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DIN 1629

Date:2018-03-23    keywords:DIN 1629

DIN 1629Seamless Steel pipe Of Non Alloys Steels are made of unalloyed steels, it's main grades are St 37.0, St44.0, St52.0, Din 1629 seamless steel pipes application fields are: chemical plant, vessels, pipework construction and for common mechanical engineering purposes. Normally DIN 1629 standard are manufactured with no limiting working pressure values. Working temperature is limited below 300℃.

Chemical composition:

Steel Grade Type of deoxidization
(R, killed (including semi-killed)) (RR,fully killed)
Chemical Composition, % by mass
Symbol Material Number C P S N¹) Addition of nitrogen fixing elements
(e.g.not less than 0,020% Al total
St37.0 1.0254 R 0.17 0.040 0.040 0.009²) -
St44.0 1.0255 R 0.21 0.040 0.040 0.009²) -
St52.0³) 1.0421 RR 0.22 0.040 0.035 - Yes

Mechanical properties:

Steel Grade Upper Yield Stress ReH
for wall thickness, in mm,
Tensile strength
Rm
N/mm²
Elongation(%) A5
Symbol Material Number up to 16 over 16 up to 40 over 40 up to 65 Longitudinal Transverse
St 37.0 1.0254 235 225 216 350²) to 480 25 23
St 44.0 1.0256 275¹) 265¹) 255¹) 420²) to 550 21 19
St 52.0 1.0421 355 345 335 500²) to 650 21 19


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