ST52 Carbon Steel Pipes

ST52 steel pipe is a German standard low-alloy steel pipe, with the execution standard DIN17100. The designation "DIN" stands for the German steel standard. The steel grade consists of "St" representing steel, characteristic values of the steel, and quality indicator numbers. For steels with selective deoxidation methods, corresponding symbols (U or R) are placed in front of the steel grade. Steels with special purposes, such as USt52-3 or RRSt37-2, have additional markings. ST52 structural pipes are equivalent to the domestic grade Q345 steel pipes. They are used in the manufacturing of various engineering machinery, including mining equipment such as drilling rigs, electric shovels, electric wheel dump trucks, mining vehicles, excavators, loaders, bulldozers, various types of cranes, coal mine hydraulic supports, and other mechanical equipment and structural components.

ST52 Carbon Steel Tube Specification

Grade: ST52

Size: OD (4-190mm) x WT (0.5-15mm)

Single Random Length: 16ft-22ft/4.8m-6.7m

Double Random Length: 22ft-35ft/6.7m-10.7m

Fixed Length: 16ft-41ft/4.8m-12.5m

Most common Length: 6m, 12m

ST52 Welded Hollow Section Chemical Composition

Standard	Grade	C	Si	Mn	P max	S max
DIN2391	St52	≤0.22	≤0.55	≤1.6	0.025	0.025

ST52 Welded Square Tube Mechanical Characteristics 

Cold drawn(Mandatory)

Cold drawn(Soft)

Cold Drawn and Stress Release

Anneal

Normalizing

BK1)

BKW1)

(BKS)

(GBK)1)

(NBK)1)

Grade

Tensile

Elongation

Tensile

Elongation

Tensile

Yield point

Elongation

Tensile

Elongation

Tensile

Yield point

Elongation

N/mm2

%

N/mm2

%

N/mm2

N/mm2

%

N/mm2

%

N/mm2

N/mm2

%

St52

640

4

580

7

580

420

10

490

22

490~630

355

22

ST52 Welded Square Tube

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GNEE Pipe Test

• Chemical Component Analysis
• Mechanical Properties: Ultimate tensile strength, Yield strength, Elongation
• Technical Properties: Flattening Test, Bending Test, Hardness Test, Impact Test
• Exterior Size Inspection
• Hydrostatic Test
• NDT TEST: ET TEST, RT TEST, UT TEST

GNEE Group has been exporting ST52 steel pipes worldwide for 16 years, including to countries such as New Zealand, Chile, the Netherlands, Kazakhstan, Kyrgyzstan, Indonesia, Thailand, Vietnam, Laos, Malaysia, Colombia, Brazil, Saudi Arabia, Mexico, Australia, and others. If you need steel pipes, feel free to contact us at any time.

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