper nickelcondenser tubes, efficient heat exchange tubes, large diameter copper nickel pipes, copper alloy forged flanges, and oxygen-free copper products. Our annual production capacity exceeds 30,000 tons, catering to diverse industries such as seawater desalination, nuclear power, petrochemical, marine, steam turbine, pressure vessels, heat exchangers, central air-conditioning, household appliances, and railway transit.
Moreover, we proudly authored the National Standard for copper alloy seamless tubes/pipes designed for Nuclear Powerapplications, ensuring excellence and reliability!
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