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DIN 2440-Steel tubes, medium weight suitable for screwing

The DIN 2440 standard applies to medium-weight tubes suitable for screwing used in applications of medium pressure air and non-hazardous gases. The most common material is St33.2(also known as S185) conforming to DIN 17100. DIN 2440 steel pipes are often supplied in seamless type with zinc coating.

Seamless Steel Tubes DIN 2440 St33-2
The DIN 2440 Grade St 33-2 Round Pipes are the most used ones where the other forms such as square pipes are available. The chemical composition of the pipes contains carbon, silicon, manganese, chromium, nickel and molybdenum.

DIN 2440 ST 33-2 Pipe Specification
Standard  DIN 2440
Grade ST 33-2, ST33-2, ST 33.2
Outside Diameters 32-630mm
Wall Thickness 2.5-75mm
Length any length
Certification DIN 2440 Grade St 33-2 Carbon Steel Seamless Tubes are certified with Mill test Certificate in accordance with En 10204 Type 3.1/3.2. Where 3.2 indicates In-stage inspection by independent inspection agencies like TUV, DNV, BVQS, LLOYDS & EIL.
Testing Requirement IBR, NACE MR 0175,NACE MR 0103, HIC, IGC.
Surface Protection DIN 2440 Grade St 33-2 Tubes are supplied in varnished condition in order to prevent formation of rust.
Nansteel Manufacturing Co.,Ltd supplies a full range of DIN 2
440 ST 33-2 seamless Pipe steel tubes, click to check View of DIN 2440 Dimensional Table.


Chemical Composition of DIN 2440
Grade Mfg. Process DIN 2440 ST 33-2 Chemical composition((%))
C Si Mn P S Ni Cr Mo Others
St33.2 S, W rdf.DIN 17100 - - - - - - -

Equivaent Grades of Carbon Steel ST 33-2 Tubes
DIN 2440 ST 33-2 Equivalent Designation
DIN EN BS NFA ASTM ASME
DIN 2440 Grade St 33-2 - - - -

Mechanical properties of Carbon Steel ST 33-2
Grade Tensile Test MPa or N/mm2 Remaks (Similar to JIS)Similar to KS Possibility Temperature
Min Yield point Tensile Strength
St33.2 - - (SGP)(SPP)  

ST 33.2 Tube OD/Wall tolerance
Outer diameter and wall Thickness
Execution Size Range OD Tolerance Wall tolerance
DIN 2440 ST33-2 Hot-rolled Tube OD – 80 mmOD > 80 mmWall ± 0.4 mm± 0.5 % of OD ± 0.7 mm± (5 % x wallthickness + 0.1 mm
DIN 2440 ST33-2 Hot-rolled peeled tube All sizesWall + 0.25/- 0 mm ± 0.8 mm± (5 % x wall thickness+ 0.2 mm)
DIN 2440 ST33-2 Cold Worked tubecold-rolled or cold-drawn OD 80 Wall Thickness 8 + 0.30/- 0 mm*+ 0.35/- 0 mm*+ 0.40/- 0 mm* ± 0.30 mm± 0.35 mm± 0.40 mm

Know more about this product price, catalogue, mill test certificate,  please inquiry to: sales@nan-steel.com

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