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DIN 1629 Hot Rolled seamless steel pipe

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Steel Tube

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DSC02740

Product Description

DIN 1629 seamless steel pipes (ST35.8 ST52 ST37 ST44 ) 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℃.

DIN 1629 is the standard specifies the Seamless Circular Tubes of Non Alloys Steels with Special Quality Requirements.

DIN 1629 applications the overheated boilers, as minimum thickness ferrite and seamless steel pipes, and as heat exchangers via austenitic pipes.

DIN 1629 Hot Rolled seamless steel pipes are a type of seamless steel pipe that conforms to the standards set by the Deutsches Institut für Normung (DIN) in Germany. These pipes are produced using the hot rolling process, which involves heating the steel billet and then pressing it into the desired shape and size without any seams. DIN 1629 Hot Rolled seamless steel pipes have excellent mechanical properties and are widely used in industries such as petroleum, petrochemical, and machinery manufacturing due to their high strength, corrosion resistance, and precise dimensions.

St35.8 Ⅰ、Chemical Composition(％)：

C	Si	Mn	P

0.07-0.13%	0.17-0.37	0.35-0.65	≤0.035

S	Cr	Ni	Cu

≤0.035	≤0.3	≤0.25	≤0.25

Ⅱ、mechanical property

Yield Point(Mpa)	tensile strength（Mpa）	Elongation(%)	reduction of area

≥205Mpa	≥335MPa	A≥31%	Z≥55%

Ⅲ、Application：

1. The construction field is used in the beam, column, frame and other parts of the building structure to provide stable support and load-bearing functions. 2. The bridge field is used for the main beam and bearing beam of the bridge, which has good seismic performance and bearing capacity. 3. The field of machinery manufacturing is used in the manufacture of cranes, pressure vessels, ships and other large equipment, which assumes an important structural support role.

St52 Ⅰ、Chemical Composition(％)：

C	Si	Mn	P

≤0.18	≤0.50	≤1.70	≤0.030

S	Nb	V	Ti

≤0.025	≤0.07	≤0.15	≤0.20

Cr	Ni	Cu	N

≤0.30	≤0.50	≤0.30	≤0.012

Mo	Als

≤0.10	≥0.015

Ⅱ、mechanical property

Yield Point(Mpa)	tensile strength（Mpa）	Elongation(%)


340MPa	450-655Mpa	19-21%


Ⅲ、Application：

It can be used in civil construction, underground engineering, or for heavy machinery and equipment manufacturing, as well as engineering machinery, mining machinery manufacturing, metallurgical machinery and equipment manufacturing or spare parts, and can also be applied to bridge structures, Marine structures, plant buildings, stations, etc

St37 Ⅰ、Chemical Composition(％)：

C	Si		Mn	P	S

0.17%~0.20%	0.15%~0.35%		0.35%~0.65%	≤0.050%	≤0.050%

Ⅱ、mechanical property

Yield Point(Mpa)		tensile strength（Mpa）		Elongation(%)


235MPa		340~470MPa		17%~25%


Ⅲ、Application：

ST37 materials are widely used in the manufacture of various industrial products, such as components, supports, pipes, mechanical equipment, mechanical parts Parts, etc. In addition, ST37 materials can also be used in construction, Bridges, railways and other fields.

St44 Ⅰ、Chemical Composition(％)：

C	Si		Mn	S	P

0.21%	0.35%		1.50%	0.04%	0.04%

Cr	Ni		Cu	Mo	Al

0.30%	0.20%		0.30%	0.08%	0.02%

Ⅱ、mechanical property

Yield Point(Mpa)		tensile strength（Mpa）		Elongation(%)


230Mpa		330Mpa		38%


Ⅲ、Application：

For example: automotive interior and exterior panels, frames, pillars and other parts