DIN1629 St37 seamless structure steel tube with high quality

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March 15, 2017

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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 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	Tensile strength Rm N/mm²	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 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.