design guide

Properties in Balance

Choosing the correct material always involves tradeoffs in performance, as illustrated in the following chart. The key then is to determine and prioritize your part's most critical performance characteristics.

An improvement in... Usually improves... But sacrifices...
Abrasion resistance Hardness/Elongation Resilience
Impact resistance Elongation Modulus
Creep resistance Resilience Flex resistance
Oil resistance Tear resistance Low temperature flex
Resilience Creep resistance Tear resistance
Tensile strength Modulus Elongation
Vibration damping Impact resistance Structural integrity