尺寸公差Dimensional Tolerance
|
外径范围
Range of OD
|
外径
OD
|
壁厚
WT
|
偏壁度
Siding
|
椭圆度
Out of Round
|
弯曲度
Bow/1220mm
|
|
≤6mm
|
±2.0%
|
±10%
|
12%
|
2.0%
|
2.5mm
|
|
6.00-15.00mm
|
±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
|
化学成份 Chemical composition 单位：unit : ppm
|
铬Cr
|
锗Ge
|
铁Fe
|
镁Mg
|
钛T i
|
钙Ca
|
铝Al
|
钠Na
|
锂Li
|
钾K
|
羟基OH
|
|
<0.5
|
<0.4
|
1.5
|
0.5
|
2.5
|
2.3
|
2.5
|
2.5
|
036
|
2.5
|
1—50
|
物理性能：Physical Properties
|
密度 Density 20℃ kg*m-3(×103)
|
2.2
|
|
热膨胀系数 Coefficient of expansion 25-300℃ ℃-1(×10-6)
|
0.58
|
|
软化点 Softening point（℃）
|
1620
|
|
退火点 Annealing point（℃）
|
1160
|
|
变形点 Strain point(℃)
|
1060
|
|
杨氏模量 Youngs modulus(Pa)
|
7.3×105
|
光在1.0mm厚处的透过率 Spectral Transmission at 1.0mm thickness
|
Nm
|
<220
|
230-280
|
290-330
|
315
|
350
|
380
|
590
|
780
|
