DIN 1629 carbon seamless steel pipes

Mar 27, 2024

DIN 1629 carbon seamless steel pipes

DIN 1629 carbon seamless steel pipes are round pipes and tubes made of non-alloy materials used for special quality requirements. There are three main grades: DIN 1629 ST 37.0, 44.0 and 52.0. DIN 1629 pipe grades differ in material composition and mechanical properties. Different grades of Tuberia DIN 1629 can be used in the manufacture of pipes, vessels, equipment, fittings and other applications. They are available in different size ranges. Pipe outer diameters range from 10 mm to 324 mm, wall thicknesses range from 1 mm to 30 mm, and lengths up to 14,000 mm. Tubi DIN 1629 material contains carbon, silicon, manganese, phosphorus and sulfur. ST52.0 grade contains silicon and manganese, while other grades do not. The carbon content of ST37.0 grade is 0.17%, ST44.0 grade is 21%, and ST52.0 grade is 22%. This difference results in different strength values for DIN 1629 seamless pipes. The minimum yield strength of grade 37.0 is 235MPa, and the minimum tensile strength can reach 480MPa; the minimum yield strength of grade 44.0 is 275MPa, and the tensile strength can reach 550MPa; the minimum yield strength of grade 52.0 is 355MPa, and the minimum tensile strength can reach 650MPa. DIN 1629 st 52 is the highest and most expensive grade. DIN 1629 steel pipes can be heat treated such as hot rolling, cold working, stress relief, annealing or normalizing to improve the hardness of the product.

DIN 1629 Seamless Pipe Specification Chart

Standard	DIN 1629
Grade	ST52
Size in MM	4 To 190 x Wall Thickness 0.5 To 15
Outer Dimensions in MM	4 To 60
Wall Thickness in MM	0.5 To 8
Schedule	Schedule XS, Schedule 160, Schedule 40, Schedule XXS, Schedule 80 Supplier and Manufacturer
Length in MM	6000
Pipe Marking	All Pipe are marked as follows: Supplier or Manufacturer’s Name, Standard, Grade, OD, Thickness, Length, Heat Number

Chemical Properties of DIN 1629 St52.0 Carbon Steel Pipes & Tube

Symbol	Material Number	C	P	S	N¹)
St37.0	1.0254	0.17	0.040	0.040	0.009²)
St44.0	1.0255	0.21	0.040	0.040	0.009²)
St52.0³)	1.0421	0.22	0.040	0.035	-

DIN 1629 Pipe Mechanical Composition

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

DIN 1629 Equivalent Astm

DIN 1629	EN	BS NFA 49.210/49.112	ASTM 53
Grade St 37	EN 10216.1Grade P235 T1	Grade TU 37 B TU E 220 A	Grade B
Grade St 44	EN 10216.1Grade P275T1	Grade TU 42 B TU E 235 A	Grade B
Grade St 52-0	EN 10216-3Grade P355N	NFA Grade P355N	ASME SA 381 Grade Y 52

Tuberia DIN 1629 Temperature Range

Steel Grade	Yield stress value by working temperature(Thickness increasing)
Steel Grade	50℃	200℃	250℃	300℃
St 37	235-215	185-170	165-150	140-130
St 44	275-255	215-200	195-180	165-155
St 52	355-335	248-230	225-210	195-185

Tubi DIN 1629 Sizes

Wall Tickness in MM :1 To 30
Outer diameter in Mm:10 To 324
Length in Mm:14000

Check dimensions, tolerance and specification of DIN 1629 Seamless Tubes

Tolerance Chart of DIN 1629 Seamless Tubes

Execution	Size Range	OD Tolerance	Wall tolerance
Hot-rolled Tube	OD – 80 mmOD > 80 mmWall < 12 mmWall - 12 mm	± 0.4 mm± 0.5 % of OD	± 0.7 mm± (5 % x wallthickness + 0.1 mm
Hot-rolled peeled tube	All sizesWall < 12 mmWall - 12 mm	+ 0.25/- 0 mm	± 0.8 mm± (5 % x wall thickness+ 0.2 mm)
Cold Worked tubecold-rolled or cold-drawn	OD < 40 mmOD 40 - 80 mmOD > 80 Wall Thickness< 6 mm Wall Thickness6 - 8 mm Wall Thickness > 8	+ 0.30/- 0 mm+ 0.35/- 0 mm+ 0.40/- 0 mm*	± 0.30 mm± 0.35 mm± 0.40 mm

DIN 1629 st 52 length

Component length (mm)	Outer Diameter 30 To 100 mm	Outer Diameter 100 To 254 mm
10-100	+ 1.0/- 0	+ 2.0/- 0
600-1200	+ 3.0/- 0	+ 4.0/- 0
100-600	+ 2.0/- 0	+ 3.0/- 0
1200-5000	+ 5.0/- 0	+ 6.0/- 0