Choose standard PA12 (PA2200) for most technical parts: 45 MPa tensile, isotropic, broadly applicable. For tough or bending parts PA11 (54 MPa, 31% elongation). For stiff structural parts Carbon LW (56 MPa, 2x stiffer). For maximum strength PA802CF (89 MPa). For flexible or damping parts TPU 1301.
Match material to your load
Static tensile only (housings, cable management, non-flexing brackets) -> PA12. Most economical and predictable.
Repeated flex, snap-fits, hinges, impact -> PA11. 31% elongation makes it tough.
Structural stiffness, no deflection -> Carbon LW. Glass + carbon fibre, 2x stiffer than PA12.
Absolute maximum strength, metal replacement -> PA802CF. 89 MPa on PA11 base.
Flexible seals, dampers, grips -> TPU 1301. Shore A 86, rubber-like.
When you combine requirements
Often you want both strong and tough, or light and stiff. Rule of thumb: start with PA12 and step up as needed.
Something extra tough? Choose PA11 instead of fibre-reinforced. Often the toughness is enough and cost is lower. Heavy structural but no impact? Carbon LW is optimal. Heavy and possibly impacted? PA802CF combines PA11 toughness with carbon fibre strength.
For food contact and metal detection in a technical part: PA12 Blue MD, 49 MPa with FDA + EC1935/2004.
When you want a material consult
For most standard technical parts the choice is fairly obvious. On the fence between two materials, or your case has special requirements (temperature sensitivity, chemical exposure, UV, regulation)? Talk to an engineer.
We compare tensile, stiffness, elongation, thermal properties and cost for your specific design. Often there is a saving or performance gain you would have missed on your own.