Amorphous Graphite vs MG Carbon Brush
Ceramic · grade comparison
Amorphous Graphite and MG Carbon Brush are both ceramic grades. MG Carbon Brush is the stronger of the two: tensile strength 20 MPa (2.9 ksi) against 5 MPa (0.725 ksi) for Amorphous Graphite, about 4.0 times as much. Amorphous Graphite is harder — 15 HV against 12 HV for MG Carbon Brush — which matters for wear surfaces and threads. Amorphous Graphite is lighter (2.25 g/cm³ vs 3.6 g/cm³ for MG Carbon Brush) and MG Carbon Brush is stiffer (13 GPa vs 7 GPa). On the shop floor, Amorphous Graphite sits in a lower cost tier (budget, $) than MG Carbon Brush (high, $$$$).
Amorphous GraphiteChoose it when surface hardness matters, or when weight is the constraint.
MG Carbon BrushChoose it when strength drives the design.
Amorphous Graphite vs MG Carbon Brush: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all ceramic 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 ceramic 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.
Amorphous GraphiteMG Carbon Brush
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Elongation at Break
Compressive Strength
Flexural Strength
Shear Strength
Fracture Toughness (K_IC)
Hardness, Vickers
Poisson's Ratio
Same in both: Hardness, Mohs 1.5
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Porosity
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Min Service Temperature
Electrical
Conductivity and insulation.
Electrical Resistivity
Volume Resistivity
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
Polishability
Sintering / Firing Temperature
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Thermal Diffusivity
Thermal Shock Resistance Index
Strength versus weight
Yield strength against density for every ceramic grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | Amorphous Graphite | MG Carbon Brush |
|---|---|---|
| Default condition | — | — |
| Relative cost | $ Budget | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Amorphous Graphite vs MG Carbon Brush — frequently asked
Is MG Carbon Brush stronger than Amorphous Graphite?
Yes. MG Carbon Brush has a typical tensile strength of 20 MPa (2.9 ksi) against 5 MPa (0.725 ksi) for Amorphous Graphite — about 4.0 times as much.
Which is cheaper, Amorphous Graphite or MG Carbon Brush?
Amorphous Graphite is the lower-cost material: it sits in the budget tier ($) while MG Carbon Brush is high ($$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, Amorphous Graphite or MG Carbon Brush?
Amorphous Graphite, by a small margin. Both rate excellent for machinability — 90/100 against 85/100 for MG Carbon Brush.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Amorphous Graphite and MG Carbon Brush 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.