Strength and Toughness

Strength is not the same as Toughness

For example, glass has a high Tensile Strength, but it's not tough, because it shatters easily. Toughness relates to Impact Resistance.

Strength is needed in structural applications. With Plastics, as strength decreases, toughness often increases. This Table is for comparison only.

Plastic Type	Tensile Strength	Impact Resistance
PBI (Polybenzimidazole)	100	50
PAI (Polyamide-imide)	86	60
PEEK	79	45
PEI (Polyetherimide)	75	50
PETP	64	20
Nylon 66	64	90
PSU (Polysulphone)	57	50
Nylon GSM (MoS2 filled)	56	80
PETP TX	54	20
Nylon 6	54	95
PPS (Polyphenylene Sulphide)	54	50
Nylon 6 Oil Filled	50	70
Acetal Copolymer	49	70
PC (Polycarbonate)	45	100
Acrylic	43	20
Orkot (Marine)	43	90
PVC	39	20
PVDF (Polyviylidenefluoride)	36	100
PP (Polypropylene)	24	100
HMWPE (PE500)	20	100
PTFE (Virgin)	20	55
HDPE (Pipe Grade PE100)	17	100
HDPE (PE300)	16	60
UHMWPE (Fender)	16	100
UHMWPE (7000)	14	100