Composite Properties

Advanced Composites are amazing materials. Be aware that the properties of many composites are dependent upon the direction of the fibers within the matrix as well as a variety of other variables. The table below is provided for reference purposes only.   If you are considering a project using composites and are not an experienced composite engineer, please contact us for more information.

Materials	Specific Gravity	Modulus (GPa)	Tensile Strength (MPa)	Ratio of Modulus to Weight (106 m)	Ratio of Tensile to Weight (103 m)	Yield Strength (MPa)
SAE 1010 Steel (cold worked)	7.87	207	365	2.68	4.72	303
AISI 4340 Steel	7.87	207	1722	2.68	2.3	1515
AL 6061-T6 Al Alloy	2.70	68.9	310	2.60	11.7	276
Ti-6AI-4v Titanium Alloy	4.43	110	1171	2.53	26.9	1068
17-7PH Stainless Steel	7.87	196	1619	2.54	31.0	1515
High strength carbon fiber-epoxy (unidirectional)	1.55	137.8	1550	9.06	101.9	Note: Yield only applies to alloys
High modulus carbon fiber-epoxy (unidirectional)	1.63	215	1240	13.44	77.5	Note: Yield only applies to alloys
E glass fiber-epoxy (unidirectional)	1.89	39.3	965	2.16	53.2	Note: Yield only applies to alloys
Kevlar® 49 epoxy - (unidirectional)	1.38	75.8	1378	5.60	101.8	Note: Yield only applies to alloys
Carbon fiber epoxy (quasi-isotropic)	1.55	45.5	579	2.99	38	Note: Yield only applies to alloys

Table Reference: “Effect of Defects on Mechanical Properties of Composites: Undergraduate Research on Materials”
Mir M. Atiqullah, Department of Mechanical Engineering Technology Southern Polytechnic State University 1100 South Marietta Parkway, Marietta GA 30060