Product Details

our company information

our company is one of the best supplier of precision seamless steel tube in north of China ,since 2002 cold drawn machine set importing ,xinpeng become a big precision steel pipe manufacture with 500Mt month productivity in the next 12 years.our product widely used in hydraulic cylinder ,automobile ,oil drilling ,textil machinery ,engineering machinery ,welcome to our company to visinting and negotiate business .

our product information

Product Item	AISI 4140 cold drawn seamless steel tube for drill rod
Outer Diameter	30mm~250mm
Wall Thickness	2mm~30mm
Material Grade	10#-45#, 16Mn, Q195-Q345, ST35-ST52, STB35-STB42, 20#, 45#, 16Mn, Q345, ST35, St45, St52, St52.4, STB42, 10#-45#,ST35-ST52
Standard	ASTM, DIN, ASTM A1020-2002, DIN 2391
Application	Hydraulic Pipe, Hydraulic cylinder, automobile, oil drilling, textile machinery
Certificate	ISO9001:2008
Process Method	Cold Drawn/ Cold Rolled
Surface Finish	Annealed, Pickled or according to the customer’s acquirement
Package	According to the customer’s requirement
Delivery Time	10days more or according to the customer’s requirement
Price Item	FOB CIF EXW
Payment	T/T(30% in advance, 70% against the BL Copy) and L/C at sight or as negotiation
ID tolerance	H8,H9b H10 or as customized
Surface roughness	Ra0.2~0.8µm
Finally supply condition	BK BKS BKW NBK GBK

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
90*105	140*165	190*210

the tolerance of dimension

ID size

ID deviation (mm)

+0.021

+0.033

+0.052

>30~50

+0.025

+0.039

+0.062

>50~80

+0.030

+0.046

+0.074

>80~120

+0.035

+0.054

+0.087

>120~180

+0.040

+0.063

+0.100

>180~250

+0.046

+0.072

+0.115

>250~315

+0.052

+0.081

+0.130

>315~400

+0.0527

+0.089

+0.140

the delivery condition

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 plastic, the plastic 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

some pictures of our company and product