News Center
China steel 20# round bars are medium carbon quenched and tempered structural steel. The steel cold plastic in general, annealing, normalizing than quenching and tempering to be slightly better. 20# carbon steel round bars have high strength and good machinability, after the appropriate heat treatment can be a certain degree of toughness, plasticity and wear resistance, material sources Convenience. China steel 20# forged and hot rolled round bars are suitable for hydrogen welding and argon arc welding, not suitable for gas welding. Preheat before welding, after welding should be to stress annealing.
Normalizing can improve the hardness of less than 160HBS rough cutting performance. After quenching and tempering treatment, China steel 20# bar have comprehensive mechanical properties to be optimized in other carbon structural steel, but the steel hardenability is low, the water critical quenching diameter of 12 ~ 17mm, water quenching cracking tendency. When the diameter is greater than 80mm, the quenched and tempered or normalized, its mechanical properties are similar to the medium and small mold parts after quenching and tempering treatment can get a higher strength and toughness, and large parts. When the normalizing treatment is appropriate, China steel 20# carbon steel round bars and flat bars are usually used in the quenched or normalized state.
China Steel 20# Bars Size Available:
Technique: forged, cold drawn and hot rolled
20# Round Bars: diameter size 10mm to 2000mm
20# Flat Bars: 10mm to 1000mm
20# Square Bars: 20mm to 800mm
Finish: bright, annealed, black, pickled and coated
GB T 5312 Carbon and carbon-manganese steel seamless steel tubes and pipes are mainly for ship use, also known as shipbuilding steel pipes. Under GB T 5312, there are mainly 5 steel grades: grade 320, 360, 410, 460 and 490. Each grade covers three levels: I, II, III.
Angle steel, commonly known as angle iron, is a long strip of steel whose sides are perpendicular to each other. There are equal angle steels and unequal angle steels. The two sides of equal angle steel are equal in width. The unequal angle steel is also known as L shape profile steel.
Flat bar steel can be produced according to the user's needs, with fixed thickness, width and length. It can reduce the cutting process for users, reduce the consumption of labor and materials, and also reduce the processing loss of raw materials.
Bulb flat steel for shipbuilding
The bulb flat steel is a kind of medium section material which is mainly used in the field of shipbuilding and bridge building, and the shipbuilding bulb flat steel is an auxiliary medium section material for shipbuilding.
The steel for shipbuilding and oil platform---FH40, is the high tensile strength steel.The shipbuilding steel FH40 is the Hull structural steel.We can provide FH40 shipbuilding steel plate price.
The steel for shipbuilding and oil platform---EH40, is the high tensile strength steel.The shipbuilding steel EH40 is the Hull structural steel.We can provide EH40 shipbuilding steel plate price.
If you are interested in our company or products, welcome to visit our company or local offices; you can also get contact with us through online consulting, demand table submission, e-mails and telephones. Our staff shall wholeheartedly provide product information, application knowledge and good service for you.
BBN SHIP STEEL FACTORY
