Product Details

Company Information

Shandong Liaocheng Joyoung steel pipe manufacturing Co., Ltd. is located in Liaocheng, known as “water city“,the west of Shandong province.The company is one of the least professional steel pipe manufacturing enterprise with a set of producing hot rolled seamless steel pipes,cold draw seamless steel pipes andprecision cold rolled seamless steel pipe.

Founded in 2006, the company has a registered capital of 5 million yuan .The company produces and sells 50000 tons of various seamless steel pipes and realizes the output value of 2 billion yuan .The company is mainly engaged in the research, development and manufacture of seamless steel pipes, precision cold rolled seamless steel pipe and cold drawn steel pipes, with the annual productivity of 70,000 tons.

Advanced production technology ,perfect testing system ,strict quality control process ensure the reliability and stability of our product quality .The product outside diameter

from 21to 108 mm and the wall thickness is from2 to 25mm .The products passed the certification of American Petroleum Institute, and obtained the logo use licenses of API 5L .The company has successively passed the certification of ISO9001 Quality Management System, the certification of OHSAS 18001 Occupation Health Safety Management System and the certification of ISO 14001 Environmental Management System.

Shandong Liaocheng Joyoung steel pipe manufacturing Co., Ltd. sincerely welcomes all friends for sincere cooperation and create a bright future.

Product Description

Honing tube and rolling tube inside and outside wall oxide layer, to withstand high pressure without leakage, high-precision, high-quality finish, cold deformation, flaring, flattening without cracks a bit, so mainly used to produce pneumatic or hydraulic components products, such as cylinder or cylinders, which can be seamless. Chemical composition of two kinds of materials are C, Si, Mn , S, P, Cr. Relatively speaking rolling tube better than honing tube good.

Hydraulic pneumatic liner actuator standard/size/precise

Processing the form	Cylinder diameter	Length	Straightness	Dimensional accuracy	Wall thickness	Inner hole roughness
cold drawn	48~325	≤12m	0.3~0.8mm/m		±10%	0.8~1.6µm
honing	48~325	≤10m	0.3~0.8mm/m	H8~H9	±10%	0.3~0.8µm
roling	50~250	≤ 9m	0.3~0.8mm/m	H7~H9	±10%	0.01µm

Material ingredient

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
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	0.03	0.03