St52 DIN2391 Seamless Precision Steel Tube Expansion Without Cracks Supports Laser Cutting Bluesky-Pipe Manufactury

• 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: Bk/Bkw/Bks/Gbk/Nbk
• Shipment Terms: EXW/Fob/CFR/CIF
• Length: 5.5-5.8meter
• Standard: DIN 2391
• 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

Unleash unparalleled precision with our exceptional Customized DIN 2391 Steel Tubes! Engineered for excellence, these tubes represent the pinnacle of precision engineering. Meticulously crafted to align with the rigorous standards of the DIN 2391 Germany specification, these tubes guarantee exceptional technical delivery conditions of the highest caliber. Perfectly suited for precision-driven applications, our seamless, cold drawn steel pipes with their flawless circular cross-sections stand as a testament to unwavering quality and reliability.

Adhering to the prestigious DIN 2391 standard, our steel tubes feature precisely defined dimensional tolerances and an expertly specified maximum surface roughness, rendering them crucial in fields where precision is paramount. These versatile tubes find their quintessential application across the automotive industry, furniture manufacturing, and broader engineering sectors, delivering unmatched performance and accuracy.

Detailed Photos

 

 

Product Parameters

 

Boasting 30 years of expertise in precision seamless steel pipe production, our factory proudly supplies leading automotive and motorcycle brands in China. Our extensive experience is matched by our commitment to high-standard quality control. Our precision steel pipes cater to industries with stringent demands, including automotive, motorcycle, maritime, and hydraulic pipelines. They feature impeccable smoothness, resistance to cracking during cold bending/expansion, superior high-pressure endurance, and unparalleled dimensional accuracy.
 

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 Mpa	A %	Rm Mpa	A %	Rm Mpa	Reh Mpa	A %	Rm Mpa	A %	Rm Mpa	Reh Mpa	A %
St 30Si	1.0211	430	8	380	12	380	280	16	280	30	290 to 430	215	30
St 30 Al	1.0212	430	8	380	12	380	280	16	280	30	290 to 430	215	30
St 35	1.0308	480	6	420	10	420	350	16	315	25	340 t0 480	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	450	10	450	22	490 to 630	355	22

Size tolerance
OD	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
10F		1010	040A10		XC10
10	10	1010,1012	045M10	S10C	XC10	C10,CK10
20	20	1020	050A20	S20C	XC18	C22,CK22
35	35	1035	060A35		XC35,C35	C35,CK35
45	45	1045	080M46	S45C	XC45	C45,CK45
30CrMo	30XM	4130	1717COS110	SCM420	30CD4	25CrMo4
42CrMo		4140	708A42		42CD4	42CrMo4
35CrMo	35XM	4135	708A37	SCM3	35CD4	34CrMo4
25Mn	25T	1025,1026	080A25,080A27			26Mn5

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	OD 15mm-75mm
	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

Company Profile

 

 

 

 

 

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