ThePipingMart Blog Grades Domex 700 Steel – Composition, Properties, and Uses

Domex 700 Steel – Composition, Properties, and Uses

Domex 700 Steel

Domex 700, a high-yield strength steel, is gaining popularity worldwide. It is a low-carbon content steel used extensively in construction, agricultural equipment, transportation, and mining machinery. In this comprehensive guide, we will explore the numerous features of Domex 700, ranging from its composition and physical properties to its heat treatment and applications.

Domex 700 Composition

Domex 700 is a low-alloyed steel comprising carbon, manganese, silicon, sulfur, phosphorous, chromium, and nickel. It has a carbon content of 0.2 per cent, making it low-carbon steel. The presence of chromium and nickel improves its corrosion resistance properties, making it suitable for use in harsh environments.

Grade Al max B max C max Fe max Mn max Mo max P max Si max S max
Domex 700 0.015 0.0050 0.12 97 2.1 0.50 0.025 0.30 0.010

Domex 700 Physical Properties

Domex 700 has a 7.85 g/cm³ density and a tensile strength of 750-940 MPa. Its yield strength is between 700-880 MPa, which means it can withstand heavy loads and deformation without breaking. The elongation at breakage for this steel is 16%.

Domex 700 Mechanical Properties

In addition to the high yield strength, Domex 700 exhibits excellent toughness, formability and weldability. It can be cut and formed easily with the right tools and techniques and is an excellent choice for welding and joining operations. Its strength and flexibility make it easy to shape and join using cold-forming processes.

Ultimate Tensile Strength Yield strength Rp 0.2, min MPa Elongation at Break Impact Bend radius (Minimum)
750 – 950 MPa 700 MPa 10 – 12 % 71 J/cm²; -20°C 1.0 t – t(3mm; internal bend radius, 90°)

Domex 700 Uses

Domex 700 steel has extensive uses, primarily in the construction, agricultural equipment, mining, and transportation industries. It makes load-bearing structures, cranes and trailers, rail cars and other heavy machinery. Additionally, domains like the construction of pressure vessels where environments can be harsh and tough, application areas with extreme vibrations and rock-crushing jaws often use Domex 700 steel.

Domex 700 Hardness

Domex 700 is high-yield strength steel, which gives it exceptional hardness. After heat treatment, it can reach a Rockwell hardness of approximately 22 HRC. This means it can withstand heavy loads and deformations without bending or breaking.

Domex 700 Heat Treatment

The heat treatment process helps ensure that the steel exhibits appropriate mechanical properties. Upon heat treatment, Domex 700 steel gains increased strength and hardness. The exact heat treatment process varies depending upon its intended use.


Domex 700 steel is a low-carbon alloy used extensively in construction, transportation, and mining machinery. Its high yield strength, toughness, formability, and weldability make it versatile and easy to work with. If you’re searching for a steel alloy that exhibits exceptional mechanical properties and can withstand harsh environments, Domex 700 is a great option. We hope this comprehensive guide has shed light on the various features of Domex 700 steel, making your choice of steel easier and more informed.

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