NP513FR Glass Epoxy Laminate Sheet
NP513FR Glass Epoxy Laminate Sheet is a flame-retardant woven glass fabric composite complying with ANSI/NEMA IM 60000-2021 Grade FR-5, MIL-I-24768/28 Type GEB-F, and ASTM D709 Type IV Grade FR-5, with a UL 94 V-0 flammability rating. The material delivers a flexural strength of 64,300 / 53,600 psi (LW/CW) and a compressive strength of 71,000 psi flatwise, with high mechanical strengths — flexural and impact — at room temperature and good dielectric loss and electric strength properties. Available in thicknesses of 0.500″ and above.
Key Properties
- Flexural Strength, Condition A LW / CW: 64,300 / 53,600 psi (443.3) / (369.6) MPa (ASTM D790)
- Tensile Strength, Condition A LW / CW: 46,500 / 36,600 psi (320.6) / (252.3) MPa (ASTM D638)
- Izod Impact Strength, Condition E-48/50 LW / CW: 14.20 / 10.60 ft-lb/in (7.58) / (5.66) J/cm (ASTM D256)
- Compressive Strength, Condition A Flatwise: 71,000 psi (489.5) MPa (ASTM D695)
- Flammability Vertical, Condition A: V-0 (UL Bulletin 94)
- Breakdown Voltage, Condition A: 77 kVolts (ASTM D149)
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Specific Gravity | 1.93 | ASTM D792 |
| Moisture Absorption, Condition D₁-24/23 | 0.03% | ASTM D570 |
| Flexural Strength, Condition A LW / CW | 64,300 / 53,600 psi (443.3) / (369.6) MPa | ASTM D790 |
| Flexural Strength, Condition E-1/150: T-150 LW / CW | 2,900 / 2,800 psi (20.0) / (19.3) MPa | ASTM D790 |
| Tensile Strength, Condition A LW / CW | 46,500 / 36,600 psi (320.6) / (252.3) MPa | ASTM D638 |
| Izod Impact Strength, Condition E-48/50 LW / CW | 14.20 / 10.60 ft-lb/in (7.58) / (5.66) J/cm | ASTM D256 |
| Compressive Strength, Condition A Flatwise | 71,000 psi (489.5) MPa | ASTM D695 |
| Bonding Strength, Condition A | 2,500 lb (1,134.0) kg | ASTM D229 |
| Bonding Strength, Condition D-48/50 | 2,570 lb (1,165.7) kg | ASTM D229 |
| Shear Strength, Condition A Perpendicular | 19,300 psi (133.1) MPa | ASTM D732 |
Thermal Properties
| Property | Value | Test Method |
| Temperature Index — Electrical / Mechanical | 130 / 140°C | UL Bulletin 746b |
| Tg by DMA | 130°C | — |
| Flammability Vertical, Condition A | V-0 | UL Bulletin 94 |
Electrical Properties
| Property | Value | Test Method |
| Dissipation Factor @ 1 MHz, Condition D-24/23 | 0.017 | ASTM D150 |
| Relative Permittivity @ 1 MHz, Condition D-24/23 | 4.84 | ASTM D150 |
| Breakdown Voltage, Condition A | 77 kVolts | ASTM D149 |
| Breakdown Voltage, Condition D-48/50 | 67 kVolts | ASTM D149 |
| Electric Strength, Condition A | 170 Volts/mil (66.9) kV/cm | ASTM D149 |
Compliance
- ANSI/NEMA IM 60000-2021 Grade FR-5 — Compliant
- MIL-I-24768/28 Type GEB-F — Compliant
- ASTM D709 Type IV Grade FR-5 — Compliant
- High-load flame-retardant electrical insulation structural components
- Switchgear insulating parts requiring V-0 rating and high compressive strength
- Precision-machined FR-5 insulating components for military applications
- Electrical equipment requiring NEMA FR-5 or MIL-I-24768/28 compliance
- Flame-retardant structural panels in industrial electrical enclosures
Common industries: Electrical Equipment Manufacturing, Defense, Power Distribution, Industrial Manufacturing.
NP513FR Glass Epoxy Laminate Sheet is the NEMA Grade FR-5 entry in the Norplex-Micarta glass epoxy laminate line — a flame-retardant, high-strength laminate designed for applications requiring both V-0 flammability performance and elevated mechanical properties at room temperature.
FR-5 combines the flame retardancy of a halogenated epoxy system with compressive and impact strengths that exceed standard FR-4 in many respects, including an Izod impact strength of 14.20 / 10.60 ft-lb/in (LW/CW) and a compressive strength of 71,000 psi flatwise. The material is available in thicknesses of 0.500″ and above.
The elevated-temperature flexural strength at Condition E-1/150 (T-150) is 2,900 / 2,800 psi (LW/CW), indicating reduced mechanical performance at sustained high-temperature service — NP513FR is optimized for room-temperature mechanical performance with V-0 flame retardancy rather than elevated-temperature structural service.
Breakdown voltage reaches 77 kV (Condition A), electric strength is 170 Volts/mil (Condition A), dissipation factor is 0.017, and relative permittivity is 4.84. Moisture absorption is 0.03% — the lowest in the glass epoxy laminate line. The glass transition temperature is 130°C and temperature index is 130°C electrical / 140°C mechanical.
Compliant with ANSI/NEMA IM 60000-2021 Grade FR-5, MIL-I-24768/28 Type GEB-F, and ASTM D709 Type IV Grade FR-5.
What differentiates NP513FR Glass Epoxy Laminate Sheet from NP510A (FR-4)?
NP513FR is classified NEMA FR-5 and achieves a higher compressive strength (71,000 psi vs. 66,000 psi for NP510A) and higher Izod impact strength (14.20 / 10.60 ft-lb/in vs. 7.90 / 7.30 ft-lb/in). Both grades achieve UL 94 V-0. Key differences: NP513FR is available 0.500" and above only (NP510A is available in thinner gauges), NP513FR is not UL Listed (NP510A is UL Listed for thicknesses >0.029"), and NP513FR complies with MIL-I-24768/28 Type GEB-F (NP510A complies with MIL-I-24768/27 Type GEE-F).
Why does impact strength matter when selecting a flame-retardant glass epoxy laminate?
Izod impact strength measures resistance to sudden fracture under dynamic loading — relevant in applications where insulating components are subject to mechanical shock, installation stress, or vibration. NP513FR's impact strength of 14.20 / 10.60 ft-lb/in (LW/CW) provides a meaningful margin over standard FR-4 grades, making it the appropriate selection for structural insulation components in demanding mechanical environments where both V-0 flame retardancy and fracture resistance are required.
What is the temperature index for NP513FR Glass Epoxy Laminate Sheet?
The temperature index is 130°C electrical / 140°C mechanical, as listed on the Technical Datasheet.
Is NP513FR Glass Epoxy Laminate Sheet suitable for military and regulated electrical environments?
Yes. NP513FR complies with ANSI/NEMA IM 60000-2021 Grade FR-5, MIL-I-24768/28 Type GEB-F, and ASTM D709 Type IV Grade FR-5, and achieves a UL 94 V-0 flammability rating. Note that NP513FR is not UL Listed.
How should NP513FR Glass Epoxy Laminate Sheet be specified?
Specify grade (NP513FR Glass Epoxy Laminate Sheet), thickness (0.500" minimum), compliance requirements (NEMA FR-5, MIL-I-24768/28, or ASTM D709 as applicable), dimensional tolerances, and finished format.
