DIN1629 St37 round mild seamless structure steel tube

The development of steel tubular towers
March 15, 2017
API Spec 5CT casing pipe for oil and gas delivering
March 25, 2017

DIN1629 St37 round mild seamless structure steel tube

Mechanical Tubing: ASTM A519:ASTM A519 American Society for Testing Material
Tube for Structures:DIN 1629 :Deutsches Institut fǖr Normung
Size: OD: 10.3mm-711.2mm WT: Hot finish: 0.250″-4.00″ Cold drawn: 0.035″-0.875″ Length: Random Length,Fixed Length, SRL,DRL
Heart treatment: Annealed, Normalized,Stress relieved ,Cold
Uses: For manufacture of pipelines,vessels,equipment,pipe fittings and steel structures.


Steel GradeType of deoxidization
(R, killed (including semi-killed)) (RR,fully killed)
Chemical Composition, % by mass
SymbolMaterial NumberCPSN¹)Addition of nitrogen fixing elements
(e.g.not less than 0,020% Al total

Mechanical properties:

Steel GradeUpper Yield Stress ReH
for wall thickness, in mm,
Tensile strength
Elongation(%) A5
SymbolMaterial Numberup to 16over 16 up to 40over 40 up to 65LongitudinalTransverse
St 37.01.0254235225216350²) to 4802523
St 44.01.0256275¹)265¹)255¹)420²) to 5502119
St 52.01.0421355345335500²) to 6502119
¹) For cold finished tube in the NBK condition (annealed above the upper transformation point under shielding gas or in a vacuum), minimum values of yield stress lower than these valued by 20N/mm² are permitted.
²) For cold finished tubes in the NBK condition, minimum values of tensile strength lower than these values by 10N/mm² are permitted.






Leave a Reply