The question

A housing needs impact strength and a flame-retardant classification. Is a flame rating on the data sheet enough to select the grade?

Quick answer

No. Flame performance is linked to tested thickness, color, specimen condition and certification scope. The molded-part design and the customer’s end-use standard must be confirmed before a grade is shortlisted.

Check first

Information that changes the recommendation

  • Target standard and required classification at the real wall thickness
  • Operating temperature, heat-aging requirement and electrical environment
  • Drop, impact and assembly loads on the finished enclosure
  • Surface appearance, color, laser marking and painting requirements
  • Injection machine, gate design, flow length and expected cycle window
Practical guidance

Use the thinnest critical wall as the selection reference rather than the nominal wall thickness.

Compare candidates only after confirming whether the stated listing covers the required thickness and color family.

Validate flame, impact and aging performance on representative molded parts. Certification documents and batch-specific compliance should be confirmed for the selected commercial grade.