• 325mm 7mm EN 10297 hot rolled 38Mn6 seamless steel gas cylinder tube

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”)
Khorgos port(Пограничный пункт “Хоргос”)
→East Asia, Uzbekistan,Kazakhstan,Kyrgyzstan…(Train)
Erlianhot port→Mongolia(Train and Truck)
Manchuria port→Russia(Train and Truck)
                                                                                    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.

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