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Seamless steel tubes cold rolled GOST 8734-78

Offer type: salePublished: 28.02.2015
Seller:Sergej Aleksandrovich
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Address:Ukraine, Kyiv

Seamless steel tubes cold rolled GOST 8734-78
Seamless steel tubes cold rolled GOST 8734-78.
This type of steel are cold and replacevariable pipe General purpose carbon and alloy steel manufactured outside diameter, wall thickness and length.

The assortment of pipes corresponds to GOST 8734-78.

Depending on the relationship of the outer diameter (DN) to the wall thickness (s) of the pipes are divided into:

osobennostyu DN/s over 40 and a pipe diameter of 20 mm and with a wall of 0.5 mm or less;

thin when DN/s from 12.5 to 40 and pipe diameter 20mm and less with the wall of 1.5 mm;

thick-walled when DN/s from 6 to 12.5;

isobutylidene when DN/s less than 6.

The length of the pipe shall be manufactured:

off-gauge length from 1.5 to 11.5 m;

length from 4.5 to 9M with extreme deviations in length + 10mm;

the multiple gauge length from 1.5 to 9 m), with allowance for each cut mm

Depending on the quality indicators of the pipe should be made of the following groups:

B - regulation of the chemical composition of quiet steel grades according to GOST 1050, GOST 14959, GOST 4543 and GOST 19281;

In - rationing mechanical properties, controlled by heat-treated samples and the chemical composition of steel grades according to GOST 1050, GOST 14959, GOST 4543 and GOST 19281. Standards mechanical properties shall comply with the requirements of relevant standards for steel;

D - without rationing mechanical properties and chemical composition, but with rationing ispytatelei gidravlicheskogo pressure;

E - after a special heat treatment. The steel grade, heat treatment and standards mechanical properties shall be established by documentation approved in the prescribed manner.

Pipes are made of heat-treated. Without heat treatment manufactured pipe, for which the ratio of outside diameter to wall thickness is 50 or more.

Cold pipe works well on a bend. Such pipes, small diameter, is widely used for making furniture and electric lighting fittings.