BMC vs DAIP
Polymer · grade comparison
BMC and DAIP are both polymer grades. DAIP is the stronger of the two: tensile strength 55 MPa (7.98 ksi) against 42 MPa (6.09 ksi) for BMC, about 31% more. DAIP is the more ductile: elongation 0.6% versus 0.5% for BMC. DAIP runs hotter in service (205°C vs 150°C continuous) and BMC conducts heat better (0.6 W/m·K vs 0.42 W/m·K). On the shop floor, BMC sits in a lower cost tier (standard, $$) than DAIP (high, $$$$).
BMCChoose it when cost is the deciding factor.
DAIPChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
BMC vs DAIP: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all polymer 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 polymer 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.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Shear Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Elongation at Break
Compressive Strength
Compressive Modulus
Flexural Strength
Flexural Modulus
Shear Strength
Hardness, Rockwell M
Same in both: Elastic (Young's) Modulus 11 GPa1.6 Msi · Izod Impact, Notched 75 J/m1.4 ft·lbf/in
Physical
Density and transition temperatures.
Density
Glass Transition (Tg)
Water Absorption (24 h)
Water Absorption (Saturation)
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
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Limiting Oxygen Index
Max Service Temperature (short-term)
Electrical
Conductivity and insulation.
Electrical Resistivity
Dielectric Strength
Dielectric Constant (1 MHz)
Dissipation Factor (1 MHz)
Volume Resistivity
Surface Resistivity
Comparative Tracking Index (CTI)
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
UV / Weathering Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Polishability
Mold Shrinkage
Processing Melt Temperature (typ.)
Mold Temperature (typ.)
Same in both: Weldability 3 / 100 · Formability (cold) 3 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Same in both: Typical Recycled Content 0%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Thermal Diffusivity
Same in both: Thermal Shock Resistance Index 0
Strength versus weight
Yield strength against density for every polymer grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | BMC | DAIP |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$ Standard | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
BMC vs DAIP — frequently asked
Is DAIP stronger than BMC?
Yes. DAIP has a typical tensile strength of 55 MPa (7.98 ksi) against 42 MPa (6.09 ksi) for BMC — about 31% more.
Which is cheaper, BMC or DAIP?
BMC is the lower-cost material: it sits in the standard tier ($$) while DAIP 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, BMC or DAIP?
DAIP, by a small margin. Both rate fair for machinability — 40/100 against 35/100 for BMC.
Ready to make it?
Upload a CAD file and FabDigit prices the part in BMC and DAIP 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.