DIN-1629-St44.0-Steel-Pipe-Specification

Carbon Steel Pipe and Alloy Steel Tube Manufacturers and SuppliersDIN 1629 St44.0 Steel Pipe SpecificationDIN 1629 St44.0 is a round seamless unalloyed steel tube containing a maximum of 0.21carbon and allowing for the addition of nitrogen-fixing elements.It has a tensile strength of 420-550 MPa and a yield strength of maximum 275 MPa at wall thicknesses of s 16 mm,and ismainly used in the construction of chemical plants,containers,pipelines,and in generalmechanical engineering,at operating temperatures of up to 300C.The steel number is 1.0256.◆Manufacture Process●Seamless女DimensionOutside diameter:10.2-660 mm;Wall thickness:1.6-65 mm;Chemical CompositionChemical composition%by massGradecNSt44.00.21 max0.040m3x0.040max0.009max●a:A content in excess of the maximum value stated is permitted if a phosphorus content less than the maximum specified by 0.005%P per 0.001%N is observed.However,the nitrogen content shall not exceed a value of 0.012%in the cast analysis and 0.014%in the product analysis.b:The specified maximum values do not apply if the steels are supplied with the RR (instead of R)type of deoxidization.Mechanical PropertiesUpper yield stress,ReHElongation after fracture,Afor wall thickness,in mm,Tensile strength,RmGrades16>16s40>40s65longitudinaltransverseMPa.minMPa%,min5t44.0275265255420-5502119a:For cold finished tubes in the NBK condition (annealed above the upper transformation point under shielding gas or in a vacuum),minimum values of yield stressower than these values by 20 MPa are permitted.b:For cold finished tubes in the NBK condition,minimum values of tensile strength lower than these values by 10 MPa are permitted.Learn more:DIN 1629 St44.0 Seamless Unalloyed Steel Pipe SpecificationWhatsApp:008613463768992 Email:sales@botopsteelpipes.com Website:www.botopsteelpipes.com