g10-header
Low Water Absorption
Superior Electrical Properties
Fire Retardant

G-10 (FR-4 grade), the best insulating material

Our G-10 is made up of a mixture of epoxy resin and glass cloth, so you know it’s got strength under pressure. With superior electrical insulation properties, when both wet and dry, it’s the most widely used insulator for electrical applications in the industry. It boasts incredibly high mechanical strength and rigidity and has excellent dimensional stability over a wide temperature range, along with low water absorption rates.

Honestly, G-10 FR-4 is used most often in laminate circuit boards, but it does have a great many uses including insulating washers and transformer components. You’ll also find it used in firearm and knife grips due to its ability to take texture and color well. Any time you’re interacting with consumer electronics, you can assume that you’re in the vicinity of G-10 somewhere.

That said, if you need something to get wet and be lightweight while doing it, G-10 is the material for you. Often used in marine applications for housings and electronic components, this versatile composite is able to withstand harsh marine environments. Some spearfishermen even use it as the primary material for their spear guns due to its lightweight nature and low water absorption.

Machining G-10 FR-4 parts can be challenging for some, but that’s why you come to SendCutSend with your designs, you can trust us to handle the heavy lifting for you and let you focus on the big picture.

Material Details

Details
Advertised Thickness .063″ | 1.6mm
Gauge N/A
Thickness Tolerance Positive .008″
Thickness Tolerance Negative .008″
Cutting Process Waterjet
Cut Tolerance .009″
Available Operations
Deburring No
Bending No
Tapping N0
Powder Coating No
Hardware No
Design Considerations
Min Part Size 1″ x 2″
Max Part Size 46″ x 30″
Min Hole Size .070″
Min Bridge Size .063″
Tab and Slot Tolerance .015″
Properties
Material Composition G10 is a thermoset resin formed by the polymerization of phenol and formaldehyde, which can then be impregnated with glass cloth material to form an industrial laminate.
Density 112.32 lb/ft^3
Tensile Strength (Yield) Lengthwise: 45 ksi
Crosswise:  38ksi
Shear Strength Lengthwise: 75 ksi
Crosswise:  65 ksi
Comprehensive Strength 65 ksi
Flexural Modulus Lengthwise: 2.7 ksi
Crosswise:  2.4 ksi
Isod Impact (Notched), ft-lb/in Lengthwise: 13 ksi
Crosswise:  14 ksi, 12 ksi
Rockwell Hardness M110
Elastic Modulus  
Poisson’s Ratio  
Thermal Conductivity 2 BTU-in/hr-ft^2 °F
Flammability Ratings VO
Magnetic No
Details
Advertised Thickness .125″ | 3.18mm
Gauge N/A
Thickness Tolerance Positive .012″
Thickness Tolerance Negative .012″
Cutting Process Waterjet
Cut Tolerance .009″
Available Operations
Deburring No
Bending No
Tapping N0
Powder Coating No
Hardware No
Design Considerations
Min Part Size 1″ x 2″
Max Part Size 46″ x 30″
Min Hole Size .070″
Min Bridge Size .125″
Tab and Slot Tolerance .020″
Properties
Material Composition G10 is a thermoset resin formed by the polymerization of phenol and formaldehyde, which can then be impregnated with glass cloth material to form an industrial laminate.
Density 112.32 lb/ft^3
Tensile Strength (Yield) Lengthwise: 45 ksi
Crosswise: 38ksi
Shear Strength Lengthwise: 75 ksi
Crosswise: 65 ksi
Comprehensive Strength 65 ksi
Flexural Modulus Lengthwise: 2.7 ksi
Crosswise: 2.4 ksi
Isod Impact (Notched), ft-lb/in Lengthwise: 13 ksi
Crosswise: 14 ksi, 12 ksi
Rockwell Hardness M110
Elastic Modulus  
Poisson’s Ratio  
Thermal Conductivity 2 BTU-in/hr-ft^2 °F
Flammability Ratings VO
Magnetic No
Details
Advertised Thickness .250″ | 6.35mm
Gauge N/A
Thickness Tolerance Positive .022″
Thickness Tolerance Negative .022″
Cutting Process Waterjet
Cut Tolerance .009″
Available Operations
Deburring No
Bending No
Tapping N0
Powder Coating No
Hardware No
Design Considerations
Min Part Size 1″ x 2″
Max Part Size 46″ x 30″
Min Hole Size .070″
Min Bridge Size .250″
Tab and Slot Tolerance .030″
Properties
Material Composition G10 is a thermoset resin formed by the polymerization of phenol and formaldehyde, which can then be impregnated with glass cloth material to form an industrial laminate.
Density 112.32 lb/ft^3
Tensile Strength (Yield) Lengthwise: 45 ksi
Crosswise: 38ksi
Shear Strength Lengthwise: 75 ksi
Crosswise: 65 ksi
Comprehensive Strength 65 ksi
Flexural Modulus Lengthwise: 2.7 ksi
Crosswise: 2.4 ksi
Isod Impact (Notched), ft-lb/in Lengthwise: 13 ksi
Crosswise: 14 ksi, 12 ksi
Rockwell Hardness M110
Elastic Modulus  
Poisson’s Ratio  
Thermal Conductivity 2 BTU-in/hr-ft^2 °F
Flammability Ratings VO
Magnetic No
Details
Advertised Thickness .375″ | 9.53mm
Gauge N/A
Thickness Tolerance Positive .046″
Thickness Tolerance Negative .046″
Cutting Process Waterjet
Cut Tolerance .009″
Available Operations
Deburring No
Bending No
Tapping N0
Powder Coating No
Hardware No
Design Considerations
Min Part Size 1″ x 2″
Max Part Size 46″ x 30″
Min Hole Size .070″
Min Bridge Size .375″
Tab and Slot Tolerance .050″
Properties
Material Composition G10 is a thermoset resin formed by the polymerization of phenol and formaldehyde, which can then be impregnated with glass cloth material to form an industrial laminate.
Density 112.32 lb/ft^3
Tensile Strength (Yield) Lengthwise: 45 ksi
Crosswise: 38ksi
Shear Strength Lengthwise: 75 ksi
Crosswise: 65 ksi
Comprehensive Strength 65 ksi
Flexural Modulus Lengthwise: 2.7 ksi
Crosswise: 2.4 ksi
Isod Impact (Notched), ft-lb/in Lengthwise: 13 ksi
Crosswise: 14 ksi, 12 ksi
Rockwell Hardness M110
Elastic Modulus  
Poisson’s Ratio  
Thermal Conductivity 2 BTU-in/hr-ft^2 °F
Flammability Ratings VO
Magnetic No

Common Uses

  • Trap springs
  • Snap springs
  • S-Tines
  • Shims
  • Clamps
  • And so much more!

Our G10/FR-4 steel is guaranteed

We guarantee awesome quality parts. If you’re not 100% happy, we’ll give you a refund or remake on the spot – no questions, no hassle.

Plastic, composite, and wood materials cut on our CNC machine will have small tabs.

These tabs hold your parts in place while being cut to ensure the best accuracy possible. Click below to learn what to expect and how to best design with these tabs in mind.

Material Charts and Guidelines

Min/Max Part Sizes

VIEW

Processing Min/Max Part Sizes

VIEW

Density Guidelines

VIEW

Design Guidelines

VIEW

Start your first SendCutSend project today!

Upload your CAD design (DXF, DWG, EPS, or AI file) and get a free instant quote on your custom laser cut parts, all delivered to your door in a matter of days.