The pipes are used almost in all fields of industry. Thanks to their variety of types and sizes, they can also be used for general purposes. The pipes are manufactured through hot rolling or cold drawing.
the diameters between 21,3 - 660 mm and with the wall thickness of up to 100 mm in the case of hot rolling, and with the diameters between 10,2 - 108 mm and the wall thickness of up to 12,5 mm in the case of cold drawing.
Mechanical properties | |||||||
| Pipe types | Steel grades | Upper yield limit Re min for wall thickness in mm min | Tensile strength Rm MPa | Elongation A% min | |||
ROUND SEAMLESS CARBON STEEL PIPES FOR SPECIAL REQUIREMENTS | 16 | 16 40 | 40 65 | 1 | t | ||
| St37.0 | 235 | 225 | 215 | 350-480 | 25 | 23 | |
| St44.0 | 275 | 265 | 255 | 420-550 | 21 | 19 | |
| St52.0 | 355 | 345 | 335 | 50-650 | 21 | 19 | |
CHEMICAL COMPOSITION (LADLE ANALYSIS) | ||||||
| Steel grades | Weld deoxidation type ( semi-killed steel only) RR special killed | C% | P% | S% | N% | Addition of nitrogen binding elements e.g. min 0,020% total Al |
| St37.0 | R | 0,17 | 0,040 | 0,040 | 0,009 | - |
| St44.0 | R | 0,21 | 0,040 | 0,040 | 0,009 | - |
| St52.0 | RR | 0,22 | 0,040 | 0,035 | - | YES |