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(%)
Mechanical Properties(Mpa)
Inspection and test list for the DIN 2391 Standard.
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 |