EN 10120 P310NB is a carbon/low-alloy steel designated for welded gas cylinders under the European Standard (EN) system. It is primarily used as a structural material for cylinders in medium-pressure gas storage and transport. P310NB steel sheet and strip is widely applied in the industrial weled gas cylinder manufacturing sector due to its balanced overall performance and excellent weldability.

Carbon Equivalent of P310NB Steel Sheet and Strip for Welded Gas Cylinders: CEV ≤ 0.41%

Carbon equivalent (CEV) is calculated using the International Institute of Welding (IIW) formula:

CEV = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15

P310NB steel plates and strips are specifically designed for the manufacture of refillable welded steel gas cylinders and are widely used in:

1. Industrial gas cylinders: storing oxygen, nitrogen, argon, carbon dioxide, etc.

2. Medical gas cylinders: storing medical oxygen, nitrous oxide, etc.

3. Fire extinguisher bodies.

4. High-pressure air cylinders (e.g., for diving respirators, firefighting breathing apparatus).

5. Compressed natural gas (CNG) cylinders for vehicles.

International Equivalent Materials

* Equivalent materials are only approximations, mechanical properties and chemical composition must be compared during application design.

P310NB Steel Sheet and Strip for Welded Gas Cylinders is not suitable for the following scenarios:

1. High-pressure cylinders (design pressure > 30 MPa): Requires higher strength grades (such as P355NB, P460NB) or seamless cylinder steels;

2. Corrosive media: Such as chlorine, ammonia, acidic gases, etc. (Stainless steel or corrosion-resistant alloys must be used);

3. Low-temperature environments (< -20°C): Conventional P310NB impact energy only meets the requirement for 0°C. For low-temperature applications, specialized low-temperature cylinder steels (such as EN 10028-4 P355NL1) must be used.