Product Details

welcome to our company:

we are the manufacturer of precision seamless steel tube ,and we are the top 5 manufacturer in China ,our company located in a beautiful coastal city -yantai,It is established in 1992,so we have more than about 20 years in seamless steel tube .we mainly produces various specificatuions of cold finished precision steel tube ,which are widely used in hydraulic and pneumatic cylinder for automobile ,engineering machinery,textil machinery ,printing machinery ,oil drilling and other filed.

about our best products

Description	DIN 2391 ST52 200mm cold drawn precision seamless steel tube
Standard	ASTM ,GB ,DIN, EN AISI etc
Material	10#-45#,16Mn,ST35-ST52,Q345
O.D	30mm-250mm
W.T	2mm-30mm
Length	According to the customer’s need
Surface/End	According to the customer’s request
Certificate	ISO9001 2008
Technique	Cold drawn /rolled ,hot rolled ,etc.
Surface	Polished, black, bright. or according to the customer’s acquirement
Application	Hydraulic cylinder , automobile, oil drilling etc.
Package	We usually bundle with steel strips ,branding parcel or wooden box outside or according to the customer’s need
Delivery Time	1.The products in stock will delivery immediately received the deposit 2.According to the order quantity, the delivery time ranges from ten days to twenty days

some dimensions

40*50	90*110	140*170	190*215
40*55	95*110	145*170	190*220
50*60	95*115	150*170	190*225
50*65	100*110	150*175	200*220
55*70	100*114	150*180	200*225
60*70	100*115	155*180	200*230
60*75	100*120	160*175	200*245
60*78	100*125	160*180	200*250
63*73	105*125	160*185	220*250
63*75	110*125	160*190	220*270
63*76	110*130	160*195	225*250
63*78	115*130	165*190	240*273
65*80	115*135	165*205	250*290
70*80	120*140	170*200	250*300
70*82	125*140	180*200	260*300
70*85	125*145	180*205	280*323
70*90	125*150	180*210	280*355
75*90	130*150	180*215	300*350
80*92	130*155	180*220	200*213
80*95	130*160	185*205	200*216
80*100	135*160	185*215	250*266
85*100	140*160	185*220	customized
90*105	140*165	190*210	customized

about the mechincal

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	V:0.02-0.15	Nb:0.015-0.06	Ti:0.02-0.20	Alt≥0.015
ST52 E355 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	0.030	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

about the tolerance of dimension

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

the finished products

about our packaging and shipping

(1)Delivery time: In 20 days or according to client's requires

(2)Trade terms: EXW/FOB/CIF etc

(3)Payments: T/T or L/C or according to client's requires

(4)Port: Yantai or Qingdao

(5)MOQ: 5 metric tons or at customer's demands

(6)Packing: we usually bundle with steel strips ,branding parcel or wooden box outside ,or according to the customer’s acquirement

our processing

about our services :

1. Cargo track service during transporting and feedback service after cargo is loaded on board2. Flexible terms of payment by3. Big discount for repeat customers4. Smooth delivering procedure5. Payment Terms:T/T , L/C And so on.

about our certificate

FAQ

What is the advantage of our company ?

1.Rapid response on any inquiry. 2.Competitive price with best service . 3.Professional inspection department to guarantee quality.4.ISO System 90012008certifa 5 Industry experience over20years.6.Management Systems-Internal Software7.Finished Product Inventory-More Than 5000 Tons.8Raw Material inventory -Over 6000 Mertic Tons.9Shipment of goods -More than 70 countries worldwide.