DIN 2391-1 cold Drawn or cold rolled steel tube

Date:2019-10-08 View:3368 Tags:DIN 2391-1 cold Drawn or cold rolled steel tube

DIN 2391-1 cold Drawn or cold rolled steel tube is used in hydraulic & pneumatic cylinder, mechanical and Automotive engineering.

Related information for DIN 2391

DIN 2391 standard specifies the Seamless steel tubes used forMechanical and Automobile.

for Atuo usd
for machinery use
Oil cylinder tube
Motorcycle shock reducer steel tubes
Auto shock reducer inner cylinder

GB/T 3639 Cold drawn or cold rolled precision seamless steel tubes
GB/T 8713 inside precision seamless tubes for hydraulic pressure and pneumatic services

Marking:

Pipes are supplied with marking according to standard and customer request.
Marking is paint on the ends of pipes.
The same data, as well as additional information per customer’s request, is indicated on the bundle’s tags.

Delivery:

Pipes are supplied in hexagonal bundles or round bundles tied with steel strip.
Weight of bundle – up to 5000 kg upon request of customer.
Each bundle is furnished with three tags.

Features Specifications

OD(mm)	Wall Thickness Unit(mm)
OD(mm)	2	2.5	3	3.5	4	4.5	5	6	6.5-7	7.5-8	8.5-9	9.5-10	11	12
Φ25-Φ28	●	●	●	●	●	●
Φ32		●	●	●	●	●	●
Φ34-Φ36		●	●	●	●	●	●
Φ38		●	●	●	●	●	●
Φ40			●	●	●	●	●
Φ42			●	●	●	●	●
Φ45			●	●	●	●	●	●
Φ48-Φ60			●	●	●	●	●	●	●
Φ63.5				●	●	●	●	●	●	●
Φ68-Φ73					●	●	●	●	●	●
Φ76					●	●	●	●	●	●	●	●	●	●
Φ80					●	●	●	●	●	●	●	●	●	●
Φ83					●	●	●	●	●	●	●	●	●	●
Φ89					●	●	●	●	●	●	●	●	●	●
Φ95					●	●	●	●	●	●	●	●	●	●
Φ102					●	●	●	●	●	●	●	●	●	●
Φ108					●	●	●	●	●	●	●	●	●	●
Φ114						●	●	●	●	●	●	●	●	●
Φ121						●	●	●	●	●	●	●	●	●
Φ127						●	●	●	●	●	●	●	●	●
Φ133						●	●	●	●	●	●	●	●	●
Φ140							●	●	●	●	●	●	●	●
Φ146							●	●	●	●	●	●	●	●
Φ152							●	●	●	●	●	●	●	●
Φ159							●	●	●	●	●	●	●	●
Φ168							●	●	●	●	●	●	●	●

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	A %	Mpa	A %	Mpa	Mpa	A %	Mpa	A %	Mpa	Mpa	A %
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	1.0580	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
Inspection or test types	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

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.

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.

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