Silit® Beams

Siliconized SiC (SiSiC) Beams

Beams are available in at least three different materials, namely Silit® SKD - siliconized silicon carbide; Advancer® nitride bonded silicon carbide, and Hexoloy® SE sintered silicon carbide. Beams can be made in large selections of cross-sections, wall thickness and lengths (up to 4 m) using slip-casting or extrusion process. As-fired beams can be used "as-is" or finished to customer’s tolerances. Applications include structural support in high temperature processes, and metrology equipment.

Features and Benefits

Benefits

Saint Gobain SiSiC and NSiC products allow high precision, accuracy and speed in industrial metrology equipment, such as CMM and Positioning Equipment, due to their high specific stiffness, lightweight, low thermal expansion and high thermal conductivity. The unique combination of several key properties of silicon carbide makes it a superior choice to other materials, including alumina ceramic, aluminum, steel and granite. Key applications include CMM bridges and Z axis; guide rails and air-bearing stages.

 

Silicon carbide offers many advantages over traditional ceramic materials:

  • Lightweight (~20% less)
  • High specific stiffness (~25% higher)
  • Low thermal expansion (~50% less)
  • High thermal stability
Product Use Material Properties
Properties Unit Value
Main Components

SiC

Si

 

%

%

85

15

Maximum Application Temperature1)     °C 1380
Bulk Density EN 993-1   kg/dm3 3.0
Apparent Porosity EN 993-1   Vol. % 0
Young's Modulus EN 843-2 RT2) GPa 340
Modulus of Rupture

EN 993-6

EN 993-7

RT2)

1200°C

MPa

MPa

260

260

Coefficient of Thermal Expansion EN 993-10 α RT…1?300°C 10-6/K 4.5
Thermal Conductivity EN 993-15 1000°C W/(m*K) 35

1) Dependent on the corresponding operating conditions

2) Ambient temperature

Size

Below listed dimensions cover the majority of stardart sizes. Larger sizes and tighter tolerances on request.
 

Dimensions Tolerance X mm Wall Thickness +1/-0,5 mm Max Length ± 2 mm
Height H ± X mm Width B ± X mm
20 20 ± 1,0 6 2000
25 25 ± 1,0 6 2000
30 20 ± 1,0 6 2000
30 30 ± 1,0 6 2000
35 35 ± 1,0 6 2000
40 20 ± 1,0 6 2000
40 25 ± 1,0 6 2000
40 30 ± 1,0 6 3000
40 40 ± 1,0 6 3500
50 30 ± 1,0 6 3500
50 40 ± 1,0 6,3 3500
50 50 ± 1.0 6,3 3500
60 40 ± 1.2 6,8 3500
60 50 ± 1.2 6,8 3500
60 60 ± 1.2 7,3 3500
70 40 ± 1.4 7,5 3500
70 50 ± 1.4 7,5 3500
70 60 ± 1.4 7,5 3500
80 40 ± 1.4 8 3500
80 60 ± 1.4 8,5 3500
80 80 ± 1.4 9 3500