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: Boasting remarkable tensile strength ranging from 620 to 900 MPa and yield strength between 450 and 750 MPa, this outstanding material adapts to varied temper specifications, ensuring robust performance under pressure.
High Conductivity: This copper alloy shines in electrical conductivity, offering 25-34 MS/m or an impressive 45-60% IACS. It's a stellar choice outshining traditional bronze and brass solutions.
Stress Relaxation Resistance: Even at soaring temperatures of up to 200°C, this innovative alloy maintains over 70% residual stress, providing exceptional reliability.
Formability: With its excellent cold workability and a minimal bending radius of 2× thickness, it offers unparalleled versatility for complex applications.
Eco-Certified: Environmentally responsible by being lead-free and compliant with both RoHS and ELV standards, this copper alloy meets global eco-friendly certifications.
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 precise stamping and bending with a minimum bend radius equal to twice the material's thickness.
- Welding: Exceptional compatibility with TIG/MIG welding methods, while also supporting good results with soft soldering techniques.
- Heat Treatment:
- Soft Annealing: Maintain temperature between 600-700°C for 1-3 hours for ideal annealing conditions.
- Hot Working: Optimal results achieved 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: Fully certified under ASTM B888, as well as RoHS and ELV standards; Mill Certificates provided for assurance.
- Testing Reports: Comprehensive reports available covering mechanical properties, conductivity, and detailed metallurgical analysis.
- Customization: We offer customization to meet your specific needs, including non-standard sizes and specialized surface treatments like tin or silver plating.
Company Reference
Jiangyin Hehong Precision Technology (HHP COPPER /Jiangyin New Huahong Copper Industry Co., Ltd.) stands as a proud branch of the prestigious Huahong Group (A-STOCK: 002645.SZ), a renowned manufacturer in eastern China, strategically located near Shanghai.
We specialize in the production of copper and a wide array of copper alloys (including admiralty brass, naval brass, aluminum brass, and cupronickel/copper nickel) offering condenser tubes, efficient heat exchange tubes, large diameter copper nickel pipes, copper alloy forged flanges, oxygen-free copper products, and railway ground cables. Our production capacity exceeds 30,000 tons annually. Our products are utilized across various industries such as seawater desalination, nuclear power, petrochemicals, marine applications, steam turbines, pressure vessels, heat exchangers, central air-conditioning, household appliances, and railway transit, among others.
Additionally, we have authored the National Standard for copper alloy seamless tubes and pipes used in the Nuclear Power industry.
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