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Gliding elements
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Sheet rolling device for barrels
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Wearing element
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Material designation SCHMELZMETALL
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HOVADUR® B 30
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Material designation, EN standard
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CuAl11Fe6Ni6
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Material No., EN standard
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CW308G
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Material No., former DIN standard
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2.0978
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Material No., UNS system (ASTM)
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not standardized
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Information about standards
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EN
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EN12163 (Round bars), EN12167 (Flat bars), EN12420 (Forged products)
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DIN (former)
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(DIN17665/DIN17672/DIN17678)
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ASTM
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not standardized
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Description of material
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HOVADUR® B 30 is a multiphase copper aluminium alloy with addition of nickel and iron (aluminium bronze). The alloy
combines very high tensile strength, even at higher temperature, with very high wear resistance as well as good resistance
to corrosion, wear and cavitation resistance. HOVADUR® B 30 is resistant against sea water and has a very good
oxidation behaviour (no scale).
Due to the melting and casting procedure employed by SCHMELZMETALL, HOVADUR® B 30 shows remarkably less tool
wear in case of machining compared to other aluminium bronzes.
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Material properties
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Chemical composition in % of weight (guaranteed ranges)
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Al
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Fe
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Ni
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Mn
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others total
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Cu
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10.5-12,5
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5.0-7.0
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5.0-7.0
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max. 1.5
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0.5
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Remainder
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Agreed properties at 20 °C
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Hardness Brinell HB
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220-260 *)
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Electrical conductivity
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MS/m
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about 4.5
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(standard value)
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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
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Tensile strength
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1)
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N/mm² (MPa)
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min. 740
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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. 420
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Elongation (A5)
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1)
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%
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min. 5
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| 1) Strength values will only be proved if ordered by the customer. |
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Material information (typical values = nominal values)
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Elastic modulus
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N/mm² (MPa)
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115,000
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Softening temperature
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°C
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600
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Specific weight
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g/cm³
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7.4
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Thermal conductivity
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W/mK
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56
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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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16
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(Average 20 °C-300 °C)
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Melting interval
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°C
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1070-1085
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Processing instructions
Hot forming
HOVADUR® B 30 is very suitable for hot forming at temperatures of about 900 °C to 700 °C. According to the degree
and the kind of forming, heating to 800 °C up to 850 °C is sufficient. After forming, cooling of the material is recommended
at inactive air.
Cold forming
HOVADUR® B 30 is not suited for cold forming.
Heat treatment
After hot formings, a homogenizing and tension reducing annealing at a temperature between 600 °C and 650 °C
during 2 to 5 hours is recommmended.
Machining
In normal condition, HOVADUR® B 30 can be machined with standard hard metal tools. Material has a tenacious character.
HOVADUR® B 30 is suited for eroding. No special measures are necessary for grinding and polishing. Surface may be
coated according to all usual procedures.
Joining
HOVADUR® B 30 is well suited for soldering, but concerning hard soldering, a (small) loss in hardness is to be expected.
A very lowly melting silver brazing should be used.
HOVADUR® B 30 is very well suited for joining by welding. Build-up welding is suitable, too.
Attention must be paid to sufficient extraction and filtering of welding fume.
Application examples
Due to its specific, very interesting combination of properties, the alloy HOVADUR® B 30 is excellent for many applications.
Typical examples are utmost strained bearings, guide bushes, valves and valve faces, sliding elements and wearing plates.
Due to its combination of good resistance to corrosion, good strength, even at higher temperatures, and non-sparking
property, it is excellent for many applications in plant construction, such as chemical industry, oil/gas industry as well as
for offshore and marine uses.
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