Exquisite Product Insights 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
Unmatched High Strength: Demonstrating impressive tensile strength ranging from 620-900 MPa and a yield strength of 450-750 MPa, depending on the temper, this product stands strong under pressure.
Exceptional High Conductivity: Boasting an electrical conductivity of 25-34 MS/m (45-60% IACS), this product outshines standard bronze and brass, making it a superior choice for high-performance applications.
Outstanding Stress Relaxation Resistance: Remarkably, it maintains over 70% residual stress even when exposed to temperatures up to 200°C, ensuring long-term durability.
Superior Formability: This product offers excellent cold workability with a minimum bending radius of just 2× its thickness, allowing for flexible and efficient manufacturing.
Eco-Certified for Environment: Fully lead-free and compliant with RoHS & ELV, this product is an environmentally conscious choice for modern industries.
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: Ideally suited for stamping and bending processes with a minimal bend radius of 2× thickness, ensuring high adaptability.
- Advanced Welding Techniques: Recommended welding methods include TIG/MIG for excellent results and soft soldering for good outcomes, ensuring robust joint integrity.
- Optimized Heat Treatment:
- Soft Annealing: Conducted at 600-700°C for 1-3 hours, this method refines product properties for specific applications.
- Hot Working: Performed at 800-950°C, this process enhances the material's performance under high-temperature conditions.
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
- Comprehensive Certifications: Includes ASTM B888, RoHS, ELV; Mill Certificates are provided to verify quality and compliance.
- Thorough Testing Reports: Detailed reports on mechanical properties, electrical conductivity, and metallurgical analysis ensure transparency and reliability.
- Versatile Customization Options: Offering non-standard sizes and a variety of surface treatments like tin and silver plating, we cater to diverse customer needs.
Prestigious Company Reference
Jiangyin Hehong Precision Technology Technology (HHP COPPER /Jiangyin New Huahong Copper Industry Co., Ltd.) proudly represents a segment of Huahong Group (A-STOCK : 002645.SZ), a renowned leader in copper alloy products in eastern China, just a stone's throw from Shanghai.
We excel in crafting an array of copper and copper alloy products, includingadmiralty brass/naval brass, aluminum brass, and cupronickel/copper nickel) condenser tubes, efficient heat exchange tubes, large diameter copper nickel pipes, copper alloy forged flanges, oxygen-free copper products, and robust railway ground cables. With an astonishing annual output of over 30,000 tons of copper products, our offerings are integral to industries such as seawater desalination, nuclear power, petrochemical, marine, steam turbine, pressure vessels, heat exchangers, central air-conditioning, household appliances, and railway transit.
Additionally, we contributed to the drafting of the National Standard for copper alloy seamless tubes/pipes utilized in Nuclear Powerapplications!
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