Product Details

Product Name	cold rolled annealed high precision ST52 steel tube pipe
Outer Diameter	30-250mm
Wall Thickness	2-30mm
Material Grade	20# 45# 16Mn 25Mn 27SiMn E355
Package	Standard packing or as client’s request
Delivery Condition	BK/BKW/BKS/GBK/NBK
Delivery Time	Within 20-30 days after receiving downpayment or as client’s request
Trade Terms	FOB Yantai, Qingdao, or as client’s request
Payment Terms	T/T or L/C or as client’s request
Supply Ability	500 metric tons/per month

Our Company

Established in December 1992, 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 Main products

1.seamless steel tube

Widely 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 also offer as customized seamless steel tube.

ld drawn/rolled steel pipe

Grade: 20# 45# 16Mn 25Mn 27SiMn E355 ST52

Standard: GB/T8713 GB/T3639 DIN2391 EN10305 ASTMA519

Range: 30-300mm

Length: 11m(max)

The cold process can improve the mechanical property of the pipes and offer better tolerance.

3. SRB&Honed steel tube

ID Tolerance: H8 H9 or as client's request

ID Roughness: RA0.4micron(max)

Length: 6m(max)

Inner roughness: Ra0.2-0.8um

Straightness: 1:1000 or customized

This process can improve the roughness of the inner tube to 0.2-0.8um and make tube for cylinder using directly.

Mechanical property

Dilivery Condition	Cold drawn+stress-relieved(BK+S)(SR)			Cold finished(hard)(BK)
Steel Grade	Tensile strength (Rm Mpa)	Yield strength (ReH Mpa)	Elongation A5%	Tensile strength (Rm Mpa)	Elogation A5%
20#	≥520	≥375	≥15	≥550	≥8
45#	≥600	≥520	≥10	≥640	≥5
16Mn(Q345B Q345D)	≥600	≥520	≥14	≥640	≥5
25Mn	≥600	≥510	≥15	≥640	≥5
27SiMn	≥760	≥610	≥10	≥800	≥5
St45	≥520	≥375	≥15	≥550	≥5
E355(St52)	≥600	≥520	≥14	≥640	≥5
SAE1026	≥600	≥510	≥15	≥640	≥5