Overview
HGW 2572-F2 (Hgw 2572-F2 acc. to DIN 7735, SI GC 202 acc. to EN 60893) is a glass-fabric-reinforced silicone-resin laminate and technically identical to HGW 2572, also offered by Liedtke. The designation "-F2" is a US-market labelling variant of this material and not an independently verified, standalone NEMA standard designation.
Glass-fabric layers are impregnated with silicone resin and pressed under heat and pressure into sheets or round bars. Compared with phenolic and epoxy resin, silicone resin offers exceptionally high thermal resistance: HGW 2572-F2 withstands continuous temperatures of up to 180 °C, combined with very high tracking resistance (CTI 600). The colour is characteristically white.
Typical applications correspond to those of HGW 2572: slot insulation in electric motors and generators, insulating parts in transformer and coil construction, components in heating and thermal engineering, and high-temperature insulating parts in aerospace and rail technology.
Technical Data
| Property | Value | Test Standard |
|---|---|---|
| Mechanical Properties | ||
| Flexural strength | 240 MPa (DIN 7735 minimum 125 MPa) | DIN 53452 |
| Impact strength | 95 kJ/m² (DIN 7735 minimum 40 kJ/m²) | DIN 53453 |
| Notched impact strength | 60 kJ/m² (DIN 7735 minimum 25 kJ/m²) | DIN 53453 |
| Tensile strength | 164 MPa (DIN 7735 minimum 90 MPa) | DIN 53455 |
| Compressive strength | 120 MPa (DIN 7735 minimum 50 MPa) | DIN 53454 |
| Modulus of elasticity | 19000 MPa (DIN 7735 minimum 13000 MPa) | DIN 53452 |
| Electrical Properties | ||
| Electric strength ∥ | 30 kV (DIN 7735 minimum 20 kV) | DIN 53481 |
| Dielectric constant | 5 | DIN 53483 |
| Comparative tracking index CTI | 600 (DIN 7735 minimum 440) | IEC 60112 |
| Thermal Properties | ||
| Limiting temperature | 180 °C | VDE 0304, T.21 |
| Thermal conductivity | 0.3 W/(m·K) | DIN 52612 |
| 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 | – |
Frequently Asked Questions about HGW 2572-F2
1What is HGW 2572-F2?+
HGW 2572-F2 is a glass-fabric-reinforced silicone-resin laminate per DIN 7735 / EN 60893 (SI GC 202) and technically identical to HGW 2572. "-F2" is simply a US-market designation variant, not an independent NEMA standard designation.
2How does Liedtke machine HGW 2572-F2?+
We saw, mill, drill and turn HGW 2572-F2 with sharp, carbide-tipped or diamond-coated tools into dimensionally accurate precision parts. We ensure adequate dust extraction during machining, as glass fibre dust is generated.
3What determines the price of an HGW 2572-F2 part?+
The component price is determined mainly by sheet thickness, dimensions, material utilisation (offcuts), machining effort and batch size. Like HGW 2572, HGW 2572-F2 is the premium material among the fabric laminates due to the more expensive silicone resin. We are happy to provide binding prices on request based on your drawing.
4When is HGW 2572-F2 not the right choice?+
HGW 2572-F2 is not declared for direct food contact. Without a particular temperature requirement, an epoxy or cotton-fabric laminate is more economical; for applications requiring very high mechanical strength, HGW 2372.1 is superior.
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