Product Details

Commodity name: cold rolled seamless stress relieved carbon steel tubing

Company Information

Yantai Xinpeng Steel Pipe Co,.Ltd. is one of the best suppliers of the precision tube and hydraulic cylinder 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.

Products widely used in the hydraulic cylinder of the heavy machinery, Cranes, excavator, forklifts and the Petrol industry.

Hydraulic Cylinder Tube------Main products of Xinpeng,

Used in the hydraulic cylinder of the heavy machinery, Cranes, excavator also forklifts. Material is various, mainly STKM-13CT ST52 CK45 and 1020. We can work and get the mechanical property of the clients need and extended the life of the hydraulic cylinder.

SRB tube ----- used in Elevatorbuffer and Hydraulic Cylinder .This kind tube have a better roughness inner the tube, ra0.2-0.4um and can use directly in the hydraulic cylinder tube. Range: ID 50-250mm and Length can work at most 6M.
Cold finished tube---- Widely Used. Processing range 30-300mm, biggest length is 11M.

Xinpeng Have passed ISo9001 verified from 2008; each tube of ours is strictly in quality control that can assure the product quality of Xinpeng.

Product Description

Technique Parameter

Material	(OD)(mm)	(ID) (mm)	(Tolerance)
Material	(OD)(mm)	(ID) (mm)	OD(mm)	ID(mm)	W.T(mm)	Ovality	Curvature
20# 45# Q345D 25Mn 42CrMo 27SiMn St35 St45 St52 St52.4 STKM13CT A519 …	40-74	30-65	±0.01	-0.3,-0.5	≤0.5	≤0.1	0.3
	74-98	65-85	±0.01	-0.4,-0.6	≤0.5	≤0.15	0.3
	100-116	85-100	±0.02	-0.4,-0.6	≤0.6	≤0.15	0.3
	124-134	110-115	±0.02	-0.6-0.8	≤0.6	≤0.20	0.3
	140-158	120-135	±0.02	-0.7,-0.9	≤0.8	≤0.20	0.3
	165-176	140-150	±0.02	-0.7,-0.9	≤0.8	≤0.20	0.3
	188-203	160-180	±0.02	-0.7,-0.9	≤0.8	≤0.20	0.3

For Honed /SRB tube standard Tolerance

ID size	ID deviation (mm)
ID size	H7	H8	H9	H10
30	+0.021 0	+0.033 0	+0.052 0	+0.084 0
>30~50	+0.025 0	+0.039 0	+0.062 0	+0.100 0
>50~80	+0.030 0	+0.046 0	+0.074 0	+0.120 0
>80~120	+0.035 0	+0.054 0	+0.087 0	+0.140 0
>120~180	+0.040 0	+0.063 0	+0.100 0	+0.160 0
>180~250	+0.046 0	+0.072 0	+0.115 0	+0.185 0
>250~315	+0.052 0	+0.081 0	+0.130 0	+0.210 0
>315~400	+0.0527 0	+0.089 0	+0.140 0	+0.230 0

Material Range of Yantai Xinpeng

Steel Grade
DIN	1629	ST 37 / 44 / 52
	1630	ST 37.4 / 44.4 / 52.4
	2391-2	ST 35 / 45 / 52
EN	17204	C22 – Ck 22 – Cm22 – C35 – Ck 35 – Cm 35 C45 - Ck 45 – Cm 45 – 34 CrMo4
	17210	C15 – Ck 15 – Cm 15 – 16MnCr5
	10305-1	E215/235/355/255
GB	3639	10#, 20#, 16Mn, 45#
ASTM	A 519	1010 1020 1035
	A179-A450	A450
	A822-A450	A450
BS	BS 6323	CFS3 CFS4 CFS5 CFS6 CFS7
NFA	49310	TU 37 b TU 52 XC

Delivery conditions:

Precision tubes are delivered in following conditions

BK (+C) Cold finished/hard (cold finished as drawn).
No heat treatment after last cold forming process.
BKW (+LC) Cold finished/soft
After last heat treatment there is a light finishing pass (cold drawing).
BKS (+SR) Cold finished/stress relieve annealed.
After the final cold forming process the tubes are stress relieve annealed.
GBK (+A) Annealed.
After the final cold forming process the tubes are annealed in a controlled atmosphere.
NBK (+N) Normalized.
After the final cold forming process the tubes are annealed above the upper transformation point in a controlled atmosphere.

Tests: 100% eddy current test, chemical and mechanical inspection, size checking and others

Our Certificate

Xinpeng have passed ISO9001:2015 verified.

Better quality System control best quality .

We have our own Labroarty on the mechanical test and UT testing!

Qualiry Team 15 persons , Target of us is 3000PPM!

Production Process:

Pretreatment : Acid cleaning- Parkerizing

Cold drawn/Cold rolled

Annealing furnace—— Stress-relieving (+SR)

Straightening Machine and Lathe

Straightness Inspecting

CNC Cutting Machine ( cutting for sample testing)

Surface Polishing

CNC Skiving Roller Burnishing Machine——honing

Testing ( 100% Ut testing , Mechanical testing)

Packaging & Shipping

Packaging Detail:	1. Oiled Inside 2. Pipe Caps 3. Bundle Packing 4. Knit Bags 5. Wooden Case
Delivery Detail:	The general delivery is 30~50 days according to your quantity.

Application:

widely used in hydraulic system with precision steel tube, injection molding machine with precision steel tube, hydraulic press with precision steel tube, shipbuilding with steel tube, EVA foaming, hydraulic machinery, hydraulic cutting machine, shoe making machinery, hydraulic equipment, high pressure tubing, hydraulic tubing, card sets of joints, pipe joints, rubber machinery, forging machinery, casting machinery, engineering machiner...

FAQ

1.Are you a trading company or manufacturer?

We are the professional manufacturer of precision seamless steel pipe since the year 1992.

2. How can I get the price?

We usually quote within 24 hours after we get your inquiry by telling us the material, out diameter,

wall thickness length, quantity and application of the steel pipe which you need.

If you are very urgent to get the price.

please inform us in email so that we will regard your inquiry priority.

3. How can I get a sample to check your quality?
After price confirmation, you can require for samples to check our quality. we will provide you

the sample for free, however we could only make sure the same material, the dimension will be

much similar as your request but not same.

And customer should afford the charge of shipment.