Table 1.

Mechanical property comparison of silk, natural, and synthetic fibers. Data obtained from ref. [3].

Material	Density (g/cm3)	Elongation at Break (%)	Strength (GPa)	Young’s Modulus (GPa)	Toughness (MJ/m3)
Dragline Silk, A. diadematus	1.3	27	1.1	10	180
Flag Silk, A. diadematus	1.3	270	0.5	0.003	150
Cocoon Silk, B. mori	1.3	18	0.6	7	70
Steel	7.8	0.8	1.5	200	6
Elastin	1.3	15	0.002	0.001	2
Carbon Fiber	1.8	1.3	4	300	25
Kevlar 49	1.4	2.7	3.6	130	50
Nylon 6,6	1.1	18	0.95	5	80
Wool (at 100% relative humidity)	1.3	50	0.2	0.5	60