Product Details

Our company

We produce all kinds of specification seamless steel tube , such as cold drawn/rolled precision seamless steel tube ,honed tube ,SRBtube ,etc. And these products are application for hydraulic cylinder, automobile, oil drilling and so on.All of our suppliers are Chinese most famous steel suppliers, such as BAOSTEEL, PANGGANGGROUP, HUBEI XINYEGANG STEEL CO.,LTD., which assure that our material and products are in high quality.

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.

DESCRIPITION OF PRODUCTS

Product Item	Good quality and price cold finished steel tube
Outer Diameter	30mm~300mm
Wall Thickness	2mm~30mm
ID tolerance	H7 H8 H9 or as customized
Material Grade	10#-45#, 16Mn,25Mn,27SiMn,E355, SAE1026
Standard	GB/T8713,GB/T3639,ASTMA519, DIN 2391
Application	Hydraulic Pipe, Hydraulic cylinder, automobile, oil drilling, textile machinery and other field
Package	According to the customer’s request
Delivery Time	20-30days or according to the customer’s request
Finally supply condition	BK BKS BKW NBK GBK
Trade term	FOB YANTAI or as customer's request
Payment term	T/T, or L/C or as customer's request

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

Mechanical property

Delivery 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