Sell borosilicate glass tube

详情

borosilicate glass tube
Physical data 
 

No.	Physics performance	Numerical Value	Unit
1	coefficient of mean linear thermal expansion(*0ºC;**0 ºC)	3.3±0.1	***6 K*1
2	Transformation Temperature	**5±*5	ºC
3	Softening point	**0±*0	ºC
4	Working point	***0±*0	ºC
5	Density at *0ºC	2.*3±0.2	g/cm2
6	Mean thermal conductivity(*0ºC***0ºC)	1.2	W/m.K
7	Refractive Index	0.*2	l

Chemical Composition in approximate weight %( main components)
 

Item .	SiO2	B2O3	AL2O3	Na2O +K2O
%	*1	*3	2	3.*8

                                                                           
Chemical Data:
Hydrolytic resistance at *8ºC          ISO***-HGB 1
Hydrolytic resistance at **1ºC         ISO***-HGB 1
water resistance                       Grade 1              Test method: ISO***6
Acid resistant Class                   Grade 1              Test method: ISO***6