Product Details

ABOUT OUR COMPANY :

we are the manufacturer of precision seamless steel tube ,we mainly produces various specifications seamless steel tube ,such as cold drawn seamless steel tube ,hydraulic cylinder steel tube ,and so on ,which are widely used in hydraulic cylinder ,automobile ,oil drilling ,textil machinery ,printing machinery .our company established in 1992 ,so we have more than 20 years experience in the steel tube world .so welcome to our company to negotiate business and visiting .

ABOUT OUR PRODUCTS

Production	JIS stb30 Cold rolled seamless carbon steel tube & pipe for export
Standard	DIN 2391/EN 10305/GB/T8162/ASTM A519,etc.
Out Diameter	30mm-250mm
Wall Thickness	2mm-30mm
Material	10#-45#,st35-st52,q345,25Mn
Length	According to the customer’s acquirement
Surface treatment	According to the customer’s need
Technique	Seamless & welded
Usage	1. hydraulic cylinder 2. automobile 3. oil drilling 4.textil machinery 5. printing machinery 6. engineering machinery
Package	1. Bundle packing. 2. Bevelled end or plain end or warnished as per buyer's required. 3. Marking: as per customer's requests. 4. Painting varnish coating on the pipe. 5. Plastic caps at ends.
Supply	1. seamless steel pipe 2. cold drawn seamless steel tube 3. hydraulic cylinder steel tube 4. DOM tube 5. SRB/honed steel tube 6. hot rolled seamless steel tube 7. cold rolled seamless steel tube
Min Order Quantity	According to customer's requirement
Payment terms	L/C, T/T,
Contact	If you have any questions, please feel free to contact me.

THE FINISHED PRODUCTS

CHEMICAL COMPOSITION OF MATERIAL

Steel grade	Chemical composition,%
	C	Si	Mn	P	S	Cr
				P	S	Cr
				≤
St45 (20#)	0.17-0.24	0.17-0.37	0.35-0.65	0.035	0.035	0.25
ST52(E355)	≤0.22	≤0.55	≤1.6	0.025	0.025	0.25
SAE1026	0.22-0.28	0.15-0.35	0.6-0.9	0.04	0.05	/
STKM 13C	≤0.25	≤0.35	0.3-0.9	0.04	0.04	/
Q345B	≤0.2	≤0.5	1.0-1.6	0.03	0.03	0.30
CK45	0.42-0.50	0.17-0.37	0.5-0.8	0.035	0.035	0.25

MECHANICAL PROPERTY OF MATERIAL

Delivery condition	cold finished(hard)(BK)		Cold drawn and stress-relieved(BK+S)
Steel grade	Rm MPa	Elongation A5(%)	Rm MPa	ReH MPa	Elonggation A5(%)
St45	≥550	≥5	≥520	≥375	≥15
20#	≥550	≥8	≥520	≥375	≥15
St52 (E355)	≥640	≥5	≥600	≥520	≥14
SAE1026	≥640	≥5	≥600	≥510	≥15
STKM 13C	≥550	≥8	≥520	≥375	≥15
Q345B	≥640	≥5	≥600	≥520	≥14
CK45	≥640	≥5	≥600	≥520	≥10

SOME TOLERANCE OF DIMENSION

ID size

ID deviation (mm)

+0.021

+0.033

+0.052

>30~50

+0.025

+0.039

+0.062

>50~80

+0.030

+0.046

+0.074

>80~120

+0.035

+0.054

+0.087

>120~180

+0.040

+0.063

+0.100

>180~250

+0.046

+0.072

+0.115

>250~315

+0.052

+0.081

+0.130

>315~400

+0.0527

+0.089

+0.140

PACKAGING AND SHIPPING

Please don’t worry that our products are packed, stored, transported according to the international regulation. We do care about the quality of our products; even some little details are paid attention to. We wrap the precision steel pipe with anti-rust paper and steel rings to prevent damage. Identification labels are tagged according to standard specification or customer's instructions. Special packing is available as per customer's requirement. Plus, our storage racks are made of wood. Any unwanted chemical reaction can be prevented.

OUR PROCESSING

OUR SERVICES

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

2. Flexible terms of payment by

3. Big discount for repeat customers

4. Smooth delivering procedure

5. Payment Terms: T/T , L/C And so on.

OUR TESTING

1.100% PMI,Spectro Chemical Aanlysis Test for Raw Material

2.100% Dimension & Visual Examination

3. Mechanical Properties Test Include Tension Test,Flaring Test (For Seamless tube/pipe)/ Flange Test (For Welded Pipe & Tube), Hardness Test ,Reversed Flattening Test

4.100% Hydrostatic Test or 100% NON-DESTRUCTIVE Test (ET or UT)

5.Radiographic Test for Welded Pipe (shall be accordance with specification,or shall be as agreed upon between the purchaser and vendor)

6.Straightness Test (optional)

7.Roughness Test (optional)

8.Intergranular Corrosion Test(optional)

9.Impact Test (optional)

10.Grain Size Determinations (optional)

NOTES : ALL THE TESTS AND INSPECTION RESULT NEED TO BE SHOWED IN REPORTS ACCORDING TO STANDARD AND SPECIFICATION.

APPLICATION

Application	Cold drawn or cold rolled precision seamless steel tubes for hydraulic pressure and pneumatic services.
	For Auto use,machinery use,oil cylinder tube,motorcycle shock reducer use,auto shock reducer inner cylinder,gas spring use etc.
	Seamless steel pipes for low and medium pressure boiler, high pressure boiler, ship-building,Liquid service, petroleum cracking, chemical fertilizer equipment,Drawing-oil-equipment and structure purposes.

FAQ

1. How long is your delivery time?

Our delivery time is generally25days.

2. What is the minimum quantity of products?

Our MOQ is 5Tons.

3. Where is the nearest port of shipment?

FOB: yantai or Qingdao

4. What are your terms of payment?

L/C at sight, or 30% T/T after order confirmed, balance after copy of B/L