DIN2391 St35 seamless pipe

Precision Steel Tube Cold Drawn Carbon Seamless Steel Pipe DIN2391 St35 St45 St37.0 St37.4 St52.0 St30Si


Torich supply precision steel tubes size from OD 4 mm to OD80 mm,Wall thickness from WT 0.5 mm to WT 10 mm ,Length max 12m ,Could Cut to length for your special requests.Material ST 35,St45,St52 St30Al,St 30Si,Other materials upon agreement with customers.




1.Production method: 
Cold Drawn on the seamless steel tubes, to reach high accuracy on the OD and WT tolerance





2.Features:


Smooth inner and outer surfaces
Available in a variety of outer diameter sizes


Good raw material quality

Narrow tolerance




3.Deliver condition: 
1). BK Cold finished (hard)
2). BKW Cold finished (soft)
3). BKS Cold finished and stress relieved
4). GBK Annealed
5). NBK Normalized




4.Relative standard:

DIN2391 Precision Seamless Steel tubes for precision hydraulic systems 
DIN2393 Precision Welded Steel tubes for precision hydraulic systems

5. Steel Grade and Chemical Compositions:


Grade	C max	Si  max	Mn	P max	S max
ST35	0.17	0.35	≥0.40	0.025	0.025
ST45	0.21	0.35	≥0.40	0.025	0.025
ST52	0.22	0.35	≥1.60	0.025	0.025

8.Mechanical properties

Grade	Condition	Tensile Point (Mpa)	Yield Point (Mpa)	Elongation
ST35	BK	≥ 440		≥ 6%
	BKW	≥ 370		≥ 10%
	GBK	≥ 315		≥ 25%
	NBK	340-470	235	≥ 25%
ST45	BK	≥ 540		≥ 5%
	BKW	≥ 470		≥ 8%
	GBK	≥ 390		≥ 21%
	NBK	440-570	255	≥ 21%
ST52	BK	≥ 590		≥ 5%
	BKW	≥ 540		≥ 7%
	GBK	≥490		≥ 22%
	NBK	490-630	355	≥ 22%