How Is Quenched Steel & Tempered Steel Made?

What is tempered Steel or quenched Steel?

The Steel of high strength and which is abrasion-free is commonly called quenched or tempered Steel. It is a highly resistant Steel with high fabrication qualities. It also possesses Mechanical properties as it is subjected to various processes for increasing the hardness and the strength of the Steel. The procedures are called quenching and tempering, and hence comes the name tempered or quenched Steel.

How is the quenching of Steel done?

In quenching, the Steel is heated, and an immediate cooling follows it in water comma oil and force. Over a certain period, the Steel has to be heated below the critical point to achieve effective tempering of it. And then it needs to be cooled at a special cooling rate in still air. The forced air mostly consists of Nitrogen. There are various parameters such as heating temperature, cooling method, cooling speed, which are monitored and controlled during the process of quenching the Steel. The formerly mentioned parameters independent of the hardness and the mechanical properties of the desired Steel.

Why is Steel quenched or tempered?

Steel is quenched or tempered to attain a higher toughness and ductility. It decreases the hardness of the Steel by the end of the quenching process. The Steel achieves less ductility and becomes more brittle after the process of tempering, and thus, tempering completely eradicates the hardness of the Steel. Hence, the quenching of the tempering of the steel makes it harder and more robust.

What are the different types of quenched and tempered Steel?

Quenched and tempered Steel can be segmented into three different varieties.

  • Grade 800:

It is a hard and abrasion-resistant Steel. It is an appropriate carbon percentage for optimizing welding. When low hydrogen consumables are provided this type of tempered and quenched Steel can be welded into itself as well as other grades of Steel

  • Grade 400

This type of quenched and tempered Steel can be successfully cold-formed to entirely stop this type as it is also highly hard and abrasion-resistant.

  • Grade 500:

This type of quenched and tempered steel has medium carbon high hardness. It is also abrasion-resistant Steel. It is mostly known for its long shelf life. The typical applications of this type of quenched and tempered Steel are dump trucks lines, earthmoving buckets, cutting edges, and ground engaging tools. 

What are the most common applications of quenched and tempered Steel?

Constant tempered Steel is used in various industries. It has multiple applications such as

  1. Storage tanks 
  2. Bridges and high-rise buildings
  3. Excavator and loader buckets
  4. Deflector plates 
  5. Gear wheels 
  6. Cutting edges
  7. Earthmoving buckets 
  8. Dump truck wear liners 
  9. Chutes
  10. Low Loader Trailers

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