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The ultimate tensile strength is the maximum stress that the material can withstand before breaking. The higher the tensile strength, the more resistant the material is to breaking. Results are reported in megapascals (MPa).

The Young's modulus is the slope of the stress-strain curve. The higher the Young's modulus, the more resistant the material is to deformation. Results are reported in pascals.

Cost normalized values are reported in units of megapascals (MPa) per dollar ($) per kilogram (kg). A higher cost-normalized value corresponds to a greater material strength per dollar. Costs were calculated using the price of the material at writing.

Some materials are susceptible to water absorption. Therefore, materials marked (Wet) were tested after long exposure to a wet environment. You can read more about the test method on my blog: https://blog.nathantsoi.com/article/3d-printer-material-tests.

The physical properties of certain materials can be improved by gently heating them over a long period of time in a process called annealing. Filaments marked with the (Annealed) tag were annealed according to the manufacturers instructions.

Sometimes you can't print a material immediately after opening the package. To test this, we printed some test coupons after leaving the roll of filament out in an open, humid environment. The time we left filaments varied. We tested some filaments by printing the coupon without drying in a filament dryer and with drying in a filament dryer. You can read more about the test method on my blog: https://blog.nathantsoi.com/article/3d-printer-material-tests.

Reported results are the average of 4 tests on each material performed at room temperature on ASTM D638 type V coupons printed for maximum strength with the layer lines parallel to the axis of the test. Materials that are susceptible to water absorption were tested both dry and wet. You can read more about the test method on my blog: https://blog.nathantsoi.com/article/3d-printer-material-tests.

At the time of writing, COEX offers a 10% discount on materials for my readers. Use this link or the coupon code NATVERT at checkout.

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