What is SI GC 202?
SI GC 202 (designation per EN 60893; corresponds to Hgw 2572 per DIN 7735) is a glass-fabric-reinforced silicone-resin laminate and the high-temperature specialty material among the glass-fabric laminates in Liedtke's range. The silicone-resin matrix enables a continuous-use temperature of up to 180 °C combined with very high tracking resistance (CTI 600) – significantly more than epoxy or cotton-fabric laminates achieve.
Technical Data
| Property | Value | Test Standard |
|---|---|---|
| General Properties | ||
| Density | 1.7 g/cm³ (range 1.6-1.7) | DIN 53479 |
| Water absorption (5 mm thickness) | 13 mg (DIN 7735 max. 50 mg) | DIN 53495 |
| Colour | white | – |
| Mechanical Properties | ||
| Flexural strength | 240 MPa (DIN 7735 min. 125 MPa) | DIN 53452 |
| Impact strength | 95 kJ/m² (DIN 7735 min. 40 kJ/m²) | DIN 53453 |
| Notched impact strength | 60 kJ/m² (DIN 7735 min. 25 kJ/m²) | DIN 53453 |
| Tensile strength | 164 MPa (DIN 7735 min. 90 MPa) | DIN 53455 |
| Compressive strength | 120 MPa (DIN 7735 min. 50 MPa) | DIN 53454 |
| Modulus of elasticity | 19000 MPa (DIN 7735 min. 13000 MPa) | DIN 53452 |
| Thermal Properties | ||
| Limiting temperature | 180 °C | VDE 0304, T.21 |
| Thermal conductivity | 0.3 W/(m·K) | DIN 52612 |
| Electrical Properties | ||
| Electric strength ∥ | 30 kV (DIN 7735 min. 20 kV) | DIN 53481 |
| Dielectric constant | 5 | DIN 53483 |
| Comparative tracking index CTI | 600 (DIN 7735 min. 440) | IEC 60112 |
SI GC 202 in detail
1What is SI GC 202?+
SI GC 202 (per EN 60893, corresponding to Hgw 2572 per DIN 7735) is a glass-fabric-reinforced silicone-resin laminate with very high continuous-use temperature resistance (180 °C) and very high tracking resistance (CTI 600). It is technically identical to HGW 2572, also offered by Liedtke, and its US-market designation HGW 2572-F2 - the EN 60893 standard simply uses "SI GC 202" instead of the DIN designation "Hgw 2572".
2How does Liedtke machine SI GC 202?+
We saw, mill, drill and turn SI GC 202 with sharp, carbide-tipped or diamond-coated tools into dimensionally accurate precision parts. We ensure adequate dust extraction during machining, as resin and glass fibre dust is generated.
3When should I choose SI GC 202?+
SI GC 202 pays off whenever high temperature resistance and tracking resistance are required together, for example:
- Slot insulation in electric motors and generators with high operating temperature
- Insulating parts in transformer and coil construction
- Components in heating and thermal engineering
- High-temperature insulating parts in aerospace and rail technology
- Electrical engineering applications requiring both high tracking resistance and high temperature
4What determines the price of an SI GC 202 part?+
The component price is determined mainly by sheet thickness, dimensions, material utilisation (offcuts), machining effort and batch size. SI GC 202 is the premium material among the glass-fabric laminates in Liedtke's range due to the more expensive silicone resin. We are happy to provide binding prices on request based on your drawing.
5When is SI GC 202 not the right choice?+
SI GC 202 is not declared for direct food contact. Without a particular temperature requirement, an epoxy or cotton-fabric laminate is more economical, and for applications requiring very high mechanical strength, HGW 2372.1 is superior.
6Advantages and disadvantages of SI GC 202+
An honest assessment, and how the disadvantages can be mitigated in practice:
- Advantage: Very high continuous-use temperature resistance (180 °C)
- Advantage: Very high tracking resistance (CTI 600)
- Advantage: Low water absorption
- Advantage: Good electrical insulation properties even at high temperature
- Advantage: Light, white surface
- Disadvantage: Not declared for direct food contact
- Disadvantage: Highest price among the fabric-laminate grades
- Disadvantage: Lower mechanical strength than Hgw 2372.1
- Disadvantage: Higher tool wear during machining (glass fabric)
- Disadvantage: Uneconomical for applications without high temperature requirements
Typical Properties
- Very high continuous-use temperature resistance (180 °C)
- Very high tracking resistance (CTI 600)
- Low water absorption
- Good electrical insulation properties even at high temperature
- Thermoset laminate (dimensionally stable)
- Colour white
Typical Industries
- Electric motor and generator construction
- Heating and thermal engineering
- Transformer and coil construction
- Electrical engineering and switchgear construction
- Aerospace and rail technology
- Jig, fixture and tool making
Downloads for SI GC 202
Related Materials
Request a Quote for Your SI GC 202 Part
A drawing or sample is enough. We calculate a concrete price and give you an honest recommendation on whether SI GC 202 is the optimal choice for your application or whether an alternative would make more sense.
Send Inquiry