NP610 Paper Phenolic Laminate Sheet
NP610 Paper Phenolic Laminate Sheet is a phenolic paper based composite meeting ANSI/NEMA IM 60000-2021 Grade X, MIL-I-24768/12 Type PBM, ASTM D709 Type X, and IEC 60893-3-4 PFCP 201, designed for mechanical applications with good tensile, compressive, and flexural strength. The material delivers a flexural strength of 34,000 / 28,000 psi (LW/CW) — the highest in the paper phenolic laminate line — a compressive strength of 35,000 psi flatwise, and an arc resistance of 90 seconds. Primarily a machining material, NP610 may also be hot punched in thicknesses up to 0.093″. Not UL Listed.
Key Properties
- Flexural Strength, Condition A LW / CW: 34,000 / 28,000 psi (234.4) / (193.1) MPa (ASTM D790)
- Flexural Modulus, Condition A LW / CW: 1,900 / 1,400 kpsi (13.1) / (9.7) GPa (ASTM D790)
- Tensile Strength, Condition A LW / CW: 17,000 / 13,000 psi (117.2) / (89.6) MPa (ASTM D638)
- Compressive Strength, Condition A Flatwise: 35,000 psi (241.3) MPa (ASTM D695)
- Arc Resistance, Condition A: 90 sec (ASTM D495)
- Temperature Index — Electrical / Mechanical: 130 / 130°C (UL Bulletin 746b)
We want to help!
Enter your information and we'll get you in touch with our knowledgable staff. We know how important to the right product for your project.
Request a Consultation
- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Specific Gravity | 1.40 | ASTM D792 |
| Rockwell Hardness (0.250″ Build-up) | 90 M Scale | ASTM D785 |
| Moisture Absorption, Condition D₁-24/23 (0.0625″) | 1.80% | ASTM D570 |
| Moisture Absorption, Condition D₁-24/23 (0.500″) | 0.58% | ASTM D570 |
| Flexural Strength, Condition A LW / CW | 34,000 / 28,000 psi (234.4) / (193.1) MPa | ASTM D790 |
| Flexural Modulus, Condition A LW / CW | 1,900 / 1,400 kpsi (13.1) / (9.7) GPa | ASTM D790 |
| Tensile Strength, Condition A LW / CW | 17,000 / 13,000 psi (117.2) / (89.6) MPa | ASTM D638 |
| Izod Impact Strength, Condition E-48/50 LW / CW | 0.82 / 0.76 ft-lb/in (0.44) / (0.41) J/cm | ASTM D256 |
| Compressive Strength, Condition A Flatwise | 35,000 psi (241.3) MPa | ASTM D695 |
| Bonding Strength, Condition A | 1,000 lb (453.6) kg | ASTM D229 |
| Shear Strength, Condition A Perpendicular | 15,000 psi (103.4) MPa | ASTM D732 |
Thermal Properties
| Property | Value | Test Method |
| Temperature Index — Electrical / Mechanical | 130 / 130°C | UL Bulletin 746b |
| Coefficient of Thermal Expansion, X-axis / Y-axis | 13.0 / 17.0 (“/”/°C × 10⁻⁶) | IPC-TM 650-2.4.24 |
| Flammability Rating, Condition A | HB | UL Bulletin 94 |
Electrical Properties
| Property | Value | Test Method |
| Breakdown Voltage, Condition A | 40 kVolts | ASTM D149 |
| Electric Strength, Condition A | 600 Volts/mil (236.2) kV/cm | ASTM D149 |
| Arc Resistance, Condition A | 90 sec | ASTM D495 |
Compliance
- ANSI/NEMA IM 60000-2021 Grade X — Compliant
- MIL-I-24768/12 Type PBM — Compliant
- ASTM D709 Type X — Compliant
- IEC 60893-3-4 PFCP 201 — Compliant
- Precision-machined mechanical phenolic components requiring highest flexural and tensile strength in the paper phenolic line
- Hot-punched phenolic components up to 0.093″ thickness
- Structural insulation panels and supports requiring NEMA Grade X compliance
- General mechanical applications where strength is the primary design driver
- Military applications requiring MIL-I-24768/12 Type PBM compliance
Common industries: Electrical Equipment Manufacturing, Defense, Industrial Manufacturing, Mechanical Power Transmission, General Engineering.
NP610 Paper Phenolic Laminate Sheet is the NEMA Grade X entry in the paper phenolic laminate line — the highest flexural and tensile strength grade in the paper phenolic family.
With a flexural strength of 34,000 / 28,000 psi (LW/CW) and a tensile strength of 17,000 / 13,000 psi (LW/CW), NP610 delivers significantly higher mechanical strength than the XX and XXX grades at the cost of lower electrical performance, making it the appropriate selection for mechanical applications where strength is the primary driver and electrical insulation is a secondary requirement.
In addition to CNC machining, the material may be hot punched in thicknesses up to 0.093″ — a processing option not available with canvas or linen phenolic grades — offering an economical fabrication route for high-volume punched components.
The temperature index is 130°C electrical / 130°C mechanical and arc resistance is 90 seconds (Condition A). Moisture absorption varies with thickness: 1.80% at 0.0625″ and 0.58% at 0.500″. Electric strength reaches 600 Volts/mil (Condition A). Flammability is rated HB per UL Bulletin 94. NP610 is not UL Listed.
Compliant with ANSI/NEMA IM 60000-2021 Grade X, MIL-I-24768/12 Type PBM, ASTM D709 Type X, and IEC 60893-3-4 PFCP 201.
What differentiates NP610 Paper Phenolic Laminate Sheet from NP629 (Grade XX) and NP630 (Grade XXX)?
NP610 (Grade X) delivers the highest flexural strength (34,000 / 28,000 psi LW/CW) and tensile strength (17,000 / 13,000 psi LW/CW) in the paper phenolic laminate line, optimized for mechanical applications. NP629 (Grade XX) and NP630 (Grade XXX) are designed for applications requiring progressively better electrical properties — NP630 in particular delivers excellent electrical properties, moisture resistance, low cold flow, and the highest compressive strength (45,000 psi) in the line. NP610 is the only grade in this family that may be hot punched up to 0.093" thickness.
Why does flexural strength matter when selecting a paper phenolic laminate for mechanical applications?
Flexural strength determines how much bending load a laminate panel or machined component can sustain before permanent deformation or fracture. For structural insulation panels, mounting brackets, and mechanical components under sustained or cyclic bending loads, a higher flexural strength provides greater load capacity and safety margin. NP610's flexural strength of 34,000 / 28,000 psi (LW/CW) substantially exceeds that of the XX and XXX grades (22,000 / 17,000–18,000 psi), making it the appropriate selection wherever mechanical load capacity is the governing design criterion.
What is the temperature index for NP610 Paper Phenolic Laminate Sheet?
The temperature index is 130°C electrical / 130°C mechanical, as listed on the Technical Datasheet.
Is NP610 Paper Phenolic Laminate Sheet suitable for military and regulated environments?
Yes. NP610 complies with ANSI/NEMA IM 60000-2021 Grade X, MIL-I-24768/12 Type PBM, ASTM D709 Type X, and IEC 60893-3-4 PFCP 201. NP610 is not UL Listed and carries a UL 94 HB flammability rating. Applications requiring superior electrical properties should specify NP629 (Grade XX) or NP630 (Grade XXX).
How should NP610 Paper Phenolic Laminate Sheet be specified?
Specify grade (NP610 Paper Phenolic Laminate Sheet), thickness, fabrication method (machined or hot punched — hot punching available up to 0.093"), compliance requirements (NEMA Grade X, MIL-I-24768/12, or ASTM D709 as applicable), dimensional tolerances, and finished format.
