Discover the impressive Product Details for CuNi3Si1Mg (C70250), a high-performance solution for ultra-high-pressure piping applications.
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: Enjoy remarkable tensile strength ranging from 620 to 900 MPa and a yield strength of 450 to 750 MPa, tailored by temper.
High Conductivity: Benefit from electrical conductivity between 25-34 MS/m, translating to a superior 45-60% IACS, outshining typical bronze and brass.
Stress Relaxation Resistance: Retains over 70% residual stress at 200°C, ensuring reliable performance under extreme conditions.
Formability: Experience superb cold workability with a minimum bending radius of just 2× thickness, facilitating versatile manufacturing processes.
Eco-Certified: Environmentally friendly and lead-free, complying with RoHS & ELV standards to meet your sustainable product needs.
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 precision stamping and bending, with a minimal bend radius of 2× thickness.
- Welding: Embrace effective joining methods with TIG/MIG welding (excellent compatibility) and soft soldering (good compatibility).
- Heat Treatment:
- Undergo Soft Annealing at 600-700°C for 1-3 hours to enhance material properties.
- Engage in Hot Working at temperatures between 800-950°C to shape and mold the alloy efficiently.
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, RoHS, and ELV; Mill Certificates provided for assured quality.
- Testing Reports: Comprehensive assessments of mechanical properties, conductivity, and metallurgical composition.
- Customization: Offering bespoke sizes and specialized surface treatments, including tin and silver plating.
Company Reference
Jiangyin Hehong Precision Technology (HHP COPPER /Jiangyin New Huahong Copper Industry Co., Ltd.) operates as a vital branch of Huahong Group (A-STOCK: 002645.SZ), an esteemed copper alloy manufacturer located in eastern China, in proximity to Shanghai.
We excel in producing a wide range of copper and copper alloy products, includingadmiralty brass, naval brass, aluminum brass, and cupronickel/copper nickelcondenser tubes, efficient heat exchange tubes, expansive diameter copper nickel pipes, forged copper alloy flanges, oxygen-free copper products, and railway ground cables. This has established an annual production capacity exceeding 30,000 tons. Our products 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, among others.
Furthermore, we played a pivotal role in drafting the National Standard for copper alloy seamless tubes/pipes utilized in Nuclear Powerapplications!
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