Profiles made of CCNB eh | 
Discs made of CCNB eh | 
Forged plates made of CCNB eh |
Material designation SCHMELZMETALL
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HOVADUR® CCNB eh
| Material designation, EN standard | | CuCo1Ni1Be | Material No., EN standard | | CW103C | Material No., former DIN standard | | None. Comparable to 2.1285 (CuCo2Be) | Material No., UNS system (ASTM) | | None. Comparable to C17500 (CuCo2Be) | Classification RWMA (USA) | | Class 3 |
Information about standards
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EN | EN12163 (Round bars), EN12167 (Flat bars, profiles), EN12420 (Forged products) – but the properties of
HOVADUR® CCNB eh exceed considerably the requirements of the standards. | DIN (former) | (DIN17666/DIN17672) | ASTM | (B441, B534) |
Description of material
| HOVADUR® CCNB eh 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.
Due to vacuum technology and special processes, clearly better properties compared to standard quality HOVADUR®
CCNB can be agreed. |
Safety data sheet
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SCHMELZMETALL No. 07.02E (Issue 30.07.2002)
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Material properties
| Chemical composition in % of weight (guaranteed ranges) |
Co | Ni | Be | Fe | Si | others total | Cu | 0.8-1.3 | 0.8-1.3 | 0.4-0.7 | max. 0.2 | max. 0.2 | 0.5 | Remainder |
Agreed properties at 20 °C (Condition: hardened, solution heat treated respectively)
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Condition | | hardened | solution heat treated | Hardness Brinell HB | | min. 260 *) | max. 110 *) | Electrical conductivity | MS/m | min. 28 | max. 13 | Electrical conductivity | % IACS | min. 48.0 | max. 22.5 |
| *) In case of different opinions, hardness is calculated as the average of 3 randomly located measurings. |
Associated properties at 20 °C (Condition: hardened, solution heat treated respectively) |
Condition | | | hardened | solution heat treated | Tensile strength | 1) | N/mm² (MPa) | min. 750 | max. 500 | 0.2% yield strength | 1) | N/mm² (MPa) | min. 650 | max. 400 | Elongation (A5) | 1) | % | min. 8 | min. 25 |
| 1) Strength values will only be proved if ordered by the customer. |
Material information (nominal values)
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Elastic modulus | N/mm² (MPa) | 135,000 | | Softening temperature | °C | 480 | | Specific weight | g/cm³ | 8.85 | | Thermal conductivity | W/mK | 230-250 | (Average 20 °C-300 °C) | Thermal expansion coefficient | x 10-6 /°K | 17.2 | (Average 20 °C-300 °C) | Melting interval | °C | 1000-1030 | |
Processing instructions Hot forming
HOVADUR® CCNB eh 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 eh will normally no
longer be achieved. Cold forming
HOVADUR® CCNB eh in hardened condition is not intended for cold forming. In case, a cold forming has to be executed,
HOVADUR® CCNB eh 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: 930–970 °C, about 30 minutes followed by quenching in water
Hardening: 460–500 °C, 2–5 h followed by cooling at the air Machining
HOVADUR® CCNB eh 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 eh 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® CCNB eh 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