Product Description
Product Type | hollow bar, thick wall seamless steel pipe | ||
Size | Outer Diameter: 20-600mm Wall Thickness: 10-75mm | ||
Length:6-12m or cut to length | |||
Steel Grade | 20#, 35#, 45#, Q345B, 16Mn, 20Mn2, 25Mn, 30Mn2, 40Mn2, 45Mn2, SAE1018, SAE1020, SAE1045, 4140, 42CrMo, 32CrMo, 15CrMo, 20G, 15MnG, 20MnG, 15CrMoG, 12Cr1MoVG, St35.8 | ||
MOQ | 2tons | ||
Delivery Time | For stock size 3-7 days; for production size 7-30 days | ||
Details Images
Production Process
Seamless pipes grades and production methods
1. Round bar making Hollow Bar
according to customer's demanded material to produce the round bar, then making annealled heat treatment,then drill the hole as customer demanded inner diameter into the round bar, round bar piercing, making rough hole, then make precision processing to make outer diameter and inner diameter as requested.
1. Round bar making Hollow Bar
according to customer's demanded material to produce the round bar, then making annealled heat treatment,then drill the hole as customer demanded inner diameter into the round bar, round bar piercing, making rough hole, then make precision processing to make outer diameter and inner diameter as requested.
Any size hollow bar can be produced as demanded.
2. Hot rolled Hollow Bar
using hot rolled steel pipe billet to make heating and piercing, elongating, sizing and stranghtening, cooling, finally hollow bars finished, this is the type most commonly used. Because it is hot rolled, so cost is lowest, but it is suit for large quantity, for small quantity, have to make cold drawn or round bar piercing.
size: outer diameter 32mm- 499mm, wall thickness 4mm- 80mm
3. Cold drawn Hollow Bar
for outer diameter not over than 63.5mm, small size hollow bar, when demanded quantity is under 5 tons, usually make cold drawn hollow bar, using larger size hot rolled hollow bar to draw to the size demanded. some size can be finished only by one time drawing, but some other sizes might need twice or three times to finish drawing, it takes time, so the cost is higher.
cold drawn size outer diameter 32mm- 63.5mm
4. Hot- expanding Hollow Bar
For hollow bar sizes are special, not common sizes, have to use smaller thick wall hollow bar to hot expand to be larger size hollow bar, but the technical property for hot-expanded hollow bar will be lower than the original hollow bar.
2. Hot rolled Hollow Bar
using hot rolled steel pipe billet to make heating and piercing, elongating, sizing and stranghtening, cooling, finally hollow bars finished, this is the type most commonly used. Because it is hot rolled, so cost is lowest, but it is suit for large quantity, for small quantity, have to make cold drawn or round bar piercing.
size: outer diameter 32mm- 499mm, wall thickness 4mm- 80mm
3. Cold drawn Hollow Bar
for outer diameter not over than 63.5mm, small size hollow bar, when demanded quantity is under 5 tons, usually make cold drawn hollow bar, using larger size hot rolled hollow bar to draw to the size demanded. some size can be finished only by one time drawing, but some other sizes might need twice or three times to finish drawing, it takes time, so the cost is higher.
cold drawn size outer diameter 32mm- 63.5mm
4. Hot- expanding Hollow Bar
For hollow bar sizes are special, not common sizes, have to use smaller thick wall hollow bar to hot expand to be larger size hollow bar, but the technical property for hot-expanded hollow bar will be lower than the original hollow bar.
Size: outer diameter over 356mm.
Pipe processing service
steel pipe customized processing service, we can do deep fabrication according to drawings.
Bending, cutting, grooving, welding, painting etc
Package&Delivery
20GP: can load 25 tons max, steel pipe length should be 5800mm max.
40GP: can load 25 tonx max, steel pipe length should be 11800mm max.
Bulk Vessel: sea freight cheap, but total quantity need over 100 tons.
40GP: can load 25 tonx max, steel pipe length should be 11800mm max.
Bulk Vessel: sea freight cheap, but total quantity need over 100 tons.
Company Profile
Tianjin Emerson Commercial and Trade Co.,ltd is very professional on steel products with more than 10 years experience on steel, have large stock, make very fast delivery, and special sizes and small quantity can be supplied. OEM, ODM, customized fabrication with good service is supplied.
We are a dynamic and dependable company.You can count on us to supply the right grade and the right size at the right price - delivered right on time,every time.Our innovative approach means you get the benefit of state - of-the-art technology coupled with personal,professional service.The result is a business partner striving to meet your needs to help your business grow.
Δ High Quality
we can supply mill test certificate for the product,also can provide the third party inspection.
Δ Fast Delivery
we have large stock,and can do very fast shipping.
Δ Good Service
response and quote in time,supply quotation,contract,package,delivery and after sale onestep service.
Δ Various Products
steel plate,steel coil,steel pipe,round bar,stainless steel,hollow bar,steel structure,steel profile,steel fabrications etc, we can give you all the steel products you want.
Δ OEM Service
we can supply customized processing service,can do products accprding to your needs,also can design as customers' requirments.
we can supply mill test certificate for the product,also can provide the third party inspection.
Δ Fast Delivery
we have large stock,and can do very fast shipping.
Δ Good Service
response and quote in time,supply quotation,contract,package,delivery and after sale onestep service.
Δ Various Products
steel plate,steel coil,steel pipe,round bar,stainless steel,hollow bar,steel structure,steel profile,steel fabrications etc, we can give you all the steel products you want.
Δ OEM Service
we can supply customized processing service,can do products accprding to your needs,also can design as customers' requirments.
Other Products
Our company offers kinds of steel material and processing service.
Steel Coil: hot rolled/cold rolled/galvanized/galvalume/stainless/checkered/color coated steel coil;
Steel Plate:hot rolled/cold rolled/galvanized/galvalume/stainless/checkered/color coated steel plate;
Steel Pipe: welded/seamless/galvanized/stainless/square/rectangular steel pipe;
Round Bar: hot rolled/cold drawn/forged/carbon steel/stainless steel round bar;
Customized Processing Service: cutting/bending/welding/stamping/cnc machining.
Please feel free to contact me if you have any require,we will try our best to meet you needs.
Steel Coil: hot rolled/cold rolled/galvanized/galvalume/stainless/checkered/color coated steel coil;
Steel Plate:hot rolled/cold rolled/galvanized/galvalume/stainless/checkered/color coated steel plate;
Steel Pipe: welded/seamless/galvanized/stainless/square/rectangular steel pipe;
Round Bar: hot rolled/cold drawn/forged/carbon steel/stainless steel round bar;
Customized Processing Service: cutting/bending/welding/stamping/cnc machining.
Please feel free to contact me if you have any require,we will try our best to meet you needs.