Product Details

Our company:

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.

DESCRIPITION OF PRODUCTS

Product Item	honed steel tube
Outer Diameter	30mm~250mm
Wall Thickness	2mm~30mm
Inner roughness	RA0.2-0.8um
Material Grade	10#-45#, 16Mn, 25Mn,27SiMn, E355
Standard	GB/T8713, GB/T3639, DIN2391, EN10305
Application	Hydraulic Pipe, Hydraulic cylinder, automobile, oil drilling, textile machinery
Certificate	ISO9001:2008
Process Method	Cold Drawn/ Cold Rolled/Stress relieved, honed/SRB,Polishing
Package	According to the customer’s requirement
Delivery Time	20days more or according to the customer’s requirement
Price Item	FOB Yantai or as client's request
Payment	T/T or L/C or as client's request
ID tolerance	H7,H8,H9 or as customized
Finally supply condition	BK BKS BKW NBK GBK

Chemical composition

Standard	Grade	Chemical composition (%)
		C	Si	Mn	S	P	Cr
GB/T699	10#	0.07~0.13	0.17~0.37	0.35~0.65	≤0.035	≤0.035
GB/T3639-2000	20#	0.17~0.23	0.17~0.37	0.35~0.65	≤0.035	≤0.035
GB3077-88	35#	0.32~0.39	0.17~0.37	0.35~0.65	≤0.035	≤0.035
	45#	0.42~0.50	0.17~0.37	0.50~0.80	≤0.035	≤0.035
	40cr	0.37~0.44	0.17~0.37	0.50~0.80	≤0.035	≤0.035	0.08~1.10
	25Mn	0.22~0.29	0.17~0.37	0.70~1.00	≤0.035	≤0.035	≤0.25
	37Mn5	0.30~0.39	0.15~0.30	1.20~1.50	≤0.015	≤0.020

Dimensions tolerance

OD(mm)	ID(mm)	Tolerance
OD(mm)	ID(mm)	OD(mm)	ID(mm)	Wall thickness deviation(mm)	Ovality(mm)	Curvature(mm/m)
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 (honed)	≤0.8	≤0.20	0.3

The finished products

Package

1. bundle packing

2. marking as per customer's requests

3. paint on the pipe as per customer request

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 plastically, the plastically 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

Our service

1. Cargo track service during transporting and feedback service after cargo is loaded on board

2. Flexible terms of payment by T/T and L/C
3. Big discount for repeat customers

FAQ:

Q: What about your payment term?

A: Usually T/T or L/C or as client's request

Q: How about your capacity?

A: For steel pipes, 500 tons per month, 6000 tons per year.

Q: what about your package?

1. bundle packing