Borosilicate triangular rod, glass rod, triangular rod, square rod 1.Borosilicate triangular rod 2.OD from 4mm-50mm

Physical Property
No.	Physical performance	Numerical Value	Unit
1	Coefficient of mean linear thermal expansion(20°C,300°C)	3.3±0.1	10-6K-1
2	Transformation temperature	525±15	°C
3	Softening point	820±10	°C
4	Working point	1260±20	°C
5	Density at 20°C	2.23±0.02	g/cm3
6	Mean thermal conductivity(20°C-100°C)	1.2	w/m2k
7	Refractive index	0.92	1

Main Composition
SiO2	B2O3	Na2O+K2O	Al2O3
81	13	4	2

Chemical Property
Hydrolytic resistance at 98°C	ISO719-HGB 1
Hydrolytic resistance at 121°C	ISO720-HGA 1
Acid resistance Class	ISO1776-First Class

Borosilicate triangular rod