astm a519 4140 seamless pipe 114.3 seamless steel pipe carbon hollow bar sizes list

can bend the steel pipe into special section, and do welding.

can cut steel pipe into demand length. 

painting steel pipe depend on demands.

1. Hot rolled seamless steel pipe
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
2. Cold drawn seamless steel pipe
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 me 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 16mm- 63.5mm
3. Hot- expanding seamless steel pipe
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.

astm a519 4140 seamless pipe 114.3 seamless steel pipe carbon hollow bar sizes list

  Tianjin Emerson Commercial and Trade Co.,Ltd has large stocks for the carbon steel and low alloy steel plates and sheets, especially have the thick plate and heavy plates on stock, also can provide the special material and large size steel plates, boiler and pressure vessel steel plate, marine steel plate, hot rolled steel plate for new production. Tianjin Emerson Commercial and Trade Co., Ltd also has large stock for hollow bars, thick wall seamless pipes and tubes. Tianjin Emerson Commercial and Trade Co.,Ltd can provide good service for customer, good quality products, fast delivery, and after-sale service, Tianjin Emerson hopes to build good cooperation with everyone interested.