Product Details

ABOUT OUR COMPANY ----

we are the top 5 manufactre of precision seamless steel tube in CHina , we have passed ISO verified certificate ,our company mainly produces various specification cold finished steel tube ,which are widely used in hydraulic cylinder ,automobile ,oill drilling ,
textil machinery ,engineering machinery and so on .so if you are interested in our product welcome to our company to visting and negotiate business .

Product Description

Production Details: cylinder honed precision seamless tube st37.4 din 2391

Grade:	20#(CK20,AISI1020),45#(CK45,AISI1045),Q345,ST52(16Mn,Q345D), 42CrMo,25Mn (STKM13C-T),27SiMn.etc cold drawn seamless pipes
ID:	50-250mm
ID tolerance:	H8,H9
Surface roughness:	Ra 0.02—0.4μm
Final supply condition:	cold drawn and stress-relieved(BK+S)
Machining allowance:	0.5-1.5mm
Wall thickness:	10%×ID

Mechanics performance:
Material	Tensile strength	Yield strength	Elongation	Hardness
CK20/20#/AISI1020	>520 N/ mm2	>375 N/mm2	>15%	>85HB
CK45/45#/AISI1045	>600 N/ mm2	>520 N/ mm2	>15%	>85HB
ST52/16Mn/Q345D	>600 N/ mm2	>520 N/ mm2	>15%	>85HB
25Mn/STKM 13C-T	>600 N/ mm2	>530 N/ mm2	>15%	>85HB

Variety :
Processing	Cylinder Diameter	Straightness	Size Accuracy	W.T/mm	Inner Bore Roughess
Cold drawn/cold rolled	ID30-250	0.3	H9-H11	±10%	0.4~1.6um
Honed tube	ID50-250	0.3	H7-H9	±10%	<0.4um

Tolerance on ID:
No.	Inside diameter (mm)	ID machining allowance (mm)
1	300-80	0.5-0.8
2	81-125	0.7-1.1
3	125-200	0.9-1.2
4	200-250	1-1.5
Other dimension can be customize

Packaging & Shipping

packaging details: standard packing with plastic caps and starpped bundles,standard wheight approx 1500Kg

delivery details: 15 days after receiving downpayment or L/C or as your request

Our Services

Our Sercices:

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 processing

ABOUT OUR CERTIFICATION

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.