Table of equal-strength replacement of metal reinforcing bars of diameter of 8 mm with Glass-Fibre Reinforced Plastic Bars  of diameter of 6 mm

Metal reinforcing bars А-III (А400С) GOST 5781-82 Fibreglass Reinforced Plastic Bars TU 2292-001-11733958-2013
Material
Steel 35GS, 25G2S etc.
Fibreglass with a diameter of 13–16 microns bound by a polymer
D, mm
8
6
Breaking force (rated), N
18 108
23 360
Cross-section area, sq. mm
50,3
29,2
Weight per 1 lineal meter, kg
0,40
0,04
Quantity of lineal meters in 1 t
2 530
25 000
Tensile strength, MPa
390
860
Modulus of elasticity, MPa
200 000
55 000
Elongation, %
25
2,2
Thermal conductivity coefficient, W/(mºС)
46
0,35
Mode of behaviour under load (dependence "tension-deformation")
Curved line with yield strength under load
Straight line with elastic-linear dependence under load up to destruction
Linear expansion coefficient, αх10-5/ºС
13 - 15
9 - 12
Density, t/m³
7
1,9
Thermal conductivity
Thermally-conductive (56 W/m2)
Thermally non-conductive (0.48 W/m2)
Electrical conductivity
Electrically-conductive
Dielectric