Seamless Honed Steel Tube/Oil Cylinder Tubing for Automobile Shock Absorber

Model NO.: HTSP JIS G3445 Technique: Cold Drawn Surface Treatment: as Costomer′s Require Section Shape: Round Delivery Time: 30-50days Trademark: HTSP Origin: China Type: Seamless Material: Carbon Steel Usage: Hydraulic/Automobile Pipe Steel Grade: 10# 20# 45# 16mn 25mn 27simn Application: Shock Absorber,Bushing,Oil Cylinder,Bearings Specification: 6-68MM HS Code: 7304391000 Product Description Automobile and motorcycle precision pipe is mainly used in processing,production of automobile and motorcycle shock absorber,bushing,oilcylinder,needle bearings and other parts.
 
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.
 
Material Comparison 
 

Material	C	Si	Mn	S(≤)	P(≤)	Cr	Ni	Mo	Other
20#	0.17-0.23	0.17-0.37	0.35-0.65	0.035	0.035	≤0.25	≤0.30		Cu≤0.25
45#	0.42-0.50	0.17-0.37	0.50-0.80	0.035	0.035	≤0.25	≤0.30		Cu≤0.25
Q345B	≤0.20	≤0.55	1.00-1.60	0.04	0.04	V:0.02-0.15	Nb:0.015-0.06	Ti:0.02-0.20	Alt≥0.015
16Mn	≤0.20	≤0.55	1.00-1.60	0.045	0.045	V:0.02-0.15	Nb:0.015-0.06	Ti:0.02-0.20	16Mn
25Mn	0.22-0.30	0.17-0.37	0.70-1.00	0.035	0.035	≤0.25	≤0.25
27SiMn	0.24-0.32	1.10-1.40	1.10-1.40	0.03	0.03

 

Final Supply Condition	Cold finished(Hard)(BK)		Cold drawn and stress-relieved (BK+S)			Hardness HB
Parameters	T.S	Elongation	T.S	Y.S	δ5%
	obN/mm2	δ5%	obN/mm2	OsN/mm2
20#	>=550	>=8	>=520	>=470	>=12	175
45#	>=650	>=5	>=600	>=520	>=12	207
16Mn	>=640	>=5	>=600	>=520	>=15	190
25Mn	>=640	>=5	>=600	>=510	>=15	195
27SiMn	>=840	>=5	>=800	>=720	>=10	230

Working Method
 

Working method	Cylinder ID(mm)	Length(m)	Straightness(mm/m)	Tolerance on ID	Tolerance on WT	Roughness(μm)
Cold drawn	40-320	≤12M	0.2-0.5	/	±5%	0.8-1.6
Cold rolling	30-100	≥12M	0.2-0.5	/	±5%	0.8-1.2
cold drawn-honed	40-500	8M	0.2-0.3	H8-H9	±5%	0.2-0.8
Cold drawn-roll	40-400	7M	0.2-0.3	H8-H9	±5%	≤0.4
Deep-hole	320-400	8M	0.2-0.3	H7-H9	±8%	≤0.8
Deep-rolling	320-400	7M	0.2-0.3	H8-H9	±8%	≤0.4

 

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Product Categories : Precision Steel Pipes > Precision Steel Pipes For Shock Absorber