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: Unleash the power with tensile strength ranging from 620 to 900 MPa and yield strength between 450 to 750 MPa. Adjusts with tempering for optimal performance.
High Conductivity: Experience exceptional electrical conductivity at 25-34 MS/m (45-60% IACS), showcasing superiority over standard bronze or brass.
Stress Relaxation Resistance: Exceptional resilience with over 70% residual stress retention at 200°C, optimizing long-term effectiveness.
Formability: Seamlessly adaptable with exemplary cold workability and a minimum bending radius of just 2× thickness.
Eco-Certified: Environmentally conscious, lead-free and compliant with RoHS & ELV, showcasing our commitment to sustainability.
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 precision stamping and bending with a minimum bend radius of 2× thickness, ensuring versatility.
- Welding: Recommended welding techniques include TIG/MIG for excellence and soft soldering for good performance.
- Heat Treatment:
- Soft Annealing: Precisely controlled at 600-700°C for 1-3 hours to achieve desired properties.
- Hot Working: Optimal performance achieved at temperatures between 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: Compliant with ASTM B888, RoHS, ELV standards, with Mill Certificates available for assurance.
- Testing Reports: Comprehensive testing including mechanical properties, conductivity, and metallurgical analysis to ensure quality.
- Customization: Tailored solutions 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 prestigious branch of the Huahong Group (A-STOCK: 002645.SZ), renowned for crafting copper alloy products in eastern China, strategically located near Shanghai.
We excel in the production of copper and copper alloy (admiralty brass/naval brass, aluminum brass, cupronickel/copper nickel) condenser tubes, highly efficient heat exchange tubes, large-diameter copper nickel pipes, copper alloy forged flanges, oxygen-free copper products, and railway ground cables. Our facility boasts an annual production capacity exceeding 30,000 tons. Our products serve diverse industries, including seawater desalination, nuclear power, petrochemical, marine, steam turbines, pressure vessels, heat exchangers, central air-conditioning, household appliances, and railway transit.
And we proudly authored the National Standard for copper alloy seamless tubes/pipes used in Nuclear Power!
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