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: Experience the impressive tensile strength range of 620 to 900 MPa, complemented by a yield strength of 450 to 750 MPa, contingent on temper.
High Conductivity: Revel in electrical conductivity ranging between 25 to 34 MS/m (45-60% IACS), significantly outclassing standard bronze and brass.
Stress Relaxation Resistance: Exceptional resilience, maintaining over 70% residual stress even at 200°C.
Formability: Enjoy superior cold workability with a minimal bending radius of just 2 times the thickness.
Eco-Certified: Fully lead-free and compliant with RoHS & ELV directives, ensuring eco-friendly operations.
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 applications with a minimum bend radius of 2 times the thickness.
- Welding: Ideal welding methods include TIG/MIG (excellent) and soft soldering (good).
- Heat Treatment:
- Soft Annealing: A gentle process at 600-700°C for 1-3 hours.
- Hot Working: Conduct operations flawlessly at temperatures 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: Accredited by ASTM B888, RoHS, and ELV; Mill Certificates are readily available.
- Testing Reports: Comprehensive reports covering mechanical properties, conductivity, and metallurgical analysis.
- Customization: Tailor your needs with 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.) is a distinguished branch of the Huahong Group (stock ticker: 002645.SZ), renowned for manufacturing advanced Copper Alloy products in eastern China, conveniently located near Shanghai.
We excel in the production of copper and copper alloy (admiralty brass/naval brass, aluminum brass, cupronickel/copper nickel) condenser tubes, efficient heat exchange tubes, large diameter copper nickel pipes, copper alloy forged flanges, and oxygen-free copper products. Our annual production capacity exceeds 30,000 tons, catering to diverse industries such as seawater desalination, nuclear power, petrochemical, marine, steam turbine, pressure vessels, heat exchangers, central air-conditioning, household appliances, and railway transit.
And we proudly contributed to the drafting of the National Standard for copper alloy seamless tubes and pipes in Nuclear Power!
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