DIN2391 Bk Bkw Bks Gbk Nbk Carbon Steel Seamless Precision Tube

• After-sales Service: Change Against Defect or Technical
• Warranty: 1 Year
• Type: Seamless
• Technique: Cold Drawn
• Material: Carbon Steel
• Surface Treatment: Black
• Model NO.: DN50
• Usage: Hydraulic/Automobile Pipe
• Section Shape: Round
• Wt: 0.8-50mm
• Shape: Round
• Technical: Cold Drawn/Cold Rolled
• Available Grades: St30 Si, St30 Al, St35, St45, St52.
• Transport Package: Wooden Case
• Specification: OD6-350mm
• Trademark: Kingmetal
• Origin: China
• HS Code: 7304519090
• Production Capacity: 1500ton/Month

Product Description

DIN2391 Bk Bkw Bks Gbk Nbk Carbon Steel Seamless Precision Tube
 

DIN2391 Part 2 specifies dimensions for cold finished, seamless precision steel tubes and is to be used in conjunction with DIN2391 part2 which states the relevant technical delivery conditions. The preferred sizes listed in standard are mainly used in mechanical and automotive engineering.

Where steel tubes of dimensions specified in this standard are to comply with the technical delivery conditions listed in subclause 1.2 of DIN 2391 Part 2.

DIN 2391 seamless precision tubes applications - Used in Hydraulic & pneumatic cylinder, Mechanical and Automotive engineering.

Composition Chart of DIN 2391 ST35 Carbon Steel Pipe

Check available sizes of DIN 2391 St35 Seamless Precision Steel Tubes

Standard	Grade	C	Mn	Si	S maximum	P maximum
DIN2391	St35	≤0.17	≥0.4	≤0.35	0.025	0.025

 

DIN 2391 ST35 Pipes Mechanical Behaviour

Cold drawn(Mandatory)

Cold drawn(Soft)

Cold Drawn and Stress Release

Normalizing

Anneal

BK^1^)

BKW^1^)

(BKS)

(NBK)^1^)

(GBK)^1^)

Grade

Tensile

Elongation

Tensile

Elongation

Tensile

Yield point

Elongation

Tensile

Yield point

Elongation

Elongation

Tensile

N/mm^2

%

N/mm^2

%

N/mm^2

N/mm^2

%

N/mm^2

N/mm^2

%

%

N/mm^2

St35

480

6

420

10

420

315

35

340~470

 

DIN Standard	DIN 2391
Available Grade	ST35
Outer Dimensions	4.0 To 60.0 MM
Size in Mm	OD (4-190) x WT (0.5-15)
Wall Thickness	0.5 To 8 mm
Maximum Length	Maximum 6000mm

 

Delivery Conditions

The tubes shall be manufactured from cold drawn or cold rolled processes. The tubes shall be supplied in one of the delivery conditions as follows:

Designation	Symbol	Description
Cold finished (hard)	BK	Tubes do not undergo heat treatment following the final cold forming and thus, have a rather high resistance to deformation.
Cold finished (soft)	BKW	The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding).
Cold finished and stress-relieved	BKS	Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree.
Annealed	GBK	The last cold forming process is followed by annealing in a controlled atmosphere.
Normalized	NBK	The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.

Company Profile
From 1989 to now, Kingmetal Steel focus on manufacturing and distributing pipeline products including piping, fitting, flange, valve and fastener in stainless, carbon, alloy and duplex steel.
Kingmetal has a factory to manufacture seamless stainless steel pipe from DN6 to DN600 and distribute seamless steel pipe and fitting from top brand manufacturers such as Baosteel, Hengsteel, Tiansteel and Pansteel etc.
All of products are strictly compliance with standard, 100% inspection passed including visual, dimension and PMI test before shipment.
Both our sales and logistic teams are over 10 years of experiences and training frequently.
After- sales service with high efficiency, if any products are short quantity/weight or damaged caused by manufacturing, design or transportation can be compensated.

Why choose us?
One-Stop Solution
We have thousands of total production experience, from raw materials to finished products.
Competitive Price
Large scale purchase, standardized production process and efficient management make our price competitive.
Quick Shipping
Years of export experience enable us to control the transportation time more accurately.
Quality Control
The standardized production process, comprehensive management system, professional testing equipment
Special material customization
We support the customization of various complex materials
OEM/ODM
We support any form of OEM/ODM customization requirements.