Product News
-
Difference of Hot-rolled and Cold-drawn
Hot-rolled is based on the slab (mainly billet) as raw material, heated by a roughing mill and finishing mill group made of steel. From finishing the last one out of the hot strip mill by laminar cooling to the set temperature, the coiling machine rolled steel strip coils, steel roll cooled throu...Read more -
disadvantages of welded pipes
Welded steel pipe is continuous online production, the thicker the thickness, the greater the unit and dissolves equipment investment, the less it has economical and practical. The thinner wall thickness, its input-output ratio will be reduced. The advantages and disadvantages of the process of t...Read more -
Coefficient of expansion of precision steel pipe
Coefficient of expansion of precision steel pipe Check the method can be used in the annealing furnace soapy water to wipe each joint crevice, to see whether to run gas; places where gas is most likely to run into the annealing furnace tube and place the tube in place, this place seals are partic...Read more -
Low carbon steel weld ability
Because of the low carbon steel is with low carbon content, manganese, silicon content is also small, therefore, under normal circumstances will not be welded to produce severe hardening tissue or quenched structure. Low carbon steel welding joints plasticity and the impact good toughness, weldin...Read more -
Hot-dip galvanized (galvanizing) defects
Hot-dip galvanized defects: off, scratch, plaque passivation, zinc tablets, the thick side, the marks of the air knife, air knife scratches, exposed steel, inclusions, mechanical damage, the bad performance of steel substrate, wave edge, buckling,substandard size, embossing, the zinc layer thickn...Read more -
Features of Precision Tubes
Features of Precision Tubes Precision steel tubes is a kind of seamless steel pipe. Precision tubes features: 1. The cold-rolled precision steel tolerances and high precision, product precision control ± 5mm, outer wall finish, the surface oxide layer. 2. The cold-rolled precision steel comprehen...Read more