Get A Quote

Primary and secondary steel making process - Comaron

Primary Steel versus Secondary Steel

  • Iron is considered as one of the hardest metals in the world. However, it drawback is that it easily gets rust. But, its alloy, steel prepared with carbon carries inordinate amount of strength and also is exempted from corrosion. Steel is the world's most significant engineering as well as construction material. It is applied in every aspect of our lives; in cars in addition to construction products, refrigerators plus washing machines, cargo ships as well as surgical scalpels. It can also be recycled over and over once more without loss of property.
  • Statistics illustrate, in fact, that over 1.7 million tons of steel are formed each year. While there are different kinds of steelmaking processes, nevertheless, the two most common contain primary and secondary.

Know About How to Calculate TMT Steel Bar Weight

Primary Steelmaking:

Primary steelmaking includes the application of a blower to force oxygen by molten iron, thereby dropping its carbon content while afterwards converting it into steel. Also acknowledged as basic oxygen steelmaking, it was in fact invented in the mid-1900s by Swiss engineer Robert Durrer. Through the help of his team, Durrer led the way to primary steelmaking in 1948. He originated that by forcing oxygen by molten iron, the carbon content of the iron fallen. Therefore, he was able to easily create steel thru raw pig iron using the primary steelmaking method.

  • Research displays that forcing oxygen through molten iron decreases its carbon content by roughly 0.5% to 1.5%. The oxygen activates a chemical reaction acknowledged as oxidation that pulls down the carbon content of the iron. As this content drops, the iron in effect turns to steel.

Secondary Steelmaking:

  • Secondary steelmaking isn’t as widely held as its primary complement. Even so, it still ranks as one of the most general ways to yield steel. What is secondary steelmaking precisely? Also acknowledged as electric arc furnace steelmaking, this steelmaking lives up to its namesake by depending on on an electric arc to melt scrap iron. Afterwards the scrap iron has been melted; it’s blended with carbon and transformed into steel.
  • By way of secondary steelmaking, a refractory-lined vessel is employed as the furnace. The furnace is also prepared thru a roof that insulates the scrap iron as it’s heated. The describing characteristic of secondary steelmaking, nevertheless, is its application of an electric arc. Earlier, primary steelmaking makes use of a blower to force oxygen by molten iron, while secondary steelmaking is characterized by the application of an electric arc. The electric arc is capable to heat up the scrap iron until it attains a molten state. Moreover, it’s significant to note that primary steelmaking doesn’t liquefy the oxygen. It merely blows oxygen by the molten iron.
  • Although it’s most normally performed thru scrap iron, secondary steelmaking can create large yields of steel. According to a research, secondary steelmaking can yield about 100 tons of steel every 40 to 50 minutes. On the other hand, primary steelmaking, obviously, can also harvest large yields.

TMT bar Segment:

  • Steel is compulsory in almost all construction buildings vacillating from residential to commercial. Even steel structure constructions have started to gain extra followers among construction experts and clients equally. Since steel has turned out to be such an integral part of the construction planning process, it is vital to learn the kinds of steel. Steel can be grouped into TMT as well as TMX. TMT bars are at that point again categorized into Primary and Secondary, which are again allocated into grades such as Fe 415, Fe500, Fe500D, Fe550D, Fe550.

Know about the Diameter of TMT Steel Bar

  • Difference between Primary as well as Secondary TMT bars:

Primary steel:

  • It is obtained from a steelmaking process recognized as the Basic Oxygen Furnace method (BOF). In this technique, the iron ore is altered into iron billets employed to create the steel bars.

Secondary steel

  • Secondary steelmaking is generally performed in an electric arc furnace. The chief raw material used to manufacture the bars is scrapping steel. That is why, it has been given the name secondary steel.

Raw material

  • Secondary steel makes use of re-melted scrap which is cast into ingots. The low refined process can yield impure secondary steel through the presence of detrimental elements which makes the bars extremely risky and insecure to use.
  • Primary steel comprises fewer impurities contrasted to secondary steel although the strength of both the steel bars can be the identical. It is essentially manufactured from incorporated steel plants.

Process technology

  • Secondary bars are typically re-rolled in a locally finished rolling mill. Thus giving it uneven properties
  • Primary bars are completed from world-class expertise on a high-speed fully automated mill thru horizontal as well as vertical stands.

Rib pattern

  • The ribs in secondary steel are completed using the local rib cutting course done by hand tools. In turn, this process gives it a varying rib area which guides to poor bonding thru the concrete.

    In primary steel, there are homogeneous ribs with deeper grooves prepared on CNC Machine. Thus, it gives it maximum rib area, offering a strong and long-lasting bond by way of concrete, forming stronger structures.


  • Primary steel is costlier as evaluated to the two, because of the application of iron ore directly. As a result the percentage of quality steel manufactured is more in primary contrasted to secondary. Product quality as well as cost of production is also much upper in primary steel

Inference – TMT bars

  • Both primary and secondary TMT bars encompass a low percentage of Sulphur and Phosphorous as well as are greatly acceptable for all types of building. It helps in conserving the steel and resisting earthquake shocks in yet to coming events. Primary Steel TMT bars are vastly ductile, fire-resistant, and escalate the weldability contrasted to secondary steel.
  • By reason of the innovations in the steel making course, there have been developments in the way Branded Secondary Steelsare produced. For residential homes primary steels are chosen but if you have good opportunities presented in branded secondary steel. It will save you some charges.
  • For commercials likewise, high rise buildings, it is always decent to go with primary steel, or apply grades such as Fe500D and Fe550D, although the “D” stands for ductility it provides the steel bars an upper percentage of elongation.


Visit for Top TMT Steel Bar in India

Know more

Tmt Bars is used when

Building Superstructure

Lot of Material Required to build Super structure. Comaron Gurgaon provides you all the product related to Super structure for any construction.

Laying Down Foundation

Foundation work is important for any construction. Comaron Gurgaon provides complete Solution for Foundation work