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Copper Chromium Zirconium

Copper Chromium Zirconium

|Alloy Grade - CuCrZr

Material No. Unified Numbering System (UNS): C18150

Chemical Composition

Element	Cu^(1,2)	Cr	Zr
Min (%)		0.5	0.03
Max (%)	Rem	1.5	0.3

Cu + Sum of Named Elements 99.7% min.
Cu value includes Ag.

This is high conductivity heat treatable copper alloy. Heat treatment cycle consists of Solutionizing followed by ageing Process.

Common Fabrication Processes

Forging
Extruding
Drawing
Impacting
Ring Rolling
Bending
Machining

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Mechanical & Electrical Properties

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Form	Range In mm	Tensile Strength In N/MM²	Elongation In %	Rockwell Hardness in B Scale-HRB	Conductivity% IACS at 20°C
Rod	< 25	≥450	≥10	≥72	≥78
	25-50	≥370	≥12	≥72	≥78
	> 50	≥360	≥15	≥70	≥78
Flat Products	-	≥360	≥10	≥65	≥75
Tube as extruded Condition	-	-	-	≥65	≥78
Forged Block	-	-	-	≥75	≥78
Seam Welding Wheel	minØ 60 max.as per Customer Requirement	-	-	≥75	≥80
SC Ring	OD minØ 200 max. as per Customer Requirement	≥360	≥15		≥78

Physical Properties

Melting Point – Liquidus °C	1080
Melting Point – Solidus °C	1070
Density lb/cu in. at 20°C	0.321
Specific Gravity	8.89
Electrical Conductivity% IACS at 20°C	80
Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 20°C	187
Coefficient of Thermal Expansion 20-100 10⁻⁶ per °C (20 – 100°C)	9.5
Modulus of Elasticity in Tension ksi	17000

Typical Applications

Electrical

Electrical Connectors in Transformer Applications
Electrical Contacts in MV/HV Switch Gear Application
Short Circuit Ring and Rotor Bars in Traction & Industrial Motor Applications
Rotor Current Carrying Rod for MV & HV Turbo Generators
Electron Tube Grid Side Rods
Parts for Electronic Devices
Semi-Conductor Industry

Industrial

Resistance Welding Machine Electrodes
Seam Welding Wheels in Automobile Industry
Mould plates for casting in steel & Brass melting Industry

Applicable Form & Size

Form	Size
Rod	Dia: Ø6 mm-Ø50mm Length: 2 Mtr. max Dia: Ø51 mm-Ø100mm Length: 1 Mtr max Dia: Ø101 mm-Ø145mm Length: 0.5 Mtr max
Flat	Thick: 5 mm-60 mm Width: 20 mm-150 mm Length: 2 Mtr max
Profile	Circumscribing circle of Dia 30 to 150 mm
Wheel	Dia: Ø400 mm max Thick: 6 mm – 50 mm
Tube as extruded Condition	ID: Ø45 mm- Ø117mm OD: Ø85 mm- Ø150mm
Forged Block	Thick: 170 mm max Width: 320 mm max Length: 600 mm max
Short Circuit Ring	OD: Ø270 – Ø830 mm ID: Ø160 – Ø700 mm Thick: 17mm to 90mm
Apart from above we can also manufacture as per customer specification.