Product Details

din2391 st52 bks h8 cold drawn hydraulic cylinder seamless precision steel

honed tube

Detail table 1

din2391 st52 bks h8 cold drawn hydraulic cylinder seamless steel honed tube
Standard	DIN2391
Material	ST45, ST52, E355, E355SR, STKM13C, SAE1026, 20#, Q235B, CK45...
Heat treatment	BK+S
Specification	Outer diameter(mm)	Inner diameter(mm)
	50-300mm	40-250
I.D Tolerance	H8-H9
Length	3-9m (Customers usually choose the 4~5.8m)
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

Table 2

Material	C	Si	Mn	S(≤)	P(≤)	Cr	Ni	Mo	other
C20#	0.17—0.23	0.17—0.37	0.35—0.65	0.035	0.035	≤0.25	≤0.30		Cu≤0.25
CK45#	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	0.040	0.040	0.02-0.15	0.015-0.06	0.02-0.20	Alt≥0.015
ST52 E355 16Mn	≤0.20	≤0.55	1.00—1.60	0.045	0.045	0.02-0.15	0.015-0.06	0.02-0.20
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	0.030	0.030
42SiMn	0.39—0.45	1.10—1.40	1.10—1.40	0.030	0.030
42CrMo	0.38—0.45	0.17—0.37	0.50—0.80	0.025	0.025	0.90—1.20		0.15—0.25

Processiong form	I.D	length	straightness	I.D tolerance	I.D rounghness
Cold rolled	20-100	≤10M	0.3-1.0	H7-H9	0.4-1.6
Cold drawn	76-245	≤12M	0.3-1.0	H7-H9	0.8-1.6
honed	40-180	≤7M	1000	H7-H9	0.4-0.8
SRB	63-180	≤7M	1000	H7-H8	0.1-0.4

Photo

Packing&delivery

Company profile

Liaocheng kuncheng pipe co.,ltd,founded in 2002,was located in Liaocheng,shandong province,

The biggest steel pipe market of China.We are one professinal group company which have annuel

produciton capacity of 400,000tons and 50,000tons stock of seamless pipes,galvanized pipe,square rectangular tubes and so on.These products have been exported to more than 20 countries&regions

and earned very good reputation in the worldwide.

Contact Person

Amy (Ms.)

Mob:+86 15954925206(Wechat)

Fax:+86 635 2112698

Skype:Amy_Zh9

Whatsup:+86 15954925206

Website: http://kcsteelpipe.en.china.cn

FAQ

Q: Are you trading company or manufacturer ?

A: We are manufacturer

Q: How long is your delivery time?