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

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.