Product Details

Product Description

commodity name : cold drawn annealing seamless 4130 steel tube

Dmension	O.D.30-250mm W.T.:2-30mm L: according to the customer’s need
Steel Grade	10#,20#,45#,16Mn, ST35, ST37,ST37.4,ST45,ST52,ST52.4, E255,E355,Q345 etc
Standards	DIN /ASTM /GB/ EN/ etc
Delivery Condition	NBK(+N), GBK(+A), BK(+C) ,BKW(+LC) ,BKS(+SR)
Application	Automotive pipeline system; hydraulic system of diesel engine and engineering machinery; hydraulic system of locomotive, aerospace and aviation, shipbuilding and various machinery; metal processing of wind power equipment;
Surface treatment	According the customer’s acquirements
Packing		We usually bundle with steel strips ,branding parcel or wooden box outside ,or according to the customer’s need
Certificate		ISO 9001:2008
Basic Inspection		Chemical analysis ,mechanical testing, eddy current test and ultrasonic

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

Company Information

we are the top 5 manufacture of precision seamless steel tube ,and we have passed ISO 9001 2008verified certification ,our company mainly produces various specifications cold finished steel tube ,which are widely used in hydraulic cylinder ,oil drilling ,textil machinery , engineering machinery ,and so on .welcome to our company to visiting and negotiate business .

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.

Packaging & Shipping

(1)Delivery time: In 20 days or according to client's requires

(2)Trade terms: EXW/FOB/CIF etc

(3)Payments: T/T or L/C or according to client's requires

(4)Port: Yantai or Qingdao