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DIN 2391 / EN10305-1 Precision Seamless Steel Tube / Pipe for duct connector,St 35, St37, St52, E355

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DIN 2391 / EN10305-1 Precision Seamless Steel Tube / Pipe for duct connector,St 35, St37, St52, E355

Large Image : DIN 2391 / EN10305-1 Precision Seamless Steel Tube / Pipe for duct connector,St 35, St37, St52, E355

Product Details:

Place of Origin:	China
Brand Name:	Hainer Steel
Certification:	ISO9001,SGS,CQC,BV, TUV etc.
Model Number:	St35, St37, St45, St52, E235, E355 etc

Payment & Shipping Terms:

Minimum Order Quantity:	500Kgs/ one size
Price:	Negotiation
Packaging Details:	Plastic bag in bundle,Wooden box,etc.
Delivery Time:	20-25 days
Payment Terms:	T/T, L/C at sight
Supply Ability:	1000Tons/Month

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Detailed Product Description

Condition:

GBK(+A)NBK(+N), BK(+C), BKS

Type:

Seamless

Technique:

Hot Rolled Or Cold Drawn

Highlight:

Thin Wall Stainless Steel Pipe

Stainless Steel Welded Pipe

DIN 2391 / EN10305-1 Precision Seamless Steel Tube / Pipe for duct connector

Quick Detail:

1) Standard: DIN2391, EN10305-1, EN10305-4
2) Steel grade: St35, St37, St45, St52, E235, E355
3) Condition: GBK(+A)NBK(+N), BK(+C), BKS
4) Size: OD3-60mm. WT0.5-8mmMax length 12meters.
5) All steel tube can test Ultrasonic flaw detector, Eddy current flaw detector, depend on customers requirement
6) Usage: Cylinders of machinery, high pressure tubing, automotive etc.

Description:

Product Item No.: 002Precision-Cosco Steel
Product name: eamless Precision Steel Tubes (DIN 2391), seamless steel tube. Precision steel tube, stainless steel tube, seamless pipe, stainless seamless steel pipe, precision seamless tube, small size stainless steel tube. Carbon seamless steel tube, cold drawn seamless steel pipe,
Standard: DIN2391, EN10305-1, EN10305-4
Steel grade: St35, St37, St45, St52, E235, E355
Condition: GBK(+A)NBK(+N), BK(+C), BKS
Size: OD3-60mm. WT0.5-8mmMax length 12meters.
All steel tube can test Ultrasonic flaw detector, Eddy current flaw detector, depend on customers requirement
Usage: Cylinders of machinery, high pressure tubing, automotive etc.
Characteristic: High cleanness, smooth on the both surface, chemical composition and mechanical properties fully according with standards.
Surface Finish: Zinc coating, black phosphated, oiled, or bright.
Marking: Registered logo,Heat Number,Steel Grade,Standard,Size
Packing: Pipe cap both end,plastic bag in bundle
H.S Code: 7304.90

Alloy Steel:

20Cr / AISI5120/ Scr420/ 20Cr4; 30CrMo/ AISI4130/ SCM430/ 25CrMo4

40Cr/ AISI5140/ Scr440/ 41Cr

Standard:

China Standard GB8162-2008, GB3639-2000

American Standard ASTM A106, ASTM A519, ASTM A513,ASTM A179

Germany Standard DIN2391, DIN2445

Japanese Standard JIS G3445 etc

Applications:

We,this type seamless steel pipe be widely used in kinds of industries:

Bicycle spindle, hub, carriage, handle of children cart
Automobile oil duct, oil, duct connector, shock absorb-er,sun visor,level joy stick
Sports equipment,electric roller
Sewing machine, medical equipment

Grade and Chemical Composition(%)
Grade	Chemical Composition(%):
	C max	Si (max)				Mn (min)						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(max)			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					1.20			0.025				0.025		-
E355	1.058	0.22		0.55					1.60			0.025				0.025		-

Mechanical Properties(Mpa)
Steel grade	BK				BKW					BKS						GBK			NBK
	RmN/mm		min		RmN/mm			min		N/mm			ReH	min		N/mm		min	N/mm		ReH	min
	min				min					min			N/mm			min			min		N/mm
													min								min
St35	480		6		420			10		420			315	14		315		25	340-470		235	25
St45	580		5		520			8		520			375	12		390		21	440-570		235	21
St52	640		4		580			7		580			420	10		490		22	490-630		355	22

Steel grade			Minimum values for the delivery condition
Steel name	Steel number		+ C				+ LC						+ SR					+ A		+ N
			Rm Mpa		A%		Rm Mpa				A%		Rm Mpa		ReH Mpa		A%	ReH Mpa	A%	Rm Mpa		ReH Mpa	A%
E215	1.0212		430		8		380				12		380		280		16	280	30	290-430		215	30
E235	1.0308		480		6		420				10		420		350		16	315	25	340-480		235	25
E355	1.0580		640		4		580				7		580		450		10	450	22	490-630		355	22

DIN 2391 / EN10305-1 Precision Seamless Steel Tube / Pipe for duct connector,St 35, St37, St52, E355 0

DIN 2391 / EN10305-1 Precision Seamless Steel Tube / Pipe for duct connector,St 35, St37, St52, E355 1

Ratings & Review

Overall Rating

3.0

Based on 50 reviews for this supplier

Rating Snapshot

The following is the distribution of all ratings

5 stars

33%

4 stars

3 stars

2 stars

67%

1 stars

All Reviews

Songshang

Tuvalu Oct 29.2025

trustpilot.com

Helpful (1)

"Setting the IPD on my Pico 4 was a game-changer! The three physical presets cover most ranges, and the difference in sharpness is noticeable.

h*o

Vatican City State (Holy See) Oct 24.2025

Helpful (123)

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Wanzan

Brazil Oct 23.2025

Helpful (1w+)

"The Pico 4's visual clarity is fantastic once you dial in the IPD correctly. The manual adjustment is smooth, and finding that sweet spot makes all the difference. No more eye strain during long sessions. Highly recommend taking the time to set it up properly!""The Pico 4's visual clarity is fantastic once you dial in the IPD correctly. The manual adjustment is smooth, and finding that sweet spot makes all the difference. No more eye strain during long sessions. Highly recommend taking the time to set it up properly!""The Pico 4's visual clarity is fantastic once you dial in the IPD correctly. The manual adjustment is smooth, and finding that sweet spot makes all the difference. No more eye strain during long sessions. Highly recommend taking the time to set it up properly!""The Pico 4's visual clarity is fantastic once you dial in the IPD correctly. The manual adjustment is smooth, and finding that sweet spot makes all the difference. No more eye strain during long sessions. Highly r

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