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Nozzles
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Cooling ring
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Welding bar
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Material designation SCHMELZMETALL
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HOVADUR® CB2
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Material designation, EN standard
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CuBe2
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Material No., EN standard
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CW101C
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Material No., former DIN standard
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2.1247
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Material No., UNS system (ASTM)
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C17200
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Classification RWMA (USA)
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Class 4
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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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(B196/B570)
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Description of material
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HOVADUR® CB2 is a thermally precipitation hardenable copper alloy. In heat treated condition, the alloy shows extraordinary
high hardness and strength combined with good values for electrical and thermal conductivity. Good resistance
to corrosion (against seawater even excellent), high wear resistance and high resistance against seizing, good polishing
properties and absence of sparkling complete the excellent range of properties of this alloy.
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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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Be
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Co
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Ni
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Co + Ni
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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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1.8-2.0
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0-0.3
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0-0.3
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0.2-0.5
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max. 0.1
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max. 0.1
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max. 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. 350 *)
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max. 125 *)
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Electrical conductivity
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MS/m
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min. 16
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max. 12
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Electrical conductivity
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% IACS
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min. 27.6
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max. 20.7
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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. 1150
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max. 600
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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. 1000
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max. 350
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Elongation (A5)
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1)
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%
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min. 3
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min. 35
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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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300
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Specific weight
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g/cm³
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8.3
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Thermal conductivity
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W/mK
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160
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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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870-970
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Processing instructions
Hot forming
HOVADUR® CB2 is suitable for hot forming at temperatures of about 800–650 °C. After forming, quick cooling in water is
recommended.
Advice: After a hot forming executed by the customer, the properties of HOVADUR® CB2 will normally no longer
be achieved.
Cold forming
HOVADUR® CB2 in hardened condition is not intended for cold forming. In case, a cold forming has to be executed,
HOVADUR® CB2 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: 760–800 °C, about 30 minutes followed by quenching in water
Hardening: 310–340 °C, 2–5 h followed by cooling at the air
Machining
HOVADUR® CB2 is 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.
In case of more important machining work, we recommend pre-machining in solution heat treated condition.
Bigger inside threads should be executed by circular thread milling.
Joining
HOVADUR® CB2 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® CB2 is suited for welding. Attention
must be paid to sufficient extraction and filtering of welding fume.
Application examples
Mechanically highly strained jaws, holders and guide rails for flash butt welding and projection welding. Die casting
pistons for horizontal cold chamber casting machines for light metal casting. High-stength and corrosion-resistant parts
for marine applications.
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