Gas cylinder tube is a kind of seamless steel pipe and also a kind of alloy steel pipe. It is mainly used to make gas storage tanks, accumulators and other high pressure gas vessels. Because of our sophisticated technology and heat treatment equipment, our gas cylinder tube absolutely has overwhelming advantages than similar products in quality and properties, and can be in extreme small wall thickness. the common specifications of small wall thickness tube is 273mm*6.5mm, 325mm*7mm, 356mm*7.8mm, and 406mm*9mm.
Specification
| Standard | EN 10297 |
| Grade | 38Mn6, 30CrMo4, 34CrMo4 |
| Thickness | 2.9 – 60 mm(Sch10~Sch XXS) |
| Outer Diameter | 38 – 720 mm (2.75’’-28 ‘’) |
| Length | 5.8-12m or OEM |
| End | PE or BE |
| Packing | Plastic cap or bundling |
| Surface Treatmengt | Black paint,3LPE,3LPP,FBE or OEM |
| Section Shape | Round |
| Technique | Seamless hot rolled |
| Brand Name | Baotou Steel |
| Application | Used to make gas cylinders, bottles and other gas vessels |
| Place of Origin | China |
| MOQ | 25 ton |
| Transportation | 1.Sea port:Tianjin Xingang port,Qingdao port,Shanghai Luojing port →America,Europe,Africa,Middle East,India, Pakistan,Japan,Korea, Australia…(shipping) 2.Land port:Alataw pass port(Пограничный пункт “Алашанькоу”) |
| Chemical composition in % by mass | |||||||||||||||
| Steel grade | C | Si | Mn | P | S | Cr | Mo | Ni | |||||||
| Steel name | Steel | min | max | min | max | min | max | max | max | min | max | min | max | min | max |
| number | |||||||||||||||
| 38Mn6 | 1.1127 | 0,34 | 0,42 | 0,15 | 0,35 | 1,40 | 1,65 | 0,035 | 0,035 | – | – | – | – | – | – |
| 30CrMo4 | 1.7216 | 0,27 | 0,34 | – | 0,35 | 0,35 | 0,60 | 0,035 | 0,035 | 0,80 | 1,15 | 0,15 | 0,30 | – | – |
| 34CrMo4 | 1.722 | 0,30 | 0,37 | – | 0,40 | 0,60 | 0,90 | 0,035 | 0,035 | 0,90 | 1,20 | 0,15 | 0,30 | – | – |
| Classification of steel grades and delivery condition | |||
| Steel grade | Steel number | Nominal delivery condition | Classification in accordance with EN 10020 |
| 38Mn6 | 1.1127 | +N or +QT | Non-alloy special steel |
| 30CrMo4 | 1.7216 | +QT | Alloy special steel |
| 34CrMo4 | 1.722 | ||
| Mechanical properties for tubes made of steels in accordance with the delivery condition +QT | |||||||||||||||||
| Steel grade | Minimum tensile properties | ||||||||||||||||
| Steel name | Steel number | Yield strength (ReH) | Tensile strength ( Rm) | A% | |||||||||||||
| MPa | MPa | ||||||||||||||||
| For T in mm | For T in mm | For T in mm | |||||||||||||||
| ≤ 8 | > 8 | > 20 | > 50 | ≤ 8 | > 8 | > 20 | > 50 | ≤ 8 | > 8 | > 20 | > 50 | ||||||
| ≤ 20 | ≤ 50 | ≤ 80 | ≤ 20 | ≤ 50 | ≤ 80 | ≤ 20 | ≤ 50 | ≤ 80 | |||||||||
| l | t | l | t | l | t | l | t | ||||||||||
| 38Mn6 | 1.1127 | 620 | 570 | 470 | 400 | 850 | 750 | 650 | 550 | 13 | 11 | 14 | 12 | 15 | 13 | 16 | 14 |
| 30CrMo4 | 1.7216 | 750 | 630 | 520 | 480 | 950 | 850 | 750 | 700 | 12 | 10 | 13 | 11 | 14 | 12 | 15 | 13 |
| 34CrMo4 | 1.722 | 800 | 650 | 550 | 500 | 1000 | 900 | 800 | 750 | 11 | 9 | 12 | 10 | 14 | 12 | 15 | 13 |
| NOTE l = longitudinal, t = transverse. | |||||||||||||||||
