| 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 | |
