Product Details

Product Description

Article	carbon cold drawn seamless 21020 steel tube
Surface	according to the customer’s acquirement
Length	1m - 6m or as your requirement
W.T.	2-30mm
O.D.	30-250mm
Application	Vehicles, engineering machinery hydraulic chassis, air piping system, etc
Packing	We usually bundle with steel strips ,branding parcel ,wooden box
Terms conditions	CIF,CFR,FOB
Payment	should be 30% in advance by T/T and the balance upon B/L copy or L/C.
Delivery Time	25 days after received the deposit by T/T
Note	we can produce other standard as the customers' requirement

ABOUT THE TOLERANCE

Size of I.D	I.D Tolerance			Tolerance of wall thickness
Size of I.D	H8	H9	H10	±7.5% >210mm ±10%
30	+0.0330	+0.0520	+0.0840
>30-50	+0.0390	+0.0620	+0.1000
>50-80	+0.0460	+0.0740	+0.1200
>80-120	+0.0540	+0.0870	+0.1400
>120-180	+0.0630	+0.1000	+0.1600
>180-250	+0.0720	+0.1150	+0.1850
>250-315	+0.0810	+0.1300	+0.2100

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

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

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 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.

Company Information
we are the top 5 manufacture of precision seamless steel tube in China ,and we have passed ISO 90012008 verified certification ,our company mainly produces various specification cold finished steel tube which are widely used in hydraulic cylinder ,automobile ,oil drilling ,textil machinery ,engineering and so on ,if you are interested in our products welome to our company to visting and negotiate business .

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.

CERTIFICATE