четкие плавленого кварца труб

clear fused quartz tubes: low content in OH, high purity, good spectral transmission, well controlled dimensionmain size OD:between 2 & 160mm WT:between 0.6 & 5.0mm L:between 500 & 3000mm 3.it is used in stream line production 4.dinmension tolerance Range of OD OD WT Siding Out of round Bow/1220mm at most 6mm 2.0%more or less 10%more or less 12% 2.0% 2.5mm between 6.00 & 15.00mm 1.25%more or less 8%more or less 10% 1.5% 2.5mm between 15.00 & 20.00mm 1.25%more or less 10%more or less 15% 1.5% 2.5mm between 20.00 & 25.00mm 1.25%more or less 10%more or less 15% 1.5% 3.0mm between 25.00 & 30.00mm 1.35%more or less 12%more or less 15% 1.5% 3.0mm between 30.00 & 80.00mm 1.5%more or less 14%more or less 15% 2.0% 3.0mm 5.chemical composition Cr Ge Fe Mg Ti Ca Al Na Li K 0.1 0.4 1.5 0.4 0.1 0.8 16 2.3 0.5 2.0 6.spectral transmission at 1.0mm thickness Nm at most 220 255 280 315 350 380 590 780 % 89 91 93 93 93 93 93.2 93.4 7.physical properties Density 20°Ckg/m3 2.2 Coefficient of expansion between 25 & 300°C/°C 0.58 Softening point(centigrade) 1670 Annealning point(centigrade) 1210 Strain point(centigrade) 1110 Youngs Modulus 7.3×105