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DIN 2391 seamless precision steel tubes

DIN 2391 standard specifies the Seamless steel tubes used for Mechanical and Automobile.
The main products of steel / steel grade: DIN2391-1(ST35, ST45, ST52).

Description Name:
DIN 2391 Seamless cold drawn tubes
DIN 2391 Seamless precision steel tubes
ST35 Precision tubes
ST45 Precision tubes
ST52 Precision tubes
Seamless precision tubes
DIN 2391 NBK Seamless Precision Steel Tubes
DIN 2391 ST35 Seamless precision steel tubes
DIN 2391 ST45 Seamless precision steel tubes
DIN 2391 ST52 Seamless precision steel tubes
ST 52 Honed tubes
ST52 cylinder tubes

Size: 6mm-350mm.
W.T.: 0.8mm-50mm.
Shape: Round.
Production type: Cold drawn or cold rolled.
Length: Single random length/ Double random length or as customer’s actual request max length is 10m.
Grade: St30 Si, St30 Al, St35, St45, St52.
Nansteel Manufacturing Co.,Ltd supplies a full range of DIN 2391 seamless precision steel tubes, click to check View of DIN 2391 Dimensional Table

Marking
The following marking shall be shown on a label attached to the bundle:
the manufacturer’s name or trade mark;
the specified dimensions;
the number of this European Standard;
the steel name or number;
the cast number;
the delivery condition;
in the case of specific inspection, an identification number (e. g. order or item number) which permits the correlation of the product or delivery unit to the related document.

Note:
Mill test certificates will be issued according to EN10204.3
The tubes Shall be Seamless cold drawn or cold rolled.
The manufacture should have TS16949 certificate.

Protection and Packing:
Packed in wooden box or bundles protected with plastic paper, and suitably protected for sea-worthily delivery or as requested.
The tubes shall be delivered with a temporary corrosion protection.
The type of protection shall be at the discretion of the manufacturer.

Application of DIN 2391 seamless precision steel tubes
for Atuo usd;
for machinery use;
Oil cylinder tube;
Motorcycle shock reducer steel tubes;
Auto shock reducer inner cylinder

Grade and Chemical Composition(%)
Grade Chemical Composition(%):
C max Si max Mn P max S max
St 35 0.17 0.35 ≥0.40 0.025 0.025
St 45 0.21 0.35 ≥0.40 0.025 0.025
St 52 0.22 0.55 ≤1.60 0.025 0.025
 
Steel grade Chemical Composition(%):
Steel name Steel number C max Si max Mn P max S max Al min
E215 1.0212 0.1 0.05 0.7 0.025 0.025 0.025
E235 1.0308 0.17 0.35 1.2 0.025 0.025 -
E355 1.058 0.22 0.55 1.6 0.025 0.025 -

Mechanical Properties(Mpa)
Steel Grade Minimum values for the delivery condition
Steel Name Steel Number BK BKW BKS GBK NBK
Rm A % Rm A % Rm ReH A % Rm A % Rm ReH A %
Mpa Mpa Mpa Mpa Mpa Mpa Mpa
St 30 Si 1.0211 430 8 380 12 380 280 16 280 30 290 to 420 215 30
St 30 Al 1.0212 430 8 380 12 380 280 16 280 30 290 to 420 215 30
St 35 1.0308 480 6 420 10 420 315 14 315 25 340 to 470 235 25
St 45 1.0408 580 5 520 8 520 375 12 390 21 440 to 570 255 21
St 52 1.058 640 4 580 7 580 420 10 490 22 490 to 630 355 22

Inspection and test list for the DIN 2391 Standard.
Inspection or test types Test frequency
Internal test Acceptance test
Chemical analysis M M
Tensile testing M One per tested batch
Flattening test or extension test M Two per tested batch
Dimension verification M M
Visual inspection M M
NDT in order to identify leaks Individual Individual


 

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

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