EP Tubes (electropolished tube) has stable chemical property, high pressure-proof ability, high strength widely used in special gas systems,medical devices,semi-conductor and liquid crystal industry.
一、Semiconductor Raw Material:
Ultra-Pure Stainless Steel AISI 316L
Principal Component Ratio(mass%)
| Smelting Method | (*ppm)Chemical composition of ultra-high purity materials | ||||||||||||
|
|
C |
Si |
S |
Mn |
P |
Cu |
Cr |
Ni |
Mo |
O* |
N* |
H* |
|
| SEMI F20 |
≤0.030 |
≤1.00 |
≤0.01 |
≤1.50 |
≤0.045 |
≤0.3 |
16.0～18.0 |
10.0～15.0 |
2.0～3.0 |
/ |
/ |
/ |
|
| (VIM+VAR) | SQ316L-Ⅰ |
0.005 |
0.2 |
0.001 |
0.6 |
0.003 |
0.010 |
17.7 |
14.80 |
2.70 |
8 |
30 |
1 |
| (VOD+VAR) | SQ316L-Ⅱ |
0.008 |
0.3 |
0.001 |
0.7 |
0.015 |
0.15 |
17.2 |
14.70 |
2.52 |
10 |
60 |
2 |
| (EAF+VOD+LF) | SQ316L-Ⅲ |
0.011 |
0.38 |
0.006 |
0.9 |
0.02 |
0.19 |
16.70 |
13.6 |
2.13 |
30 |
120 |
3 |
| (EAF+VOD) | SQ316L-Ⅳ |
0.021 |
0.42 |
0.007 |
0.9 |
0.02 |
0.25 |
16.15 |
10.08 |
2.13 |
40 |
150 |
5 |
Applications: Widely used in the manufacture of semiconductor products, ultra-high vacuum valve devices, filter housings and other stainless steels that require ultra-clean and ultra-low gas components.
( Key Technology: special smelting of VIM+VAR is used to reduce “non-metallic inclusion & gas composition ” in the production of materials .)
Nonmetallic Inclusions：
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Grade |
ASTM-D Method（Worst Thin） |
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0.5 1.0 1.5 2.0 2.5 (级) |
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SQ316L-Ⅰ |
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SQ316L-Ⅱ |
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SQ316L-Ⅲ |
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SQ316L-Ⅳ |
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二、 Bright Annealed Precision Tube
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