HRB500 hot rolled ribbed steel bars

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That is the new standard name for HRB500 steel, grade four steel as the old name, as a kind of hot rolled ribbed bar. In the construction industry, four screw steel is the old saying.

Hot rolled ribbed steel grades by HRB and number of yield points minimumcomposition. H, R, B respectively (Hotrolled), hot rolled ribbed steel bar(Ribbbed), (Bars) the three word's first letter English.


Hot rolled ribbed steel bar is divided into HRB335 (the old number is 20MnSi),HRB400 (the old No. 20MnSiV, 20MnSiNb, 20Mnti), HRB500 three brands.

Hot rolled bars of fine grains in the grades of hot rolled ribbed bar after Englishabbreviation "fine" English (Fine) the first letter. Such as: HRBF335, HRBF400,HRBF500.

A suitable grade higher requirements for seismic structures: add E in the existing brands after (for example: HRB400E, HRBF400E

The main purposes

HRB500 grade steel in strength, ductility, high temperature resistance, low temperature performance and seismic performance and fatigue performanceare better than HRB400 has greatly improved, mainly used in high-rise and super high-rise building, long span bridges, high standards of construction, is an international engineering standards recommended actively and has been widely used in developed countries products, it shows that the application ofpractice HRB500 steel works, can save a lot of steel, and has obvious economic benefit and social benefit.

The main origin

Screw thread steel producers in China are mainly distributed in North and northeast, North China area such as Shougang, Tang Gang, Xuan Steel,bearing steel, Shanxi Zhongyang steel plant, Baoding Purui the steel, the northeast area such as resistant, Tai, realize, these two areas account for about 50% of the total output in the screw thread steel.

The difference between the screw thread steel and round steel bar is provided with longitudinal ribs and transverse ribs surface, usually with two longitudinalribs and transverse ribs along the length direction of the uniform distribution.Screw thread steel belongs to the small steel steel, mainly used in reinforced concrete building components of the skeleton. In use requires a certainmechanical strength, bending deformation properties and process of welding performance. Screw thread steel billet production raw material for the carbon structure steel smelting processing sedation or low alloy structural steel,finished steel for hot rolling, normalizing or hot-rolled state of delivery.


Nationwide, the annual if 20000000 t two screw thread steel is four level(HRB500) to replace, can save more than 5000000 t screw thread steeldosage. Equivalent to an annual consumption of iron ore 4000000 ~800 million T, save standard coal 1670000 ~335 million T, less consumption of fresh water 9600000 ~1740 million m3, to reduce dust emissions of sulfur dioxide emissions reduction of 750~1500t, 625~1250t, energy saving and emission reduction effectiveness is huge, consistent with the low carbon environmental protection concept of current international society pay more and more attention.

The promotion of the work

In order to make better performance, more economical and four screw steelproducts of low carbon environmental protection at home and rapidly applied,gradually to replace the two screw steel low level, should do the following aspects of work:

1 wide publicity to introduce four screw steel composition, properties and their own advantages, strengthen the construction design institute relevant indexes of four screw steel chemical composition, mechanical properties and welding performance of the understanding, promote the use of the design of the construction project, to lay a solid foundation for the four screw steel market promotion.

Each of the 2 key projects on strengthening highway, railway, bridge, and a series of infrastructure projects, do a good job of key projects of the bidding work, the realization of the four screw steel supply breakthrough from thelarge-scale key projects, the formation of a demonstration effect on other common construction project and the real estate industry, and graduallypenetrated into all fields of thread steel application, so as to fully replace thelow grade screw thread steel.

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Q:What is the difference between rebar and round steel?
The difference between Jinzhong rebar and round bars: we can from the surface can be seen from the thread steel and round steel bar, we identify the next time don't let yourself do not understand the trouble, do not know how the difference.
Q:What does "4EDT6" mean on thread steel?
It is a long strip of steel with a hollow cross section. It can be divided into round tube, square tube, hexagonal tube and all kinds of special-shaped section steel tube according to its sectional shape. According to the different processing technology, seamless steel pipe and welded pipe can be divided into two categories.
Q:8 mm thread steel, how much is a bundle?
Steel is commonly known as hot rolled ribbed bar, belonging to the small steel steel, mainly used for steel reinforced concrete structure frame. In use, some mechanical strength, bending deformation property and welding performance are required.
Q:What is the sign of steel rebar
At present, China's iron and steel products implementation standards are national standards (GB, GB / T), industry standards (YB), local standards and enterprise standards
Q:What are the marking of the steel bars on the mills? Which factory is the 2LG16 thread?
In the steel mills logo is a symbol to a combination of numbers and letters, according to the strength of steel grade (with digital sign) + mills (referred to as letters marked) + bar diameter (with digital sign) according to the order of size at a certain spacing bar on one side of the uniform by Mark steel the strength grade of the number 2 (two steel), 3 (three steel), 4 (four steel) and other steel label; referred to in letters, such as LG (Lai Gang), JG (Ji Gang), KG (Kunming); diameter of steel bar by the number 12, 14, 16... 25, 28... Etc.. For example, the steel produced by Jigang has a diameter of 22 and the strength grade is 3 grade. The steel mark is 3JG22.
Q:What does it mean to have 22 4GJ on the threaded steel?
The letters on the reinforcement are registered plant names or trademarks. The top figures on the bar represent the grade of the reinforcement, such as 3 for grade 2 steel, 4 for grade 3 steel, and 5 for grade 4 steel. The numbers in the back represent the specifications of the bars, and the letters between grades and specifications represent the steel manufacturer.
Q:Why is the price of screw steel affected by iron ore and coal?
Just now the manufacturing needs to consume iron ore and gas energy, the cost goes up, the price certainly changes
Q:Does the grade three thread steel with "E" have the same information price as the ordinary three grade thread steel? Is there a big difference?
Hello, with E thread steel is seismic rebar, without E is the common thread steel, general seismic thread with E was higher than that of ordinary steel prices, the price difference between 50 and 100 yuan, according to the specific market situation.
Q:How to judge the quality of thread steel?
Sampling sample. Do tensile, bending, and impact tests.
Q:Are rebar bars = rebar?
Generally speaking (not absolute circle) steel is usually made of plate steel as the main form of packing, while threads are usually packed in straight strips.Turn left and turn right |

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