What kind of seamless steel pipe is the grade 34CrMo4?
34CrMo4 is a chromium-molybdenum steel alloy material, which is mainly used to produce seamless steel pipe materials for rolling high-pressure gas cylinders/cylinders and high-pressure vessels.
Chemical composition of 34CrMo4 material: C: 0.30~0.37 Si: ≤0.40 Mn: 0.60~0.90 P, S: ≤0.020 P+S: ≤0.030 Cr: 0.90~1.20 Mo: 0.15~0.30 Ni: ≤0.30 Cu: ≤0.20
General implementation standards for seamless steel pipes for 34CrMo4 gas cylinders: national standard GB/T 18248-2021, Japanese standard JIS G 3429, international standard ISO 11120, European standard EN 10297-1, American standard ASTM A372/A372M-3
Mechanical properties of 34CrMo4 gas cylinder tube: tensile strength after heat treatment ≥980Mpa, yield strength ≥835Mpa, elongation after break ≥12%, -50° low temperature impact energy ≥27J.
34CrMo4 gas cylinder tubes are generally delivered in a rolled or cold-drawn state. They are cut and processed into gas cylinders or steel cylinders and then heat treated and tempered.
The main conventional sizes of seamless steel pipes for 34CrMo4 gas cylinders are: 108*4, 114*4, 139.7*4, 139.7*4.5, 139.7*5, 140*4, 140*4.5, 140*5, 203*5.3, 203* 5.4, 229*5.3, 229*5.8, 232*5.3, 232*5.4, 267*5.7, 279*6.5, 279*6.8, 279*6, 316*7, 325*7.1, 325*7, 340*16.8, 355.6*7.2, 355.6*7.4, 355.6*7.5, 356*7.2, 356*7.4, 356*7.5, other sizes can also be customized.
Main uses of 34CrMo4 seamless steel pipe: Mainly used in the manufacture of CNG cylinders (compressed natural gas cylinders for vehicles, and the manufacture of other high-pressure container cylinders.
