Product Details

Company introduction

Yantai Xinpeng Steel pipe co,.ltd.

Located in Yantai, a beautiful coastal city in Jiaodong Peninsula, our company is in the (APEC) Science & Technology Industrial Park, urban area of Yantai, with convenient transportation.

Established in December 1992, with registered capital of 5 million yuan and plant and office space of 12,000 square meters, covering an area of 20,000 square meters , our company mainly produces various specifications of cold drawn,rolled precision steel tube,hydraulic cylinder tube and SRB Tube, which are widely used in such industries as hydro-cylinder, automobile, engineering machinery, textile machinery, printing machinery, oil drilling, etc. Our company is also the distributor of several domestic well-known steel tube plants in Shandong, and mainly distributes seamless steel tubes of all kinds of materials.

Products description

Product Item	honed tube
Outer Diameter	30mm~250mm
Wall Thickness	2mm~30mm
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
Surface roughness	Ra0.2~0.8µm
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