Natural Cork AGG vs Natural Cork CR
Natural Material · Natural Cork temper comparison
Natural Cork AGG and Natural Cork CR are two conditions of the same natural material grade, Natural Cork: AGG (agglomerated (composition) cork, granules + resin binder) versus CR (cold rolled). The chemistry is identical, so every difference below comes from the condition. Natural Cork CR is the stronger of the two: tensile strength 3 MPa (0.363 ksi) against 0.8 MPa (0.116 ksi) for Natural Cork AGG, about 3.1 times as much. Natural Cork CR is the more ductile: elongation 25% versus 5% for Natural Cork AGG. Natural Cork AGG is lighter (0.25 g/cm³ vs 0.85 g/cm³ for Natural Cork CR) and Natural Cork CR is stiffer (0.03 GPa vs 0.03 GPa).
Natural Cork AGGChoose it when weight is the constraint.
Natural Cork CRChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
Natural Cork AGG vs Natural Cork CR: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all natural material grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all natural material grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Natural Cork AGGNatural Cork CR
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Elongation at Break
Compressive Strength
Flexural Strength
Same in both: Shear Modulus 0.01 GPa7.25×10⁻⁴ Msi · Bulk Modulus 0.01 GPa0 Msi · Poisson's Ratio 0.02 · Shear Strength 0.8 MPa0.12 ksi
Physical
Density and transition temperatures.
Density
Same in both: Porosity 88%
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Specific Heat Capacity 1,800 J/kg·K0.43 BTU/lb·°F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 1×10¹¹ Ω·m3.94×10¹⁸ µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Same in both: Polishability 10 / 100
Sustainability
Primary-production footprint per kilogram.
Typical Recycled Content
Same in both: Embodied Energy (primary production) 5 MJ/kg2,150 BTU/lb · Embodied Carbon (primary production) 0.3 kg CO₂/kg · Embodied Water 100 L/kg12 gal/lb
Strength versus weight
Yield strength against density for every natural material grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Natural Cork AGG vs Natural Cork CR — frequently asked
Is Natural Cork CR stronger than Natural Cork AGG?
Yes. Natural Cork CR has a typical tensile strength of 3 MPa (0.363 ksi) against 0.8 MPa (0.116 ksi) for Natural Cork AGG — about 3.1 times as much.
Which condition does FabDigit quote by default, AGG or CR?
Specify the condition in the material field or the drawing note; FabDigit prices the quote for the state you call out.
Which is easier to machine, Natural Cork AGG or Natural Cork CR?
Natural Cork AGG, by a small margin. Both rate very good for machinability — 80/100 against 75/100 for Natural Cork CR.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Natural Cork AGG and Natural Cork CR side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.