DIN 1628 St44.4 welded steel tubes/pipes are predominantly used in the construction of chemical plants, vessels, pipework and for general mechanical engineering purpose. The St44.4 steel tubes of DIN1628 are designed to meet high performance requirements. Normally , there are no limiting values for the maximum permission working pressure of DIN 1628 St44.4 welded steel tubes. The permissible working pressure shall not exceed 300°C.
A welded tube conforming to DIN 1628 with an outside diameter of 114.3mm and a wall thickness of 3.2mm,made from St44.4 steel(material number 1.0257) in the normalized condition(N) SHALL BE DESIGNATED AS “Tube DIN1628- St44.4 N” or “Tube DIN1628- 1.0257 N”.
DIN1628 St 44.4 welded steel pipe chemical composition
| Chemical composition | ||||||||
| Steel grade | Type of deoxidation (RR.fully killed) | Chemical composition, % by mass | Addition of nitrogen fixing elements (e.g.no less than 0.020% Al total) | |||||
| Symbol | Material number | C | Si | Mn | P | S | ||
| max | max | |||||||
| St 44.4 | 1.0257 | RR | 0.20 | 0.35 | >=0.35 | 0.040 | 0.040 | Yes |
DIN1628 St 44.4 welded steel pipe mechanical property
| Steel grade | Upper yield stress Reh for wall thickness in mm | Tensile strength Rm N/mm2 | Elongation after fracture A5 | Impact energy ISO V-notch test pieces at+20°C | |||||
| Symbol | Material number | Up to 16 | 16-40 | 40-65 | longitudinal | transverse | longitudinal | transverse | |
| N/mm2 min | % min | / min | |||||||
| St 44.4 | 1.0257 | 275 | 265 | 255 | 420 to 550 | 21 | 19 | 43 | 27 |
Shanghai Katalor Enterprises Co., Ltd is a standard company specialized in producing and exporting DIN 1628 St44.4 welded steel tubes. At the same time, we can also manufacture the DIN 1628 ST37.4 steel pipe and DIN 1628 ST52.4 steel pipe. We have our own St44.4 welded steel pipe factory and also we have the St44.4 steel pipe stock. If you need the competitive St44.4 steel pipe price, please don’t hesitate to contact with our sales person.
