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Different profiles and semi finished products
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Pieces cut from plate
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Forged round bar
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Material designation SCHMELZMETALL
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HOVADUR® CCNB
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Material designation, EN standard
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CuCo1Ni1Be
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Material No., EN standard
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CW103C
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Material No., former DIN standard
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None. Comparable to 2.1285 (CuCo2Be)
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Material No., UNS system (ASTM)
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None. Comparable to C17500 (CuCo2Be)
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Classification RWMA (USA)
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Class 3
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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)
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ASTM
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(B441, B534)
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Description of material
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HOVADUR® CCNB is a thermally precipitation hardenable copper alloy. In heat treated condition, the alloy combines
high hardness and high resistance to heat with good electrical and thermal conductivity.
The technological properties are improved by replacing part of the cobalt according to former DIN standard CuCo2Be
(2.1285) by nickel.
We also produce the alloy HOVADUR® CCNB eh, which is based on the same chemical composition as HOVADUR®
CCNB. Its even higher quality is due to vacuum technology and special processes.
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Safety data sheet
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SCHMELZMETALL No. 07.02E (Issue 30.07.2002)
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Material properties
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Chemical composition in % of weight (guaranteed ranges)
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Co
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Ni
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Be
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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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0.8-1.3
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0.8-1.3
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0.4-0.7
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max. 0.2
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max. 0.2
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0.5
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Remainder
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Agreed properties at 20 °C (Condition: hardened, solution heat treated respectively)
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Condition
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hardened
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solution heat treated
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Hardness Brinell HB
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min. 220 *)
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max. 110 *)
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Electrical conductivity
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MS/m
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min. 25
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max. 13
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Electrical conductivity
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% IACS
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min. 43.0
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max. 22.5
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| *) In case of different opinions, hardness is calculated as the average of 3 randomly located measurings. |
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Associated properties at 20 °C (Condition: hardened, solution heat treated respectively)
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Condition
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hardened
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solution heat treated
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Tensile strength
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1)
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N/mm² (MPa)
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min. 680
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max. 500
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0.2% yield strength
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1)
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N/mm² (MPa)
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min. 550
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max. 400
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Elongation (A5)
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1)
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%
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min. 8
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min. 25
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| 1) 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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135,000
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Softening temperature
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°C
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480
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Specific weight
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g/cm³
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8.85
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Thermal conductivity
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W/mK
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230-250
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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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17.2
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(Average 20 °C-300 °C)
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Melting interval
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°C
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1000-1030
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Processing instructions
Hot forming
HOVADUR® CCNB is suitable for hot forming at temperatures of about 900–700 °C. After forming, quick cooling in water
is recommended.
Advice: After a hot forming executed by the customer, the properties of HOVADUR® CCNB will normally no
longer be achieved.
Cold forming
HOVADUR® CCNB in hardened condition is not intended for cold forming. In case, a cold forming has to be executed,
HOVADUR® CCNB 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, 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: 920–970 °C, about 30 minutes followed by quenching in water
Hardening: 460–520 °C, 2–5 h followed by cooling at the air
Machining
HOVADUR® CCNB 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® CCNB 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. HOVADUR® CCNB is suited for welding. Attention must be paid to sufficient extraction and filtering of
welding fume.
Application examples
Electrodes, holders, shafts for spot, seam, butt and projection welding of (preferably) materials of higher strength and
greater electrical resistance (e.g. stainless and heat-resistant steels), welded wire mesh.
Moulds for non-ferrous metal casting, inserts in steel moulds at spots requiring a faster cooling speed.
Die casting pistons for horizontal cold chamber casting machines for light metal casting.
Thermally highly strained parts susceptible to fire cracks.
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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Product data sheet