Product Details

En10305 e355+C carbon cold rolled seamless steel pipe

1.Grade: 20#(aisi1020,ck20),45#(ck45,aisi1045),st52(16Mn,Q345D),25Mn,27SiMn,42CrMO

2.ID:30-250mm

3.ID tolerance:H8,H9

4.Surface roughness:Ra 0.02— 0.4μm

5. Final supply condition:cold drawn and stress-relieved(BK+S

6. Machining allowance:0.5-1.5mm

7.Wall thickness:10%×ID

Variety

Processing

Cylinder Diameter

Straightness

Size Accuracy

W.T/mm

Inner Bore Roughess

Cold drawn/

cold rolled

ID30-250

0.3

H9-H11

±10%

0.4~1.6um

Honed tube

ID50-250

0.3

H7-H9

±10%

<0.4um

Mechanics performance

Material	Tensile strength	Yield strength	Elongation	Hardness
Ck20/20#/AISI1020	>520 N/ mm²	>375 N/mm2	>15%	>85HB
Ck45/45#/AISI1045	>600 N/ mm²	>520 N/ mm²	>15%	>85HB
ST52/16Mn/Q345D	>600 N/ mm²	>520 N/ mm²	>15%	>85HB
25Mn/STKM 13C-T	>600 N/ mm²	>530 N/ mm²	>15%	>85HB

Dimension tolerance

ID size

ID deviation (mm)

H10

+0.021

+0.033

+0.052

+0.084

>30~50

+0.025

+0.039

+0.062

+0.100

>50~80

+0.030

+0.046

+0.074

+0.120

>80~120

+0.035

+0.054

+0.087

+0.140

>120~180

+0.040

+0.063

+0.100

+0.160

>180~250

+0.046

+0.072

+0.115

+0.185

>250~315

+0.052

+0.081

+0.130

+0.210

>315~400

+0.0527

+0.089

+0.140

+0.230

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 proofing

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

Specification:

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
Condition 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, therefore small steel pipe plastically, the plastically 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 Dimension:

OD x WT	OD x WT	OD x WT	OD x WT
48*31.75	98*80	154*130	45*35
45*30	100*85	137*115	35*25
25*19	121*100	94*80	125*100
50*40	120*100	90*80	90*70
40*30	140*120	80*70	100*70
65*50	123*105	111*95	120*100
70*57	146*125	50.5*44.5	31*25
48*40	165*140	158*135	76*55
58*50	176*150	160*135	77*57
60*50	194*160	149*125	77*59
70*50	30*25	42.5*31	Other size can work
95*80	128*110	190*160	Other size can work

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, forestry machinery, etc.