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Conventional machine nozzles
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Mould insert to produce bucket covers
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Front part of an ejector pin
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Front part of an ejector pin
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HOVADUR® K 350
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Description of material
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HOVADUR® K 350 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, high wear resistance, high resistance against seizing and good polishing properties 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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Advice
SCHMELZMETALL alloy HOVADUR® K 350 is a modification of the alloy HOVADUR® CB2 which is produced according to special processes and heat treatments. Concerning safety aspects, the same information as for HOVADUR® CB2 is valid. |
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Material properties
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Chemical composition in % of weight (nominal values)
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Be
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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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1.9
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0.3
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< 0.1
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< 0.1
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< 0.5
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Remainder
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Agreed properties at 20 °C (Condition: hardened)
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Hardness Brinell HB
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350-410 *)
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Electrical conductivity
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MS/m
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min. 16
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(min. 27.6% IACS)
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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)
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Tensile strength
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1)
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N/mm² (MPa)
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1150-1350
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0.2% yield strength
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1)
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N/mm² (MPa)
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1000-1250
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Elongation (A5)
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1)
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%
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3- 8
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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® K 350 is not intended for hot forming.
Advice: After a hot forming executed by the customer, the properties of HOVADUR® K 350 will normally no
longer be achieved.
Cold forming
In hardened condition, HOVADUR® K 350 is not intended for cold forming.
Heat treatment
A heat treatment of HOVADUR® K 350 is not recommended. In general, it changes the agreed properties which will no
longer be achieved afterwards.
Machining
HOVADUR® K 350 is suitable for machining. We recommend standard hard metal 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.
Bigger inside threads should be executed by circular thread milling.
In case of more important machining work, pre-machining in solution heat treated condition may be reasonable (Before
planning, please ask SCHMELZMETALL for possibility to supply solution heat treated condition and to do heat treatment
after machining).
HOVADUR® K 350 is suited for polishing.
Joining
HOVADUR® K 350 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® K 350 is suited for welding. Attention
must be paid to sufficient extraction and filtering of welding fume.
Application examples
Mechanically highly strained mould parts in mould making for plastic injection. Parts for precision measuring instruments.
Sparkling-free and non magnetic safety parts for on-/offshore drilling.
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