Specifications

1.Grade:20#,45#,Q345D,STKM13C-T(25Mn)
2.OD:40mm-200mm
3.Technique:Cold drawn
Sch40 astm a106 Seamless Steel Black Tube top qu

Commodity name: Sch40 astm a106 Seamless Steel Black Tube top quality

We sell the seamless tube, tubes are best quality and from big steel factory.

 

Xinpeng are specifical on the  hydraulic cylinder tubes,honing or skiving and roller burnishing cylinder tubes

 

Dimensions tolerance

Grade	OD(mm)	ID (mm)	Tolerance
			OD (mm)	ID (mm)	Wall thickness deviation (mm)	Ovality (mm)	Curvature(mm/m)
20#	40-74	30-65	±.01	-0.3,-0.5	≤0.5	≤0.1	0.3
	74-98	65-85	±.01	-0.4,-0.6	≤0.5	≤0.15	0.3
	100-116	85-100	±.02	-0.4,-0.6	≤0.6	≤0.15	0.3
	124-134	110-115	±.02	-0.6,-0.8	≤0.6	≤0.20	0.3
	140-158	120-135	±.02	-0.7,-0.9	≤0.8	≤0.20	0.3
	165-176	140-150	±.02	-0.7,-0.9	≤0.8	≤0.20	0.3
	188-203	160-180	±.02	-0.7,-0.9 Honed	≤0.8	≤0.20	0.3

 

 

Mechanical properties

• Tensile strength:≥520Mpa
• Yield strength :≥375Mpa
• Elongation :>15%
• Hardness :HRB>85
• Supply condition:BKS(+SR)

Delivey conditions:

• Standard packing with plastic caps and strapped bundes.,standard weight approx 1500kg
• Commercial length 2000~10500mm,custom lengths upon request
• Surface protection

 

Production Process:

• Pretreatment : Pickling­—Phosphating—Saponification

 

• Cold drawn/cold rolled

• Annealing furnace——+SR

• Straightener—— Straightening

•  Straightness inspecting

• Dimension inspecting

  

• Sawing

 

• Lathe

• Polishing

• Products inspecting

• Finished Products

About our service:

 

1.cargo track service during transporting and feedback service after cargo is loaded on board

 

2.flexible terms of payment by T/T and L/C

 

3.big discount for repeat customers

 

4.smooth delivering procedure

 

 

RFQ: 

 

Q1.What do you want to purchase ?

 

What we can offer are cold drawn seamless tubes,cold drawn welded tubes (DOM tubes)

 

 

Q2.Do you have the target price ?

 

Generally ,we have the target price when we buy something ,which is good for both supplier and

 

customer ,at the same time ,the target price should be objective ,reflecting the market.

 

 

Q3.What factors have an effect on the price ?

 

1 The market. our price rise and fall accompany with the market

 

2 The material and the grade .Different materials sometimes mean hundreds dollars.

 

3 The sizes. generally ,the thinner is more expensive because of the manufacture difficulty

 

Introduction: 

 

hydraulic cylinder tube st52 din2391 is a kind of after cold rolling processing of a kind of high precison steel tube, full name cold rolled precision seamless steel tube. Precision seamless steel tube wall inside and outside the precision seamless steel pipe seamless steel pipe without oxidation layars, under high pressure without lea, high precision, high finish, cold bending deformation, flaring, flattening without cracks,etc, it is mainly used to produce pneumatic or hydraulic components products, such as a cylinder or cylinder, are made seamless tube. the chemical composition of precision seamless steel tube with carbon sulfur C,Si, Mn, S, P, Cr.

 

The difference between precision steel pipe and seamless pipe:

 

1. the seamless steel tube with obvioue difference is that dimensional accuracy, can be up to 0.1mm.

 

2. high precision steel pipe diameter surface finish, the customer without processing can be used directly and ordinary seamless steel tube to the customer and lather, polishing processing.

 

Features:

 

hydraulic cylinder tube st52 din2391  inside and outside the wall without oxidation layer, under high pressure, no leakage, high precision, high finish, cold bending deformation, flaring, flattening without cracks, surface rust proffing

 

1. The smaller outer diameter

 

2. High precision to do small batch production

 

3. Cold drawn finished products of high precision, good surface quality

 

4.The steel pipe transverse area is more complex

 

5. Steel pipe is superior performance, dense metal

 

Specifiation: 

 

Standard	DIN2391, DIN2445, EN10305, GB/T 3639, GB 8713
Grade	ST35(E235), ST37, ST24(E255), ST52(E355), 10#, 20#, 35#, 45#
O.D.	4.0MM-400MM
W.T.	0.5MM-18MM
Surface Treatment	bare, varnished,oiled, anti-corrosion coating as request
Packing	1. bundle packing 2. marking as per customer's requests 3. paint on the pipe as per customer request 4. pipe caps as customer request
Condirion of Delivery	1. NBK(+N) after cold forming, eventually above phase transition point, in a protective atmosphere of annealing oxidation medium 2. GBK(+A) after cold forming, annealing in non oxidizing medium protective gas 3. BK(+C) the final heat treatment after cold forming, threfore small steel pipe plasticly, the plasticly degree does not guarantee 4. BKW(+LC) after final heat treatment, a tiny cold drawing deformation, continue again when machining steel pipe allowed inside certain limits cold deformation(bending, flaring) 5. BKS(+SR) have a stress relief after cold forming, heat treatment, steel pipe can be carried out within a certain limit in the appropriate processing again

 

hydraulic cylinder tube st52 din2391

 

Some Demension:

 

OD x WT	OD x WT	OD x WT	OD x WT
4*0.5	16*0.5	26*1.8	35*9.0
4*0.8	16*0.8	26*2.0	35*10
4*1.0	16*1.0	26*2.2	38*0.5
4*1.2	16*1.2	26*2.5	38*0.8
5*0.5	16*1.5	26*2.8	38*1.0
5*0.8	16*1.8	26*3.0	38*1.2
48*5.0	70*2.8	90*10	130*14
48*5.5	70*3.0	90*12	130*16
48*6.0	70*3.5	90*14	130*18
48*7.0	70*4.0	90*16	140*2.5
48*8.0	70*4.5	95*2.0	140*2.8
48*9.0	70*5.0	95*2.2	140*3.0

 

Tolerance in Dimension:

 

OD	GB/T3639(GB8713)	DIN2391(EN10305)	Our Tolerence	Best Quality
4-30mm	±0.10mm	±0.08mm	±0.05mm	±0.02mm
31-40mm	±0.15mm	±0.15mm	±0.05mm	±0.03mm
41-50mm	±0.20mm	±0.20mm	±0.05mm	±0.03mm
51-60mm	±0.25mm	±0.25mm	±0.08mm	±0.03mm
61-70mm	±0.30mm	±0.30mm	±0.10mm	±0.05mm
71-160mm	±0.30mm	±0.30mm	±0.10mm	±0.05mm
Tolerance in WT	±0.12mm	±0.10mm	±0.05mm	±0.03mm
Process	Diameter	Length	Precision	Inner Hole Roughness
Cold Rolled	30-100mm	≤12 m	H8-H10	0.4-1.6
Cold Draw	30-250mm	≤12 m	H8-H10	0.8-1.6
Honing	40-500mm	≤12 m	H8-H9	0.4-0.8
Rolling	40-400mm	≤7 m	H8	0.4
Inner Diameter	H8	H9	H10
30mm	±0.033	±0.052	±0.084	5-30mm
30-50mm	±0.039	±0.062	±0.100	±0.080
50-80mm	±0.046	±0.074	±0.120
80-120mm	±0.054	±0.087	±0.140
120-180mm	±0.063	±0.100	±0.160
180-250mm	±0.072	±0.115	±0.185
250-315mm	±0.081	±0.130	±0.210
315-400mm	±0.089	±0.140	±0.230

 

hydraulic cylinder tube st52 din2391

 

Mechanical Properties: 

 

Condition	Materail Grade	T.S (MPa)	Y.S (MPa)	Elongation(%)
BKS	ST35 (10#)	≥420	≥315	≥14
BKS	ST45(20#)	≥520	≥375	≥12
BKS	ST52(16Mn)	≥580	≥420	≥10
GBK	ST35 (10#)	≥315		≥35
GBK	ST45(20#)	≥390		≥32
GBK	ST52(16Mn)	≥490		≥30
NBK	ST35 (10#)	340-470	≥235	≥32
NBK	ST45(20#)	440-570	≥255	≥30
NBK	ST52(16Mn)	490-630	≥335	≥28

 

Application:

 

hydraulic cylinder tube st52 din2391 widely used in hydraulic system with precision steel tube, injection molding machine with precision steel tube, hydraulic press with precision steel tube, shipbuilding with steel tube, EVA foaming, hydraulic machinery, hydraulic cutting machine, shoe making machinery, hydraulic equipment, high pressure tubing, hydraulic tubing, card sets of joints, pipe joints, rubber machinery, forging machinery, casting machinery, engineering machinery, automotive high pressure steel pipe concrete pump, sanitation vehicle, automobile industry, shipbuilding industry, metal processing, military industry, diesel engine, the internal combustion engine, air compressor, construction machinery, forestrymachinery, etc.