A material's rated temperature is not a print's rated temperature
Filament heat-resistance figures usually describe the polymer, not the specific geometry, infill, and print quality of your part. A thin-walled part with sparse infill can soften or deform below a material's headline heat figure, especially under load at temperature. This screen starts from your stated service temperature, applies a working margin above it, and only flags a material as a comfortable fit when it clears that margin, rather than treating a headline number as a hard pass/fail line.
How the screen works
Each common desktop family carries a general planning heat ceiling, from roughly 55 C for PLA up to roughly 110 C for Nylon. Your stated service temperature is compared against these ceilings with a margin built in, since printing right at a material's limit leaves no room for real-world variation. Materials that clear with margin are presented as the best fit; materials that only barely clear are shown as a closer call. Sustained or repeated exposure is flagged separately, since a material that tolerates a brief spike may not tolerate hours of continuous heat at the same number.
Worked example
A part expected to sit near a 60 C service temperature, sustained rather than brief: PLA (roughly 55 C ceiling) and even PETG (roughly 75 C ceiling, but with less margin) are treated with caution, while ABS/ASA or Nylon clear with more comfortable margin, and the sustained-exposure flag pushes the recommendation toward the higher-margin option rather than the closest pass.
Limitations
This screen excludes unspecified long-term thermal behavior such as creep or repeated-cycle fatigue and is not a substitute for your material's own heat-deflection-temperature datasheet figure. Real part temperature (not ambient air temperature) is what matters, and a part near an unexpected heat source can run meaningfully hotter than assumed.