GB 18248 Seamless Steel Tubes for Gas Cylinder
Our GB 18248 seamless steel tubes are specifically designed and manufactured to meet the demanding requirements of the Chinese national standard GB 18248 for seamless steel tubes for gas cylinders. Made from high-strength, low-alloy steel, these tubes provide excellent mechanical properties, including high tensile strength, yield strength, and elongation at break, making them ideal for use in the manufacture of gas cylinders and other high-pressure containers. The tubes undergo a rigorous manufacturing process that includes strict quality control measures to ensure dimensional accuracy, surface finish, and chemical composition meet the required standards. With their excellent corrosion resistance and ability to withstand extreme temperatures, our GB 18248 seamless steel tubes are widely used in various industries, including the manufacture of LPG cylinders, oxygen cylinders, and industrial gas cylinders.
Chemical Composition of GB 18248 Seamless Steel Tubes for Gas Cylinder
| Steel Grade |
C (%) |
Si (%) |
Mn (%) |
P (max %) |
S (max %) |
Cr (%) |
Mo (%) |
Ni (%) |
V (%) |
Other Elements |
| 37Mn |
0.34-0.41 |
0.15-0.35 |
1.20-1.60 |
0.025 |
0.015 |
– |
– |
– |
– |
– |
| 34Mn2V |
0.30-0.38 |
0.15-0.35 |
1.20-1.60 |
0.025 |
0.015 |
– |
– |
– |
0.08-0.15 |
– |
| 30CrMo |
0.28-0.34 |
0.15-0.35 |
0.40-0.70 |
0.025 |
0.015 |
0.80-1.10 |
0.15-0.25 |
– |
– |
– |
| 35CrMo |
0.32-0.40 |
0.15-0.35 |
0.40-0.70 |
0.025 |
0.015 |
0.80-1.10 |
0.15-0.25 |
– |
– |
– |
| 34CrMo4 |
0.32-0.39 |
0.17-0.37 |
0.50-0.80 |
0.025 |
0.015 |
0.90-1.20 |
0.15-0.30 |
– |
– |
– |
| 30CrMnSiA |
0.27-0.34 |
0.17-0.37 |
0.80-1.10 |
0.025 |
0.015 |
0.80-1.10 |
– |
– |
– |
0.80-1.10 |
Mechanical Properties of GB 18248 Seamless Steel Tubes for Gas Cylinder
| Steel Grade |
Heat Treatment |
Tensile Strength (MPa) |
Yield Strength (MPa) |
Elongation (%) |
Reduction of Area (%) |
Impact Energy (J) |
| 37Mn |
Quenched & Tempered |
830-980 |
≥630 |
≥12 |
≥40 |
≥47 |
| 34Mn2V |
Quenched & Tempered |
850-1000 |
≥630 |
≥12 |
≥40 |
≥47 |
| 30CrMo |
Quenched & Tempered |
930-1080 |
≥835 |
≥12 |
≥50 |
≥47 |
| 35CrMo |
Quenched & Tempered |
930-1080 |
≥835 |
≥12 |
≥50 |
≥47 |
| 34CrMo4 |
Quenched & Tempered |
930-1080 |
≥835 |
≥12 |
≥50 |
≥47 |
| 30CrMnSiA |
Quenched & Tempered |
930-1080 |
≥835 |
≥12 |
≥50 |
≥47 |
Specifications
| Standard |
GB 18248 Seamless Steel Tubes for Gas Cylinder |
| Steel Grade/Material |
34CrMo4, 35CrMo, 30CrMo, 37Mn, 34Mn2V, 30CrMnSiA |
| OEM service |
Provide |
| Outer Diameter(OD) |
38mm-720mm |
| Wall Thickness(WT) |
2.6mm-60mm |
| Length |
5.8-16m or OEM |
| Packing |
Plain Ends, Bundled or Loosely Packed |
| Surface Treatment |
Bare |
| Section Shape |
Round |
| Technique |
Seamless hot rolled/cold-drawn/thermal expanded |
| Place of Origin |
Made in China |
| MOQ |
25 ton/size |
| Transportation |
Land transportation by truck or train, sea transportation by container ship or bulk ship. |
Applications of GB 18248 Seamless Steel Tubes for Gas Cylinder
Industrial Applications
Gas Storage and Transportation: Used for storing and transporting industrial gases such as oxygen, nitrogen, argon, hydrogen, and carbon dioxide.
Welding and Cutting: Utilized in gas cylinders for welding and cutting operations, where gases like acetylene and oxygen are essential.
Chemical Processing: Employed in the storage and transportation of gases used in chemical manufacturing and processing.
Medical Applications
Medical Gas Supply: Used in cylinders for storing medical gases such as oxygen, nitrous oxide, and medical air for hospitals and healthcare facilities.
Home Healthcare: Provides portable oxygen cylinders for patients requiring oxygen therapy at home.
Food and Beverage Industry
Carbonation: Utilized in the storage of carbon dioxide for carbonating beverages.
Food Preservation: Used for gases like nitrogen in food packaging to extend shelf life and maintain product freshness.
Energy Sector
Compressed Natural Gas (CNG) Storage: Used in CNG cylinders for vehicles and fueling stations.
Liquefied Petroleum Gas (LPG) Storage: Employed in LPG cylinders for domestic and industrial use.
Firefighting Equipment
Breathing Apparatus: Used in cylinders for self-contained breathing apparatus (SCBA) for firefighters.
Fire Suppression Systems: Utilized in gas cylinders for fire suppression systems using gases like CO2 and inert gases.
Aerospace and Defense
Aircraft Systems: Used in oxygen cylinders for aircraft crews and passengers.
Military Applications: Employed in various military equipment requiring high-pressure gas storage.
Recreational Activities
Scuba Diving: Used in scuba tanks for underwater breathing.
Paintball: Utilized in paintball gun cylinders for propellant gas.
Research and Development
Laboratory Use: Used in gas cylinders for various laboratory experiments and processes requiring high-purity gases.
Testing and Calibration: Employed in calibration of gas cylinders for testing and calibration of instruments and equipment.
