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: This alloy marvel boasts a tensile strength spanning from 620 to 900 MPa, and a yield strength between 450 and 750 MPa, tailored by temper.
High Conductivity: With an impressive electrical conductivity range of 25-34 MS/m (equivalent to 45-60% IACS), this material outshines standard bronze and brass with ease.
Stress Relaxation Resistance: Excelling in maintaining over 70% residual stress at 200°C, this material stands up to the heat.
Formability: Remarkably adaptable with superior cold workability, offering a minimum bending radius as tight as 2× the thickness.
Eco-Certified: Proudly lead-free, this product adheres to RoHS & ELV standards, ensuring an eco-friendly choice.
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 tasks, with a minimum bend radius of 2× thickness, ensuring precision and quality.
- Welding: The go-to methods include TIG/MIG for exceptional outcomes and soft soldering for good results.
- Heat Treatment:
- Soft Annealing: Achieve optimal softness through heating at 600-700°C for 1 to 3 hours.
- Hot Working: Engaging this process between 800-950°C ensures the material's integrity and form.
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: Proudly conforming to ASTM B888, RoHS, ELV standards, with Mill Certificates ready upon request.
- Testing Reports: Comprehensive documentation covering mechanical properties, conductivity, and metallurgical analysis for your assurance.
- Customization: Offering tailor-made solutions with non-standard sizes and surface treatments like tin and silver plating to meet unique needs.
Company Reference
Jiangyin Hehong Precision Technology (HHP COPPER /Jiangyin New Huahong Copper Industry Co., Ltd.) stands as a prestigious branch of Huahong Group (A-STOCK: 002645.SZ), renowned in eastern China, near the bustling metropolis of Shanghai, for its excellence in copper alloy products.
We proudly specialize in the production of copper and copper alloy products such asadmiralty brass, naval brass, aluminum brass, cupronickel, and copper nickelcondenser 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, with applications spanning seawater desalination, nuclear power, petrochemical industries, marine applications, steam turbines, pressure vessels, heat exchangers, central air-conditioning, household appliances, and railway transit.
Moreover, we were instrumental in drafting the National Standard for copper alloy seamless tubes and pipes designed for Nuclear Power!
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