C70250 Copper Alloy NF A51-121 CuNi3si High Temperature ASTM B888

Product Details
Customization: Available
Application: Relays/Switches
certification: ASTM B888
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Number of Employees
355
Year of Establishment
2002-03-07
  • C70250 Copper Alloy NF A51-121 CuNi3si High Temperature ASTM B888
  • C70250 Copper Alloy NF A51-121 CuNi3si High Temperature ASTM B888
  • C70250 Copper Alloy NF A51-121 CuNi3si High Temperature ASTM B888
  • C70250 Copper Alloy NF A51-121 CuNi3si High Temperature ASTM B888
  • C70250 Copper Alloy NF A51-121 CuNi3si High Temperature ASTM B888
  • C70250 Copper Alloy NF A51-121 CuNi3si High Temperature ASTM B888
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Basic Info.

Model NO.
C70250
Temperature Classification
High Temperature Piping
MPa Classfication
Ultra High Pressure Piping
Material
Copper Alloy
Standard
ASTM, GB, API, DIN, JIS, BS
Medium
Liquid
Cross-Section Shape
Round
Connection Type
Seamless
Diameter
419mm
Transport Package
Wooden Case
Specification
1.2m*1.2m*L
Trademark
Hehong
Origin
China
Production Capacity
600ton/Month

Packaging & Delivery

Package Size
80.00cm * 80.00cm * 80.00cm
Package Gross Weight
1.000kg

Product Description

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

Remarkable Strength: Exhibits impressive tensile strength ranging from 620-900 MPa and a yield strength of 450-750 MPa, depending on the temper, making it ideal for demanding applications.
Exceptional Conductivity: Boasting electrical conductivity between 25-34 MS/m, equivalent to 45-60% IACS, this alloy surpasses standard bronze and brass options.
Stress Relaxation Resistance: Retains over 70% of its residual stress even at elevated temperatures of 200°C, ensuring long-term performance stability.
Outstanding Formability: Features excellent cold workability, allowing for a minimum bending radius of 2× the material thickness.
Eco-Certified: Complies fully with RoHS & ELV regulations, being a lead-free choice for environmentally conscious applications.

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: Optimal for stamping and bending processes with a minimum bend radius of 2× the material thickness.
  • Welding: Recommended welding techniques include TIG and MIG, which offer excellent results, while soft soldering provides good adherence.
  • Heat Treatment:
    • Soft Annealing: Conduct at 600-700°C for 1-3 hours to achieve desired softness.
    • Hot Working: Perform at temperatures between 800-950°C to maintain structural integrity.
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 standards. Comprehensive Mill Certificates are provided with each batch.
  • Testing Reports: Detailed reports available, covering mechanical properties, conductivity, and metallurgical analysis.
  • Customization: Offers non-standard sizes and specialized surface treatments, such as tin or silver plating, tailored to your specific needs.


Company Reference
C70250 Copper Alloy NF A51-121 CuNi3si High Temperature ASTM B888
C70250 Copper Alloy NF A51-121 CuNi3si High Temperature ASTM B888


 
C70250 Copper Alloy NF A51-121 CuNi3si High Temperature ASTM B888
Jiangyin Hehong Precision Technology (HHP COPPER /Jiangyin New Huahong Copper Industry Co., Ltd.) operates as a pivotal branch of the esteemed Huahong Group (A-STOCK: 002645.SZ), renowned for its high-quality Copper Alloy products. Situated in eastern China, close to the bustling city of Shanghai.


We specialize in producing 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. With an impressive annual production capacity exceeding 30,000 tons, our products find applications across a wide spectrum of 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 authored the National Standard for copper alloy seamless tubes/pipes dedicated to Nuclear Power, solidifying our position as industry leaders.

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