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DIN 2393 ST52-3 NBK Welded Precision Steel Tubes

DIN 2393 ST52-3 steels is a low alloy, high strength structural steel which can be readily welded to other weldable steel. With its low carbon equivalent, ST52-3 steel possesses good cold-forming properties. ST52-3 steel plate is supplied in normalized or control-rolled condition.

ST52-3 steel has many applications :

Generally ST52-3 steels is used for Machinery parts, mobile equipment, crane, boom, chassis, buildings, bridges and most structural activities. 

1. Field of application

1.1 This standard applies to seamless circular tubes and pipes(hereinafter briefly referred to as “tubes”) made of unalloyed steels as listed in table 1. These tubes are predominantly used in the constructin of chemical plant, vessels, pipework and for general mechanical engineering purposes.

They are designed to meet high performance requirements. Normally there are no limiting vaiues or the maximum permissible working pressure of these tubes. The permission working temperature shall not exceed 300° are specified in Appendix A.

The limits of application and other specifications given in this standard shall apply except in cases here other specifications are contained in codes of practice for specific fields of application, e.g. the Technische Regeln fur Dampfkessel (TRD) (Technical rules on steam boilers) or the Technische Regeln fur Druckbehalter (TRB) (Technical rules on pressure vessels), AD-Merkblatter (AD Instrucation sheets).

We can regard St52-3 steel plate as Carbon and low alloy steel St52-3 steel plate is one mainly of Carbon and low alloy steel, St52-3 steel plate is alloy steel under the EN standard which is equal to DIN17100:St52-3,JIS:SS490/SM490A,BS:50B and UNI7070:Fe510B 1.0570, DIN St52-3, AISI 1024 Designation by Standards

ST52-3 DIN17100 Comparison of steel grades
EN10025:1990 FE 510 B
EN 10025-2 S355JR
JIS SS490/SM490A
NFA 35-501 E36-2
BS1449 50B
UNI7070 FE 510 B


Chemical Composition (in weight %)

Chemical elements C≤ 16mm max C>16mm max Si max Mn max P max. S max.
%,by mass 0.24 0.24 0.55 1.60 0.045 0.045

St52-3 steel plate Mechanical properties

thickness Yield StrengthReH [N/mm2] transv.min. Tensile StrengthRm [N/mm2]transv. Fracture Elongation [%]transv. min. Notch Impact Energy1)Ch Vcomplete samplelongitud. min [J]
t≤ 16mm t >16mm 355 345     20 degree 27J
t < 3mm t ≥ 3mm   510-680 490-630  
Up to 1.5mm 1.51-2.00mm 2.01-2.50mm 2.51-2.99mm ≥ 3mm     13 14 15 16 20

Description Non alloy quality steels: Steels with average C > 0,25 < 0,55 % or Rm > 500 < 700 N/mm2.

ST52-3 NBK DIN 2393 Welded Precision Steel Tubes

ST52-3 NBK DIN 2393 Welded Precision Steel Tubes


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