High-pressure gas cylinder steel pipe
This pipe is used in manufacturing seamless steel gas cylinders, automotive CNG cylinders and composite cylinders. It provides excellent hot rolled thin-walled seamless steel pipe for tube-type bottle. This high-pressure gas cylinder pipe has such features: quality inside and outside surface; uniform wall thickness; light mass; high productivity and yield and low cost, etc. It has been applied in seamless tube-type bottle bottom closing in key technology, adopting the gas cylinder pipe manufacture from punching drawing billet to thin-walled seamless steel pipe production. And this change is welcomed by users and has been an trend.
• Accumulator steel pipe used in hydraulic accumulator and energy storage pressure vessel housing.
• Vehicle large gas cylinder steel pipe used in vehicle large diameter gas cylinder.
Vehicle large gas cylinder steel pipe
Accumulator steel pipe
High-pressure gas cylinder steel pipe
| O.D（mm） |
70 |
89 |
102 |
108 |
114 |
121 |
123 |
127 |
140(139.7) |
|
| W.T（mm） |
4.5－7.0 |
4.5－8.0 |
4.5－10.0 |
4.5－10.0 |
4.5－10.0 |
4.5－10.0 |
4.5－12.0 |
4.5－12.0 |
4.5－12.0 |
|
| O.D（mm） |
146 |
152(152.4) |
165 |
168 |
178 |
180 |
182 |
194 |
204 |
|
| W.T（mm） |
4.5－12.0 |
4.5－12.0 |
5.0－12.0 |
5.0－14.0 |
5.5－15.0 |
5.5－15.0 |
5.5－15.0 |
5.5－15.0 |
5.5－15.0 |
|
| O.D（mm） |
229 |
232 |
245 |
255 |
262 |
267 |
273 |
279 |
356 |
|
| W.T（mm） |
5.5－14.0 |
6.0-18.0 |
8.0－20.0 |
7.5－30.0 |
7.5－30.0 |
7.5－30.0 |
7.5－30.0 |
7.5－30.0 |
8.5-36 |
|
| O.D（mm） |
406 |
559 |
610 |
630 |
711 |
|
|
|
|
|
| W.T（mm） |
8.5-38.0 |
16-27.0 |
18-30.0 |
18-30.0 |
18-45 |
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
| Grade |
Chemical Analysis（％） |
| C |
Si |
Mn |
P |
S |
Cr |
Ni |
Cu |
Mo |
V |
| 30CrMo |
0.26-0.34 |
0.17-0.37 |
0.40-0.70 |
≤0.025 |
≤0.025 |
0.80～1.10 |
|
≤0.20 |
0.15～0.25 |
— |
| 34CrMo4 |
0.32～0.39 |
0.17-0.37 |
0.40-0.70 |
≤0.025 |
≤0.035 |
0.80～1.10 |
|
≤0.20 |
0.15～0.25 |
— |
| 37Mn/1 |
0.36～0.40 |
0.17-0.37 |
1.50-1.70 |
≤0.025 |
≤0.025 |
≤0.30 |
|
≤0.20 |
— |
— |
| 37Mn/2 |
0.34～0.38 |
0.17-0.37 |
1.45-1.70 |
≤0.025 |
≤0.025 |
≤0.30 |
|
≤0.20 |
— |
— |
| 37Mn/3 |
0.30-0.37 |
0.17-0.37 |
1.40-1.75 |
≤0.025 |
≤0.025 |
≤0.30 |
≤0.30 |
≤0.20 |
≤0.10 |
0.07-0.12 |
| |
|
|
|
|
|
|
|
|
|
|
| Heat Treatment |
|
| Grade |
Kind |
Normalizing ℃ |
Cooling |
Tempering ℃ |
Cooling |
T.S.（MPa） |
Y.S.（MPa） |
Elongation（％） |
Impact Test Akv（J） |
|
| 30CrMo |
Q |
890±10 |
Water Cooling |
650±10 |
Air Cooling |
780 |
660 |
16 |
55 |
|
| 34CrMo4 |
Q |
880±10 |
Water Cooling |
635±10 |
Air Cooling |
890 |
755 |
16 |
55 |
|
| 37Mn/1 |
N |
840±10 |
Water Cooling |
|
|
730 |
520 |
16 |
30 |
|
| 37Mn/2 |
N& Q |
840±10 |
Water Cooling |
600±10 |
Air Cooling |
730 |
610 |
16 |
55 |
|
| 37Mn/3 |
N |
870±10 |
Water Cooling |
|
|
730 |
520 |
16 |
30 |
|
Standard
GB 18248, JIS G3429, EN 10083, DIN17200+Technical Agreement
ASTM A519 —Seamless Carbon and Alloy Steel Mechanical Tubing 37Mn, 34CrMo4
Cylinder tubes conforming to DIN 10305-1 seamless
Cylinder tubes DOM conforming to DIN 10305-2 welded
Cylinder tubes DOM conforming to ASTM A 513 welded
Cylinder tubes made of stainless steel Cylinder tubes conforming to DIN 2448
