C18000 Cunisicr Beryllium Free Copper Bars for Pinch Offs

Product Description

Product Description

C18000(CuNiSiCr) NICKEL SILICON CHROMIUM COPPER ALLOY INTRODUCTION:

C18000, also known as Nickel Silicon Chromium Copper (CuNiSiCr), is a high-strength copper alloy specifically engineered to provide an optimal balance between mechanical properties, wear resistance, and electrical/thermal conductivity. Classified as a precipitation-hardened copper alloy, it achieves its enhanced performance from the combination of nickel, silicon, and chromium additions, which together form finely dispersed strengthening precipitates within the copper matrix.

Unlike pure copper, which offers excellent conductivity but poor strength, or beryllium copper, which offers high strength but raises health and safety concerns, C18000 presents a safe and versatile alternative. This alloy is widely used in resistance welding, aerospace, automotive, marine, and electrical industries, where components must endure heavy mechanical loads and thermal stresses without compromising conductivity.

C18000 Nickel Silicon Chromium Copper is a high-performance, beryllium-free copper alloy that successfully combines moderate-to-high strength, wear resistance, and good electrical/thermal conductivity. The synergistic effect of nickel, silicon, and chromium produces an alloy that excels in resistance welding, aerospace, automotive, marine, electrical, and mold industries, where durability and conductivity are equally important.

Compared with C18150, which offers higher conductivity, C18000 provides slightly greater strength and wear resistance, making it ideal for demanding environments that involve both mechanical load and electrical transfer. Furthermore, its safety advantages over beryllium copper have made it increasingly attractive in modern manufacturing.

As industries continue to push for safer, more efficient, and more durable materials, C18000 stands out as a versatile solution, ensuring reliability in applications where performance cannot be compromised.

CHEMICAL COMPOSITIONS(%)

Ni	Si	Cr				Cu
1.8-2.5	0.2-0.8	0.5-1.2				Remainder

KEY CHARACTERISTICS

Mechanical Properties	Tensile Strength: ~ 450 – 700 MPa (depending on temper and processing) Yield Strength: ~ 350 – 600 MPa Hardness: ~ 140 – 200 HV (can be higher after cold working and aging) Good Wear and Fatigue Resistance: Allows long-term performance in high-load and cyclic applications Maintains structural integrity under prolonged stress
Electrical and Thermal Conductivity	Electrical Conductivity: ~ 45 – 60% IACS, higher than most high-strength alloys, though lower than C18150 Thermal Conductivity: High, enabling efficient heat dissipation in welding and power transfer applications Stable conductivity after prolonged service at elevated temperatures
High-Temperature Performance	C18000 retains its strength and hardness better than many standard copper alloys when subjected to elevated temperatures. This makes it highly suitable for resistance welding electrodes and high-load electrical contacts, where both conductivity and heat resistance are critical.
Processing and Workability	Can be machined, hot worked, and cold worked before aging treatments Exhibits good machinability compared with higher-strength alloys like beryllium copper Amenable to joining methods such as brazing and welding, though electrode service parts are generally manufactured through machining Can be surface-coated (e.g., nickel or chromium plating) to extend service life in harsh environment
Stress Relaxation Resistance	C18000 shows excellent stress relaxation properties, meaning that springs, connectors, and contact parts retain their force and electrical contact reliability over time, even under elevated service conditions.

TYPICAL APPLICATIONS

Resistance Welding	Electrodes for spot welding and seam welding Holders, shanks, and adaptors in welding equipment Provides longer service life than pure copper due to its higher strength and wear resistance Ensures consistent current flow and reduced heat loss at electrode contact points
Aerospace Industry	High-performance connectors and terminals in aircraft systems Components exposed to thermal cycling and high electrical currents Parts in propulsion systems and turbine components requiring conductivity and oxidation resistance
Automotive industry	Resistance welding electrodes for automotive body assembly Electrical connectors and terminals in hybrid and electric vehicles (EVs) Components for battery management systems requiring both conductivity and durability
Marine Industry	Corrosion-resistant components in shipbuilding and offshore equipment Electrical contacts and connectors exposed to saltwater environments Heat exchangers and cooling elements where both conductivity and corrosion resistance are essential
Electrical and Power Generation	Switchgear components and busbars Electrical connectors requiring long service life under repeated current cycles Terminals and contacts in power plants and renewable energy systems (e.g., wind turbines, solar power inverters)
Industrial Equipment	Non-magnetic parts in precision instruments Bearings and bushings where mechanical wear resistance is critical Heat-dissipating components in heavy-duty machinery
Medical Devices	High-reliability connectors and switches in diagnostic and imaging systems Components requiring spark resistance, conductivity, and durability in sensitive environments

PRODUCT IMAGES AND FACILITIES

Company Profile

Rich Base Technology Co., Limited
Your Trusted Partner in Copper Alloy Materials!
Founded in 2007, Rich Base Technology Co., Limited is one of the leading manufacturers of copper alloy materials in China. With a management team bringing over 20 years of industry expertise, we deliver high-quality, cost-effective copper alloys to customers worldwide.
 
Our Products
We supply a wide range of copper alloys, including:
Nickel-Beryllium Copper (C17510)
Cobalt-Beryllium Copper (C17500)
Beryllium Copper (C17200, C17300)
Zirconium Copper (C15000, C15100)
Aluminum Bronzes (C95810, C6191)
Chromium-Zirconium Copper (C18150)
Chromium Copper (C18200)
Nickel-Silicon-Chromium Copper (C18000)
Zirconium Copper (C15000, C15100)
Aluminum Bronzes (C95810, C6191)
Available Forms: round bars, square bars, rectangular bars, hexagonal bars, plates, sheets, and customized precision-machined parts, as well as molds based on our materials.
 
Why Choose Us:
1)20+ years of copper alloy manufacturing expertise
2)Complete production facilities — from raw materials to finished products
3)High quality at competitive prices
4)Quick deliveries and responsive service
5)Trusted by global brands
Applications
Our copper alloys are widely used in:
1)Automotive
2)Aerospace & Aircraft
3)Consumer Electronics & Appliances
4)Industrial Machinery & Machine Tools
5)Electrical & Electronic Equipment
6)Resistance Welding
7)Telecommunications
8)Transportation (including high-speed trains)
Trusted Worldwide
Our products are exported across Europe, North America, Northeast Asia, Southeast Asia, and beyond. They are used by leading companies such as Volkswagen, Toyota, Honda, Ford, GM, and major high-speed train manufacturers.
At Rich Base Technology, quality is our priority. Every product undergoes rigorous testing and inspection to ensure it meets customers' requirements before delivery.
 
Rich Base Technology Co., Limited
High-quality copper alloys. Competitive prices. Reliable service.