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Forged bars
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Discs
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Forged plates
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Hot formed bars and plates (hardened)
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Material designation SCHMELZMETALL
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HOVADUR® CCZ
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Material designation, EN standard
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CuCr1Zr
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Material No., EN standard
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CW106C
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Material No., former DIN standard
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2.1293 (CuCrZr)
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Material No., UNS system (ASTM)
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C18400
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Classification RWMA (USA)
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Class 2
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Information about standards
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EN
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EN12163 (Round bars), EN12167 (Flat bars, profiles), EN12420 (Forged products)
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DIN (former)
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(DIN17666/DIN17672/DIN17678)
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ASTM
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-
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Description of material
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HOVADUR® CCZ is a thermally precipitation hardenable copper alloy. In heat treated condition, the alloy is characterized
by especially high electrical and thermal conductivity with sufficient hardness and good resistance to softening.
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Material properties
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Chemical composition in % of weight (guaranteed ranges)
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Cr
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Zr
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Fe
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Si
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others total
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Cu
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0.5-1.2
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0.03-0.3
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max. 0.08
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0.1
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max. 0.2
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Remainder
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Agreed properties at 20 °C (Condition: hardened)
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Round bars, diametre (mm)
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> 65 to 100
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> 100 to 180
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> 180 to 400
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Plates, thickness (mm)
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-
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> 20 bis 100
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> 100 to 300
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Hardness Brinell HB
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min. 125 *)
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min. 120 *)
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min. 115 *)
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Electrical conductivity
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min. 44 MS/m (min. 75.8% IACS)
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*) In case of different opinions, hardness is calculated as the average of 3 randomly located measurings (section).
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Associated properties at 20 °C (Condition: hardened) +)
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Tensile strength N/mm²
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min. 370
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min. 360
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min. 350
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0.2% yield strength N/mm²
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min. 270
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min. 260
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min. 250
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Elongation (A5) %
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min. 15
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min. 16
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min. 18
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| +) Strength values will only be proved if ordered by the customer. |
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Material information (nominal values)
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Elastic modulus
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N/mm² (MPa)
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125,000
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Softening temperature
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°C
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500
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Specific weight
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g/cm³
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8.9
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Thermal conductivity
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W/mK
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310-340
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(Average 20 °C-300 °C)
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Thermal expansion coefficient
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x 10-6/°K
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17.0
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(Average 20 °C-300 °C)
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Melting interval
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°C
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1075-1085
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Processing instructions
Hot forming
HOVADUR® CCZ is very well suitable for hot forming at temperatures of about 950–700 °C. After forming, quick cooling in water is recommended.
Advice: After a hot forming executed by the customer, the properties of HOVADUR® CCZ will normally no longer be achieved, as they depend on the installation and processes which are used.
Cold forming
HOVADUR® CCZ in hardened condition is suitable for cold forming only to a limited extent. You have to take into account that cold forming may result in unfavourable surface quality (“orange peel”).
In case, a more important cold forming has to be executed, HOVADUR® CCZ in solution heat treated condition has to be used. After forming, as a rule, the part has to be heat treated.
Heat treatment
A heat treatment changes the agreed properties. If a heat treatment is executed after supply of the material by SCHMELZMETALL, we cannot guarantee any properties.
Advice for heat treatments (they always depend to a large degree on the kind and the function of the furnace)
Solution heat treatment: 950–990 °C, about 30 minutes followed by quenching in water
Hardening: 450–500 °C, 2–5 h followed by cooling at the air
Machining
HOVADUR® CCZ is very suitable for machining. We recommend hard metal cutting tools with positive cutting geometry.
For drilling, attention must be paid to good removal of chips. Cooling with emulsion is recommended. In case of dry machining, this has to be done with strong suction. Outgoing air has to be cleaned by a particle filter.
Thread moulding is possible to a limited extent. Bigger inside threads should be executed by circular thread milling.
Joining
HOVADUR® CCZ is suitable for soft as well as hard soldering. Concerning hard soldering (even at limited time of effect of the temperature), a loss in hardness in the area of heating is to be expected. A very low melting silver brazing should be used and the brazing process itself should be as short as possible. HOVADUR® CCZ is suited for welding. Attention must be paid to sufficient extraction and filtering of welding fume.
Application examples
Electrodes, holders, shafts for spot and seam welding of mainly plain steel. Clamping jaws, inserts for butt welding.
Live parts for electrical engineering.
Moulds and cooling inserts for continuous metal cast, covers for centrifugal casting moulds for gray cast iron.
Documents:
| Details of the properties or application of materials are for descriptive purposes only. Confirmation of suitability with regard to specific properties or application require written agreement. |
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Material data sheet