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DIN2391 cold drawn tubes Precision steel tubular st35 st45 st52 seamless honed cylinder tubes.

DIN2391 cold drawn tubes Precision steel tubular st35 st45 st52 seamless honed cylinder tubes.

Category:

Steel Tube

Brief description:

DIN2391 cold drawn tubes Precision steel tubular st35 st45 st52 seamless honed cylinder tubes.

Key words:

Product Description

Description Name:DIN 2391 Seamless cold drawn tubes, DIN 2391 Seamless precision steel tubes, ST35 Precision tubes, ST45 Precision tubes, ST52 Precision tubes, Seamless precision tubes, DIN 2391 ST35 Seamless precision steel tubes, DIN 2391 ST45 Seamless precision steel tubes, DIN 2391 ST52 Seamless precision steel tubes, ST 52 Honed tubes, ST52 cylinder tubes.

Standard	DIN 2391-1
Grade	St30 Si, St30 Al, St35, St45, St52.
Technical	cold-drawn or cold-rolled. seamless
Application	Industrial, Mechanical, Automotive, and so on.
Shape	Round
Outside Diameter	4-350mm
Wall Thickness	0.5-50mm
Length	Single random length/ Double random length or as customer’s actual request max length is 10m.
Delivery Condition	BK(Cold Drawn,Hard),BKW(Cold Drawn,Soft),BKS(Cold Drawn, Stress relieved),GBK(Annealed),NBK(Normalized)
MOQ	2 Ton each size
Package	Oil dipped surface, small diameter packed in wooden boxes, large diameter wrapped with woven bags, tied with steel strips
Shippment	20'GP/40'GP/40'HQ FCL or LCL
Incoterms	EXW,FOB, CFR,CIF
Payment	1) 20%/30%T.T deposit, 80%/70% T/T balance before shipment. 2) 20%/30%T.T deposit, 80%/70% T/T against the copy of B/L.
Delivery	Depends on the stock availability and actual order quantities.

Chemical Composition

Standard	Grade		Chemical Components (%)
Standard	Symbol	Material No.	C	Si	Mn	P	S
DIN2391	St 30 Si	1.0211	≤0.10	≤0.10	≤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 5	1.0408	≤0.21	≤0.35	≥0.40	≤0.025	≤0.025
	St 52	1.058	≤0.22	≤0.55	≤1.60	≤0.025	≤0.025

DIN2391steel grade mechanical property

Steel Grade	Steel number	BK cold finished hard		BKW (soft)		BKS cold finished + stress			GBK annealed		NBK Normalized
Steel Grade	Steel number	Tensile MPA	Elongation % A	Tensile MPA	Elongation % A	Tensile MPA	Yield MPA	Elongation % A	Tensile MPA	Elongation % A	Tensile MPA	Yield MPA	Elongation % A
st 30 Si	1.0211	430	8	380	12	380	280	16	280	30	290-420	215	30
st 30 AL	1.0212	430	8	380	12	380	280	16	280	30	290-420	215	30
st 35	1.0308	480	6	420	10	420	315	14	315	25	340-470	235	25
st 45	1.0408	580	5	520	8	520	375	12	390	21	440-570	255	21
st 52	1.0589	640	4	580	7	580	420	10	490	22	490-630	355	22

The tubes shall be manufactured from cold drawn or cold rolled processes.

The tubes shall be supplied in one of the delivery conditions as follows:

Designation	Symbol	Description
Cold finished (hard)	BK	Tubes do not undergo heat treatment following the final cold forming and thus, have a rather high resistance to deformation.
Cold finished (soft)	BKW	The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding).
Cold finished and stress-relieved	BKS	Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree.
Annealed	GBK	The last cold forming process is followed by annealing in a controlled atmosphere.
Normalized	NBK	The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.

If required by the Customer, we offer:

· End Bevelling

. Cutting to requested Lengths

·Grinding or Shot-Blasting of External Tube Surfaces

. Outside surface painting using environment-friendly paints

·Ultrasonic Testing

· Impact Resistance Testing at +20°℃to-60°℃

·Hydrostatic Testing at Pressure of up to 130 MPa depending on customer requirements

Application

Steel pipe for hydraulic system, steel pipe for automobile, widely used in hydraulic system steel pipe, steel pipe for injection molding machine, steel pipe for hydraulic machine, marine steel pipe, EVA foam oil pressure machinery, precision oil pressure cutting machine steel pipe, shoe machinery, hydraulic equipment, high pressure oil pipe, hydraulic oil pipe, tube joints, steel pipe joints, rubber machinery, forging machinery, die-casting machinery, engineering machinery, high pressure steel pipe for mixer pump truck, sanitation car, automotive industry, shipbuilding industry, metal processing, military industry, diesel engine, internal combustion engine, air compressor, construction machinery, agriculture and forestry machinery, etc.