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Metallic materials and metallurgy industry

High precise moulded details from beryllium alloys

High-precise moulded details from beryllium-aluminum alloys are applied as housings of precise devices; complex assemblies of significant heat capacity; mounting assemblies for outboard parts. Beryllium casting alloys are characterized by sufficient adaptability to manufacture. Their usage gives a possibility to fabricate complex high-rigid and temperature stable thin-walled details.

Method of manufacturing:

Moulding according to investment patterns.

Delivery terms:

  1. Casts are supplied in heat-treated condition.
  2. Cast surfaces are protected by chemical passivating coating.

Weight and dimensions of assemblies and details:

Designation Dmax, mm Lmin, mm Mmin, kg Мmаx, kg
932.13.-LBS-0 500 1,5 ± 0,3 0,1 10

where:
  • Lmin - minimum wall thickness;
  • Dmax - maximum diameter of item.

Note: Complex high-rigid and temperature stable thin-walled details can be produced in accordance with the customer’s drawings.

Safe handling with details and assemblies from beryllium alloys is ensured by application of protective coatings.

Technical characteristics of cast beryllium alloy:

Tensile strength >210 MPa
Tensile yield >180 MPa
Relative extension >2 %
Modulus of elasticity 220 GPa
Density 2100 kg/m3
Precision limit of elasticity >60 MPa
Conventional limit of relaxation >40 MPa
Specific heat capacity 1400 J/kg × К
Thermal conductivity 60 - 90 W/m × К
Thermal coefficient of linear expansion (TCLE) 14.0×10-6 1/°С
Thermal conductivity 0.21×10-4 m2/sec
Specific electrical resistivity (4,6 - 5,4)×10-8 Ohm × m
Casting temperature 1250 - 1300 °С
Ability to fill a mould (at 600 °С)
- height of filling of a wall of 1.5 mm thick 63 - 94 mm
- linear shrinkage 1,25 %
- volume shrinkage 8,3 %
- including- concentrated 4,6 %
- shrinkage porosity 3,7 %





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