| 尺寸公差 Dimensional Tolerance (table I) |
|
外径范围
Range of 0D
|
外径
0D
|
壁厚
WT
|
偏壁度
Siding
|
椭圆度
Out of Round
|
弯曲度
Bow/1220mm
|
|
≤6mm
|
±20％
|
±10％
|
12％
|
2.0％
|
2.5mm
|
|
6.0-15.00m
|
±1.25％
|
±8％
|
10％
|
1.5％
|
2.5mm
|
|
15.00-20.00mm
|
±1.25％
|
±10％
|
15％
|
1.5％
|
2.5mm
|
|
20.00-25.00mm
|
±1.25％
|
±10％
|
15％
|
1.5％
|
3.0mm
|
|
25.00-30.00mm
|
±1.35％
|
±12％
|
15％
|
1.5％
|
3.0mm
|
|
29.00-38.00mm
|
±1.35％
|
±12％
|
15％
|
1.5％
|
3.0mm
|
|
|
单位/化学成分及羟基含量 Chemical composition&OH (table II)
|
|
铬Cr
|
锗Ge
|
铁Fe
|
镁Mg
|
钛Ti
|
钙Ca
|
铝Al
|
钠Na
|
锂Li
|
钾K
|
羟基OH
|
|
20
|
0.4
|
1.5
|
0.4
|
100
|
1.0
|
16
|
2.3
|
0.5
|
2.0
|
＜25
|
|
|
物理性能 Physical Properties (table III)
|
| 密度 Density 20℃ kg．m-3(×103) |
2.2
|
| 热膨胀系数 Coefficient of expansion 25-300℃ c-1(×10-6) |
0.56
|
| 软化点 Softening point(℃) |
1630
|
| 退火点 Annealning point(℃) |
1180
|
| 变形点 Strain point(℃) |
1100
|
| 杨氏模量 Youngs modulus(pa) |
7.3×105
|
|
|
光在1.0mm厚处的透达率 Spectral Transmission at 1.0mm Thickness (table IV)
|
|
nm
|
＜220
|
230-280
|
290-330
|
350
|
450
|
550
|
590
|
780
|
|
％
|
0
|
＜15
|
0
|
15
|
88
|
92
|
93
|
93
|
|
