DIN 2391 in Germany Satisfactory Steel Pipe Comparable to Benteler Steel Tube Gmb, Factory Made in China Price St52 E355

• Customization: Available
• After-sales Service: Free
• Warranty: Free
• Model NO.: DIN 2391
• Type: Seamless
• Technique: Cold Drawn
• Material: Carbon Steel
• Surface Treatment: Oiled
• Usage: Hydraulic/Automobile Pipe, Machinery Industry, Construction & Decoration, Special Purpose
• Section Shape: Round
• Customized: Yes
• Condition: +C(Bk)/+LC(Bkw)/+Sr(Bks)/+a(Gbk)/+N(Nbk)
• Shipment Terms: EXW/Fob/CFR/CIF
• Length: 5.5-5.8meter
• Standard: DIN 2391/En10305
• Transport Package: Bund
• Specification: OD 3in(76.3mm) under
• Trademark: bluesky pipe
• Origin: China
• HS Code: 7304319000
• Production Capacity: 50000 Ton/Year

Product Description

Product Description

Din2391 is the standard for seamless precision steel pipes in Germany. It standardizes the main technical requirements for steel pipes, covering requirements for dimensions, tolerances, surface quality, chemical composition, and mechanical properties, ensuring high precision and quality of steel pipes.Widely used in hydraulic systems, engineering machinery, automotive parts, and precision machining

Hydraulic system and Engineering machinery : 

Automotive parts:

mechanical fields:

DIN 2391 steel pipes are commonly used in hydraulic systems such as hydraulic presses, injection molding machines, die-casting machines, etc. They can withstand high-pressure environments and are suitable for various hydraulic equipment

These steel pipes are also commonly used in automotive manufacturing, such as precision steel pipes for automobiles, especially in situations where high precision and strength are required

DIN 2391 steel pipes are widely used in engineering machinery, shipbuilding industry, metal processing, construction machinery and other fields to meet the needs of various complex working conditions

Specification

Chemical composition
Steel grade		% by mass
Symbol	Material number	C max.	Si max.	Mn	P max.	S max.
St 30Si	1.0211	0,10	0.30	≤0.55	0,025	0,025
St 30 Al	1.0212	0,10	0,05	≤0.55	0,025	0,025
St 35	1.0308	0,17	0,35	≥0,40	0,025	0,025
St 45	1.0408	0,21	0,35	≥0.40	0,025	0,025
St 52	1.0580	0,22	0,55	≤1,60	0,025	0,025

Mechanical properties at room temperature
Steel grade		Minimum values for the delivery condition
		BK	BKW	BKS	GBK	NBK
Steel name	Steel number	Rm/A%	Rm/A%	Rm/Reh/A%	Rm/A%	Rm/Reh/A%
St 30Si	1.0211	430/8	380/12	380/280/16	280/30	290to430/215/30
St 30 Al	1.0212	430/8	380/12	380/280/16	280/30	290to430/215/30
St 35	1.0308	480/6	420/10	420/350/16	315/25	340to480/235/25
St 45	1.0408	580/5	520/8	520/375/12	390/21	440to570/255/21
St 52	1.0580	640/4	580/7	580/450/10	450/22	490to630/355/22

Size tolerance
external diameter	Standard tolerance			Special tolerance
Outer Diameter	GB/T3639	DIN2391	EN10305	O D	thickness
4mm-20mm	±0.10 mm	±0.08 mm	±0.08 mm	±0.05mm	±0.05mm
20mm-30mm	±0.10 mm	±0.08 mm	±0.08 mm	±0.08 mm	±0.08 mm
31mm-40mm	±0.15 mm	±0.15 mm	±0.15 mm	±0.10 mm	±0.08 mm
41mm-60mm	±0.20 mm	±0.20 mm	±0.20 mm	±0.15 mm	±0.15 mm
61mm-80mm	±0.30 mm	±0.30 mm	±0.30 mm	±0.20 mm	±0.20 mm

Equivalent Material referance:
GB	TOCT	ASTM	BS	JIS	NF	DIN
10	10	1010,1012	045M10	S10C	XC10	C10,CK10
20	20	1020	050A20	S20C	XC18	C22,CK22
35	35	1035	060A35	S35C	XC35,C35	C35,CK35
45	45	1045	060A42\060A47	S45C	XC45	C45,CK45
15CrMo	15XM	A387 GR.B	BS1653	SCM415	15CD4	15CrMo5
20CrMo	20XM	4118	CDS110	SCM420	18CD4	20CrMo5
30CrMo	30XM	4130	1717COS110	SCM430	30CD4	25CrMo4
42CrMo	38XM	4140	708A42	SCM440	42CD4	42CrMo4
35CrMo	35XM	4135	708A37	SCM435	35CD4	34CrMo4
25Mn	25T	1025,1026	080A25,080A27			26Mn5
16Mn	14T2	SA414Gr.G	1633Gr.L	SPV32	A52C1	17Mn4/19Mn5
20Cr	20X	5120	527A19	SCr420	18C3	20Cr4
40Cr	40X	5140	530A40	SCr440	42C4	38Cr4/41Cr4

Material	10#-45#, 16Mn, A53-A369, Cr-Mo alloy, Q195-Q345, ST35-ST52, 10#, 20#, 45#,  16Mn, A213, A315, 30CrMo, Q195, Q215, Q235, Q345, ST35, St37, St45, St52
Surface	Black/ Bright
Standard	DIN, GB, JIS, DIN 17175, DIN 2391, GB 5310, GB/T 13793, GB/T3639 , JIS G3441,EN 10305,ASTM A519
Size	under OD 75mm(3in)
	Thickness 1-12mm
Processing	Cold rolled/ Cold drawn
	1. BK (+C)  No heat treatment after last cold forming process.
	2. BKW (+LC) After last heat treatment there is a light finishing pass ( cold drawing)
	3. BKS (+SR) After the final cold forming process the tubes are stress relieve annealed.
	4. GBK (+A) After the final cold forming process the tubes are annealed in a controlled  atmosphere.
	5. NBK (+N) After the final cold forming process the tubes are annealed above the  upper transformation point in a controlled atmosphere.
Packing	Woven bag/ Wooden or crate carton/ Bundle Packing/ Plain end or vanished as per  customer's request.
Delivery time	Normally 25-40 working days

advantage

Pipe Precision straightening

We accept product customization, and we also have multiple forms to choose from for cutting steel pipes. After our processing, the straightness of our small-diameter pipe fittings can reach 0.05mm, and they are mainly used as hollow shafts for motors.

Packaging & Shipping

We offer various forms of packaging and transportation. Plain end or vanished as per  customer's request.Woven bag/ Wooden or crate carton/ Bundle Packing ,You are free to choose.

At the same time, we also have trains and cargo ships to choose from for transportation

Certifications

Certificates and Honors

We have successively passed ISO9001, ISO14000, and even obtained the IATF16949 certificate in the automotive industry, becoming a supplier to major global automotive brands.At the same time, we also have a series of patents, and all our indicators have been tested by SGS.

FAQ

Q: Are you trading company or manufacturer?
A: We are professional manufacturer for steel pipes,and our company also is a very professional and technical foreign trade company for steel products. We have more export experience with competitive price and best after-sales service. Apart from this,we can provide a wide range of steel products to meet the requirement of customer.

Q:Will you delivery the goods on time?
A: Yes,we promise to provide best quality products and delivery on time no matter if the price change lot or not. Honesty is our company's tenet.

Q: Do you provide samples ? is it free or extra?
A: The sample could can provide for customer with free,but the freight will be covered by customer account. The sample freight will be returned to customer account after we cooperate.

Q: How can I get your quotation as soon as possible?
A: The email and fax will be checked within 24 hours,meanwhile,Wechat and WhatsApp will be online in 24 hours. Please send us your requirement and order information,specification(Steel grade,size,quantity,destination port),we will work out a best price soon.

Q: Do you have any certifications?
A: Yes,that's what we guarantee to our clients. we have IS09000,IATF16949 certinicate,ISO 14001 certificates etc.Our products are of high quality and we have professional engineers and development team.

Q: What is your terms of payment?
A:Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shipmenit or paid against copy of B/L within 5 working days. 100% Irrevocable L/C at sight is favorable payment term as well.

Q: Do you accept the third party inspection?
A: Yes absolutely we accept
 

Company Profile