Product Details

Product Description

Standard DIN2391, EN10305, JIS G3445, ASTM A519, GB/T 8713...
Material ST45, ST52, E355, E355SR, STKM13C, SAE1026, 20#, Q235B
Heat treatment BK+S
Specification Outer diameter(mm) Inner diameter(mm)
30-250mm 40-250 I.D Tolerance H8-H9
Length Max 6m
Straightness 1/1000
ID roughness RA 0.4micron(max)
Technology Honed & SRB(SKIVED AND ROLLER BURNISHED )
Scope Honed tube for hydraulic cylinder, swivel crane, injection machine and
construction machine application

The hydraulic cylinder tube is the main part of the hydraulic cylinder.The inner hole of the hydraulic cylinder tube usually precision processed by boring,reaming,rolling or honing.By these process can ensure the piston,sealing elements and the support elements move smoothly,then ensure the sealing effect and reduce the abrasion.The hydraulic cylinder tube will bear big pressure,so need high strength and stiffness.

(honing tube) precision tube.
Main materials: 20#, Q235, 20G, 35#, 45#, 16Mn, Q345, 40Cr, 27SiMn, 12Cr1MoV, 10CrMo910, 15CrMo, 35CrMo, 42CrMo.Widely used: engineering machinery, metallurgical machinery, plastic machinery, opening and closing machinery, mining machinery, road construction machinery, textile machinery and other industries.1. Cold rolling 2. Cold drawing 3. Honing.

SRB tube (skived rolled burnished)

1, the processing time is greatly shortened. The pipe that honed 30 minutes before is rolled out in a few minutes.
2, the surfurface hardness of the roller is harder than the surface of honing, and it also improves the service life.

3, the finish of the processing surface is improvedace h.
4, the processing cost is saved. After honing and grinding, the grinding is made of mud. The remaining materials are filamentous and can be recovered later.

Detailed Images

Chemical Composition

Steel Grade	C	SI	Mn	P	S	Cr	Ni	Cu
20#	0.17-0.24	0.17-0.37	0.35-0.65	0.035	0.035	0.250	0.250	/
45#	0.42-0.50	0.17-0.37	0.50-0.80	0.035	0.035	0.250	0.300	/
Q345B	≤0.2	≤0.5	1.00-1.60	0.030	0.030	0.300	0.250	0.08
Q345D	≤0.2	≤0.5	1.00-1.60	0.030	0.030	0.250	0.250	0.15
25Mn	0.22-0.29	0.17-0.37	0.70-1.00	0.035	0.035	/	/	/
27SiMn	0.22-0.32	1.10-1.40	1.10-1.40	0.035	0.035	0.300	0.300	/
E355	≤0.2	≤0.55	≤1.6	0.025	0.025	0.250	0.250	/
SAE1026	0.22-0.28	0.15-0.35	0.60-0.90	0.040	0.050	/	/	/

Mechanical Property

Steel Grade	Rm Mpa	ReH Mpa	Elonggation	cold finished Rm Mpa	cold finished Elonggation
20#	≥520	≥375	≥15	≥550	≥8
45#	≥600	≥520	≥10	≥640	≥5
16Mn(Q345B /D)	≥600	≥520	≥14	≥640	≥5
25Mn	≥600	≥510	≥15	≥640	≥5
27SiMn	≥760	≥610	≥10	≥800	≥5
St45	≥520	≥375	≥15	≥550	≥5
E355(st52)	≥600	≥520	≥14	≥640	≥5
SAE1026	≥600	≥510	≥15	≥640	≥5

Technique and tolerance:

Working method	range	ID	H8	H9	H10
cold drawn	25-250	30-50	+0.0390	+0.0620	+0.1000
cold rolling	25-150	50-80	+0.0460	+0.0740	+0.1200
cold drawn-honed	40-250	80-120	+0.0540	+0.0870	+0.1400
cold drawn-SRB	50-250	120-180	+0.0630	+0.1000	+0.1600
cold drawn -polished	40-250	180-250	+0.0720	+0.1150	+0.1850
cold drawn-polish-SRB	50-250	as required	as required	as required	as required

Our Company

YanTai XinPeng Steel Pipe Co.,Ltd located in Yantai, mainly produces various specifications of cold drawn,rolled precision steel tube,hydraulic cylinder tube and SRB Tube, which are widely used in such industries as hydro-cylinder, automobile, engineering machinery, textile machinery, printing machinery, oil drilling, etc.

Packing & Delivery

Our Team

Our Service

ur service formula:good quality+good price+good service =customer's trust =Honor business
1. Cargo track service during transporting and feedback service after cargo is loaded on board
2. Flexible terms of payment .
3. Big discount for repeat customers
4. Smooth delivering procedure
5. Payment Terms: T/T , L/C and so on

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