GB18248 34CrMo4 30CrMnSiA Seamless Steel Tubes For Gas Cylinder
GB18248 34CrMo4 30CrMnSiA Seamless Steel Tubes for Gas Cylinder
Products Description:
GB18248 34CrMo4 30CrMnSiA Seamless Steel Tubes for Gas Cylinder
Well-finished inside and outside surface. Alloy Steel tubes and pipes.
Standard: GB18248 JIS G3429
Applications: for High Pressure Gas Cylinder
Size Range:
OD: 5-420mm WT: 0.5-50mm Length:4-12m
Relevant standard: KS D3573
The Steel Refining Method:
The steel is Killed steel refined in electric furance or oxygen converter.
The method of Steel Tube Manufacturing:
Hot rolled (expanding) or cold rolling (drawing)
Steel Grade and Chemical Component
| No. | Grade | Chemical componenet(quality fraction)/% | ||||||||||
| C | Si | Mn | P | Sb | P+Sb | Cr | Mo | V | Ni | Cu | ||
| 1 | 37Mna | 0.34~ 0.40 | 0.10~ 0.30 | 1.35~ 1.75 | ≤0.020 | ≤0.020 | ≤0.030 | ≤0.30 | - | - | ≤0.30 | ≤0.20 |
| 2 | 34Mn2V | 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 |
| 3 | 30CrMoa | 0.26~ 0.34 | 0.17~ 0.37 | 0.40~ 0.70 | ≤0.020 | ≤0.020 | ≤0.030 | 0.80~ 1.10 | 0.15~ 0.25 | - | ≤0.30 | ≤0.20 |
| 4 | 35CrMoa | 0.32~ 0.40 | 0.17~ 0.37 | 0.40~ 0.70 | ≤0.020 | ≤0.020 | ≤0.030 | 0.80~ 1.10 | 0.15~ 0.25 | - | ≤0.30 | ≤0.20 |
| 5 | 34CrMo4a,c | 0.30~ 0.37 | ≤0.40 | 0.60~ 0.90 | ≤0.020 | ≤0.020 | ≤0.030 | 0.90~ 1.20 | 0.15~ 0.30 | - | ≤0.30 | ≤0.20 |
| 6 | 30CrMnSiA | 0.28~ 0.34 | 0.90~ 1.20 | 0.80~ 1.10 | ≤0.020 | ≤0.020 | ≤0.030 | 0.80~ 1.10 | ≤0.10 | - | ≤0.30 | ≤0.20 |
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