Steel is an essential part of our daily life and there are many different companies that are working on stainless steel products. Among this list, we have the best companies and Without steel, it would be impossible to build all the tall buildings and towers and unique pieces we see today. This combination of iron, limestone and several other materials is a key ingredient in the maintenance of the world's towers, bridges, and structures. This industry has a large number of steel producers able to achieve a high reputation in the industry through mass production. Here are some big companies that work on steel and steel products. JFE Holdings JFE Holdings was established in 2002 and is headquartered in Tokyo, Japan. With a market capitalization of 40.1 million dollars, the company has managed to find a significant position in the steel industry. 
Although the company initially invested in steel production, it is also active in other businesses such as metal engineering products, ships, aircraft production and real estate. The complex consists of three production lines, two of which are located on the east and west coasts of Japan, and the third line, called Chita, is smaller than the other two, but very technically advanced. Chita Center produces steel pipes and rebar. In addition to this, the company has an R&D department that develops superior technologies for steel production and high-quality steel products. wall Wall was founded in 1942 in Rio de Janeiro, Brazil. With a market value of $72.4 billion, the plant is considered a global brand in the steel industry. The factory's logistics activities include activities in the steel and mining sectors, making the sector considered the largest business in Brazil's the trade and economy. The Wall plant in South America is involved in the production and export of iron ore, iron slag, minerals, and manganese and is an important source of steel chain products such as rebar. The company has four broad investments in bulk materials, base metals, fertilizers, and logistics services. In addition, other products from the plant are nickel, iron ore, and iron slag, which are raw materials for the production of various steel products such as iron beams and rebar. The company also supplies metallurgical and thermal coal, iron, copper, platinum, potash, phosphate, cobalt and some other fertilizer nutrients. 
The maritime, port and rail industries have a great need for this type of logistics, which in itself is a reason to increase productivity in mining. Wall is considered a hot company to cooperate with and co-invest with other companies. Nippon Steel Sumitomo Metals Nippon Steel was established in 2012 in Fuji, Japan. Although the company is newly established, it is currently growing rapidly and ranks third in market capitalization with $67.5 billion in assets. The company has five main divisions in the areas of steel and rebar fabrication and production, engineering and construction, chemicals, major new non-ferrous materials and solvent systems. The company has made huge profits by reforming parent production and creating advanced technologies. POSCO POSCO Steel Company was established in 1968 in Posco, South Korea. With over 80 billion dollars in assets, POSCO is able to present itself as one of the world's best-known producers of steel and sections such as rebar. In 2015, almost 18,000 employees worked in the company. The title of the world's largest independent steel producer belongs to POSCO. Its products include hot and cold rolled as well as stainless and rebar products. The company was awarded the best standard and production quality among 36 other companies at the Steel Success Strategy Conference. ArcelorMittal ArcelorMittal was founded in 2006 in Luxembourg by Lakshmi Mittal. The company is the world's largest steel company with assets of DKK 112.3 billion. Silver Metal Company is a multinational company with operations in 19 countries and four continents with 54 small steel and rebar production companies. 
The company's success lies in the geographical expansion of its steel business so that it supplies steel and related raw materials to developed and advanced countries. The company also produces coal and iron ore and coordinates its business transactions with Barzeg. Kobe Steel Co., Ltd. Kobe Steel is one of the oldest companies in the steel industry, founded in Kobe, Japan in 1905. The company invests in the production of titanium and titanium alloys, steel rods and bars, steel ingots, castings and castings, cast iron, stainless steel pipes and other related steels. The company is also involved in electricity, construction machinery, electrical machinery, real estate, electrical materials and other fields. Kobe Steel's assets totaled $21.2 billion. Gerdau factory Gerdau is headquartered in Porto Alegre, Brazil. This plant is one of the most famous companies in the world's steel industry and is popular worldwide due to the extensive use of cast iron and other metals in the production of steel and metal products such as rebar and galvanized sheet. The company has assets of $24.8 billion. New core Corporation New core was founded in Charlotte, North Carolina in 1905. This company is the largest recycling company in the United States, so it is popular all over the world. The company is worth $15.2 billion and has three divisions in steel, rebar and raw materials. The factory produces products such as steel fasteners, steel beams, metal materials and building systems, prefabricated concrete rebars, steel frames and standard gratings, wire and mesh. Rebar is made by measuring and adjusting steel plates and strips. The facility recycles 1 ton of steel for every 2 tons and is actually the largest recycler in the US steel sector. 
steel products list among companies
There are many different kinds of steel products some of them are very favorite in the eyes of companies and among this list, we have steel bars. Due to the usages of these products in the market especially in the construction industry, they come in many different types. Rebar is one of the most widely used sections used in various industries including construction; many steel mills around the world are engaged in the production of this product. One of the main challenges buyers face at this stage is choosing the best brand, and one of the criteria that will help you choose the highest quality rebar is sales volume. High-quality steel is often referred to as the best-selling rod on the market. The main characteristics of high-quality steel bars are:
- Appearance and standard tread
- Resistance to pressure in different directions (this problem also depends on the hardness of the steel section.)
- Made of high-quality steel
- Weight, length and diameter depend on the size
- Resistant to weather changes and fire
High-quality steel bars can also be damaged by impact or strong pressure, but they exhibit greater resistance than ordinary products. One of the most important and most used steel sections in the construction industry is rebar. The invention of this type of steel created a huge revolution in the construction industry. It played a very important role in the construction of tall buildings and towers. The use of rebar is used to build columns and frames as well as stairs. And can also be used to build foundations. One of the most important uses of rebar in building construction is to take the pressure from the building in the foundation and transfer it to the soil or concrete foundation. In the past, wooden poles were used instead of steel poles. One of the reasons for this is the unavailability of ferrous metal. Working with iron was not a very simple and cheap task as mining and metal refining technology was not as advanced as it is today. 
But after the industrial revolution, the metal could be widely used in various industries. But the use of rebar is in the form of simple cylinders obtained by melting and shaping iron. Types of steel bars The steel is divided into two categories:
- Stainless steel rebar
- carbon steel rebar
Stainless steel rods are divided into different materials, the most common are: Rebar 201, 202, 304, 309, 310, 316, 321, 347, 420 and 430. Among the properties of this reinforcement, the following can be mentioned:
- Stainless steel rebar is one of the most expensive. It is eight times more expensive than epoxy-coated rebar.
- It is the best rebar available for most projects. But stainless steel is mainly used in engineering.
- But carbon steel rebar is recommended for those who have a reason to use it.
- According to tests, stainless steel rebar is 1500 times more resistant to corrosion than rebar. It is more resistant to damage than other steel bars.
Specifications for carbon steel rebar (carbon steel) This type of rebar, also known as low carbon steel rebar, is divided into the following 5 categories:
- Matt steel
- patterned
- epoxy coating
- Galvanized coating
- Reinforcement - Polymer (GFRP)
Matt (soft) rebar The properties of this rebar are as follows:
- The surface of this steel profile is matte and rounded. They vary in size from 6 mm to 50 mm.
- They are used for special purposes in concrete.
- The surface of ordinary steel bars is smooth and round.
- They are available in different sizes from 6 mm to 50 mm.
- Low carbon steel bars are used in special concrete. For example, dowels in expansion joints where the reinforcement must be wrapped in a paper or metal casing. They are used in shrink joints for roads and runways as well as for screw posts.
- It is easy to cut and bend them without damaging them. They are not recommended for building large structures such as bridges and other heavy structures due to slippage and insufficient strength of the bond between steel and concrete.
Analysis of low carbon steel bar
- Common primary rebars are introduced as Fe 410-S or Grade 60.
- The other grade is called Fe-410-o or grade 40.
- Medium strength steel is introduced as Fe-540-w-ht or grade 75.
Patterned steel bars These types of deformed bars have ribs, edges and grooves on the bar surface. This reduces problems caused by rebar sliding. And there is a proper connection between the concrete and the rebar. Compared to other rebars, it has higher tensile properties and is available in diameters from 6 mm to 50 mm. 
Types of steel bars TMT Rod (Thermo-Mechanical Rod) Thermomechanical steel bars are hot and have high resistance and are used for working in reinforced concrete. The international quality standards for steel bars are determined according to the properties of strength, flexibility, weldability, bending ability and so on. Properties of TMT rebar
- They are malleable and Qailst is very malleable.
- It has high strength and hardness.
- It is highly resistant to corrosion, high temperatures and earthquakes.
- They are affordable and safe to use.
- They do not lose strength in welded joints. Ordinary electrodes can be used to weld joints.
High resistance rebar Rebars are twisted and cold-formed with edges, ridges, protrusions, or deformations on their surfaces. High-strength steel bars are mainly used in the construction industry. These rods range in size from 4mm to 50mm. Features of HSD rebar
- The amount of carbon used in them is low. This gives it ductility, strength and good weldability.
- When used in concrete, they have high resistance and strength.
- Due to their lower carbon content, they have 100% weldability compared to regular rebar.
- They have high tensile strength and during construction, the rebar must be bent again. They are very effective.
- They are widely used in residential, commercial, and industrial buildings, bridges, etc.
- Very lightweight and high resistance. They are suitable for increased compression and increased tension.
Although rebar is relatively common, it has several advantages that make it one of the most reliable materials for structural applications. This understated tubular design with multiple ribbed patterns still helps create impact-resistant structures for many modern buildings today. The construction industry has long recognized the many advantages of rebar and its importance in building concrete structures. Also known as rebar, these simple and flexible materials are installed in buildings to provide structural support for columns, foundations, walls, panels and more.