DIN2391 Seamless Precision Steel Tube

DIN2391 Seamless Precision Steel Tube

DIN2391 Seamless Precision Steel Tube

BKS, carbon steel tubes, din 2391, precision steel tube, Seamless tube, seamless tubes, steel tubes

DIN 2391 standard specifies theSeamless Precision Steel Tube used for Mechanical and Automobile.

Carbon steel tubes for machine structural purposes .
Standard:

• DIN2391-1: Seamless Precision Steel Tube.
• EN 10305-1: Steel tubes for precision applications.

Size (mm):

• Outer Dimensions: 4.0mm-60.0mm
• Wall Thickness: 0.5mm-8 mm
• Length: max 6000mm

Application:

• motor-car construction
• pneumatic
• hydraulic operating mechanisms

Steel grade:

• DIN2391-1 ST35
• DIN2391-1 ST45
• DIN2391-1 ST52

Delivery Condition:

• GBK, BKS, BK, BKW, NBK

Inspection and Test:

• Chemical Composition, Mechanical Properties
• Visual and Dimension Test
• NDT
• Grain Size Test

Surface treatment:

• Oil-dip, Varnish, Shot Blasting

Packing:

• Inner packing:Caps on two ends of every pipe
• Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers’ requirements .
• Surface treatment:Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting.
• Marking: as per customers requirement

DIN2391-1: Chemical compositions(%)

Grade	C	Si	Mn	P	S
DIN2391 ST35	≤0.17	≤0.35	≥0.40	≤0.050	≤0.050
DIN2391 ST45	≤0.21	≤0.35	≥0.40	≤0.050	≤0.050
DIN2391 ST52	≤0.22	≤0.55	≥1.60	≤0.050	≤0.050

DIN2391-1: Mechanical properties

Grade	BK		BKW		BKS			GBK		NBK
	Rm N/mm min	min	Rm N/mm min	min	N/ mm min	ReH N/mm min	min	N/ mm min	min	N/mm min	ReH N/mm min	min
DIN2391 ST35	480	6	420	10	420	315	14	315	25	340-470	235	25
DIN2391 ST45	580	5	520	8	520	375	12	390	21	440-570	235	21
DIN2391 ST52	640	4	580	7	580	420	10	490	22	490-630	355	22