JIS A9521 XPS vs XPS 300
Polymer · grade comparison
JIS A9521 XPS and XPS 300 are both polymer grades. XPS 300 is the stronger of the two: tensile strength 0.45 MPa (0.0653 ksi) against 0.4 MPa (0.058 ksi) for JIS A9521 XPS, about 12% more. XPS 300 is the more ductile: elongation 3% versus 2% for JIS A9521 XPS. JIS A9521 XPS is lighter (0.03 g/cm³ vs 0.04 g/cm³ for XPS 300) and XPS 300 is stiffer (0.02 GPa vs 0.01 GPa). On the shop floor, XPS 300 welds better (poor vs not recommended).
JIS A9521 XPSChoose it when weight is the constraint.
XPS 300Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
JIS A9521 XPS vs XPS 300: 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.
Elastic (Young's) Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Elongation at Break
Compressive Strength
Compressive Modulus
Flexural Strength
Flexural Modulus
Shear Strength
Compression Set (22 h, 70 °C)
Yield Strength (0.2% offset)
Physical
Density and transition temperatures.
Density
Water Absorption (24 h)
Water Absorption (Saturation)
Same in both: Glass Transition (Tg) 100°C212 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Min Service Temperature
Limiting Oxygen Index
Vicat Softening Point (B50)
Same in both: Thermal Expansion (CTE, 20–100 °C) 70 µm/m·K38.9 µin/in·°F · Max Service Temperature (continuous) 75°C167 °F · Max Service Temperature (short-term) 85°C185 °F
Electrical
Conductivity and insulation.
Dielectric Constant (1 MHz)
Same in both: Electrical Resistivity 1×10¹⁴ Ω·m3.94×10²¹ µΩ·in · Volume Resistivity 1×10¹⁶ Ω·cm
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 85 / 100 · UV / Weathering Resistance 15 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Processing Melt Temperature (typ.)
Sustainability
Primary-production footprint per kilogram.
Embodied Carbon (primary production)
Typical Recycled Content
Embodied Water
Same in both: Embodied Energy (primary production) 100 MJ/kg42,992 BTU/lb
Common Calculations
Ratios derived from the values above.
Thermal Diffusivity
Same in both: Specific Strength (UTS / density) 13 kN·m/kg · Specific Stiffness (E / density) 0.4 MN·m/kg · 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 | JIS A9521 XPS | XPS 300 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$ Standard | $$ Standard |
| Min. machined wall | — | — |
| Best machined surface | — | — |
JIS A9521 XPS vs XPS 300 — frequently asked
Is XPS 300 stronger than JIS A9521 XPS?
Yes. XPS 300 has a typical tensile strength of 0.45 MPa (0.0653 ksi) against 0.4 MPa (0.058 ksi) for JIS A9521 XPS — about 12% more.
Which is cheaper, JIS A9521 XPS or XPS 300?
Both sit in the same relative cost tier ($$, standard); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, JIS A9521 XPS or XPS 300?
XPS 300. Its weldability rates poor (15/100) against not recommended (5/100) for JIS A9521 XPS.
Ready to make it?
Upload a CAD file and FabDigit prices the part in JIS A9521 XPS and XPS 300 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.