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: Embrace the robust power of tensile strength ranging from 620-900 MPa, while the yield strength delivers between 450-750 MPa, depending on the temper. This ensures top-tier performance in demanding applications.
High Conductivity: Offers remarkable electrical conductivity ranging from 25-34 MS/m, translating to 45-60% IACS, surpassing conventional bronze and brass. Experience enhanced efficiency and reliability.
Stress Relaxation Resistance: Ensures remarkable durability by maintaining over 70% residual stress even at high temperatures of 200°C, ideal for long-term performance stability.
Formability: With superior cold workability, a minimum bending radius of 2× thickness is effortlessly achieved, catering to complex design needs with ease.
Eco-Certified: Lead-free and rigorously compliant with RoHS & ELV standards, promoting a sustainable and environmentally friendly footprint.
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 procedures, with a minimum bend radius maintained at 2× thickness, ensuring flawless execution.
- Welding: Endorsed welding methods include TIG/MIG for excellence, and soft soldering for good results, ensuring versatile application possibilities.
- Heat Treatment:
- Soft Annealing: Sustain the optimal qualities of your product with soft annealing at 600-700°C for a duration of 1-3 hours.
- Hot Working: Achieve peak performance through hot working at temperatures between 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: Certified with ASTM B888, RoHS, and ELV standards. Mill certificates are readily accessible to support product validation.
- Testing Reports: Comprehensive testing reports available for mechanical properties, conductivity, and metallurgical analysis, ensuring quality and trust.
- Customization: Tailor to your specific needs with non-standard sizes and various surface treatments such as tin or silver plating.
Company Reference
Jiangyin Hehong Precision Technology (HHP COPPER /Jiangyin New Huahong Copper Industry Co., Ltd.) serves as a proud branch of the esteemed Huahong Group (A-STOCK : 002645.SZ), a well-renowned Copper Alloy products manufacturer located in eastern China, near Shanghai.
Specializing in the production of copper and copper alloy products such asadmiralty brass/naval brass, aluminum brass, cupronickel/copper nickel) condenser tubes, efficient heat exchange tubes, large diameter copper nickel pipes, copper alloy forged flanges, oxygen-free copper products, and railway ground cables. Our operations boast an impressive annual production capacity exceeding 30,000 tons of copper products. These products find extensive application in numerous industries, including seawater desalination, nuclear power, petrochemical, marine, steam turbine, pressure vessels, heat exchangers, central air-conditioning, household appliances, and railway transit.
Moreover, we have proudly authored the National Standard for copper alloy seamless tube/pipe in Nuclear Power applications,setting new benchmarks in industry standards!
){kind=link}