DIN 1629 Seamless Steel pipe Of Non Alloys Steels

DIN 1629 Seamless Steel pipe Of Non Alloys Steels

DIN 1629 Seamless 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
1) For cold f inished 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.

Tiancheng Group supplies DIN 1629 Seamless Steel pipe and other steel grades tubes for high pressure and temperature applications, if you are interested in buying seamless boiler tubes from reliable steel mills, please send an email now!

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---- Josen Dong (Manager)  

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