ASTM4140 alloyed seamless steel pipeASTM4140
|Chemical Composition(%)||Mechanical Property|
|C||Si||Mn||S||P||Cr||Ni||Cu||Mo||Yield Strength||Tensile Strength|
|( σs )||( σb )|
|End Shape||Beveled end, plain end, vanished, or adding plastic caps to protect
the two ends as per customer's requirements|
|Surface||Oiled, Galvanized, Phosphate etc|
|Application||1. Automotive and mechanical pipes|
|2. Petroleum cracking pipes|
|3. High Pressure Boiler Pipe|
|4. Low and middle pressure fluid transportation pipeline|
|5. Chemical fertilizer equipment pipes|
|6. Heat exchanger pipes|
|Delivery||1. BK (+C)||No heat treatment after last cold forming process.|
|Conditions||2. BKW (+LC)||After last heat treatment there is a light finishing pass (cold
|3. BKS (+SR)||After the final cold forming process the tubes are stress relieve
|4. GBK (+A)||After the final cold forming process the tubes are annealed in a
|5. NBK (+N)||After the final cold forming process the tubes are annealed above
the upper transformation point in acontrolled atmosphere.|
|Package||1. Bundle Packing.|
|2. Plain end or vanished as per customer's request.|
|3. Wrapped in waterproof paper.|
|4. Sackcloth with several steel strips.|
|5. Pack in heavy tri-wall boxes.|
1 Are you a trading company or manufacturer?
Yes, Qingdao HKJ Was established in 2009, It is an enterprise
incorporating industry and trade. We have our own foreign trade
platform - Qingdao Haikejia International Trade Co.,Ltd.
2 How can I get the price?
We usually quote within 24 hours after we get your inquiry by
telling us the material, out diameter, wall thickness length,
quantity and application of the steel pipe which you need. If you
are very urgent to get the price, please inform us in email so that
we will regard your inquiry priority.
3 How can I get a sample to check your quality?
After price confirmation, you can require for samples to check our
quality.we will provide you the sample for free, however we could
only make sure the same material, the
dimension will be much similar as your request but not same. And
customer should afford the charge of shipment.
4 How long can I expect to get the sample?
The samples will be sent to you via express and arrive in 3-5 days.
ou can use your own consignee account or prepay us if you do not
have an account.
5 What about the lead time for mass production?
Honestly, it depends on the order quantity and the season you place
6 What is the Small Qty Process Charge.
It is the payment for customer whose order qty is less then Min
Order Qty. Because small qty of products should be processed same
in the production flow as big qty and the average cost would get
much higher than big ones. So there is a small Qty Process Charge
to ensure the profit of our factory and usually the amount of it is
7 Could the pipe be customized for us?
Yes. We are the professional manufacturer which has rich experience
in Precision Seamless and ERW Steel Pipe manufacturing.
We could print the logo and label under your requirements if you
need OEM products. Beside this,we still do some refined processes
like CNC cutting, chamfering, galvanization and tapping, if you
have detailed spec or drawing.Our production lead time is within
8 What is your terms of delivery?
We accept EXW, FOB, CIF, DDU etc. You can choose the one which is
the most convenient or cost effective for you.