DIN 2391 EN 10305 OD10mm-150mm Seamless Steel Pipe

DIN 2391- Seamless Precision Steel Tubes for mechanical and automotive engineering.


EN 10305-1/4 Seamless Steel Tubes for precision applications


We manufacturing mainly contain four types: Spheroidizing of bearing steel pipes withΦ10-Φ150mm, Spheroidizing of bearing Seamless Steel Pipes, Spheroidizing of bearing steel ball with Φ10 -Φ150mm and profile shapes of cold drawing materials ,including hundreds of variety materials. All the processed products have been widely used for bearing rings, bearing rolling body, machine guide rail and motor oil pump plunger etc.

















first-class equipment, first-class product






Direct reading spectromenter for chemical composition analysis






Chemical analysis equipment






Eddy current testing, ultrasonic on-destructive testing such as test






Hardness tester for hardness testing






Electron microscope for metallographic axamination

DIN 2391/EN 10305/A519 Precision Steel Pipe

1. OD 6mm-90mm

2 wall thicknessm:1mm to 20mm

3. Dimensional accuracy: 0.08mm

4. Bore roughness: Ra 0.4-1.6

5. Widely used in Mechanical, Chemical, Oil, Automobile industries.

6. Main Material: ST37.4/E235; ST52.4/E355

7. Delivery State: BK/NBK/BKS/GBK

Grade and Chemical Composition(%):

Grade	Chemical Composition(%):
	C max	Si max	Mn	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
E215	0.10	0.05	0.70	0.025	0.025
E235	0.17	0.35	1.2	0.025	0.025
E355	0.22	0.55	1.6	0.025	0.025

Mechanical Properties(Mpa):

Steel grade	BK(+C)		BKW(+LC)		BKS(+SR)			GBK(+A)		NBK(+N)
	RmN/mm min	min	RmN/mm min	min	N/mm min	ReH N/mm min	min	N/mm min	min	N/mm min	ReH 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
E215	430	8	380	12	380	280	16	280	30	290-430	215	30
E235	480	6	420	10	420	350	16	315	25	340-480	235	25
E355	640	4	580	7	580	450	10	450	22	490-630	355

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