GB/T 18248-2008 governs the production of 34Mn2V gas cylinder tubes. Manufacturers utilize these tubes mainly for industrial oxygen cylinders, nitrogen gas cylinders, and medical gas cylinders.

GB/T 18248-2008 governs the production of 34Mn2V gas cylinder tubes. Manufacturers utilize these tubes mainly for industrial oxygen cylinders, nitrogen gas cylinders, and medical gas cylinders.
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| Grade | C | Si | Mn | P | S | P+S | Cr | V | Ni | Cu |
| 37Mn | 0.30~0.37 | 0.17~0.37 | 1.40~1.75 | ≤0.020 | ≤0.020 | ≤0.030 | ≤0.30 | 0.07~0.12 | ≤0.30 | ≤0.20 |
| Grade | Tensile strength Rm | Yield strength YS | Elongation A(%) |
| 37Mn | ≥743Mpa | ≥530Mpa | ≥16 |


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