CARBON STEEL
Delivering trusted steel solutions with unmatched quality and service across India.
Carbon Steel for versatile industrial applications.
Carbon steel is an iron–carbon alloy where carbon is the principal alloying element, typically present in amounts up to 2.5% by weight. Other alloying elements (Mn, Si, S, P) are present in small quantities to control properties, but do not dominate the steel’s characteristics.
Available Carbon Steel Grades
C45
MS STEEL
Practical advantages of Carbon Steel.
Carbon Steel for oil & gas applications.
Carbon steel is the most widely used material in the oil and gas sector.
Over 80% of all components (pipelines, process vessels, storage tanks, platforms, structural members, fasteners, etc.) are made from carbon steel.
Because of this, design and process adjustments are often made to allow the use of carbon steels rather than switching to costlier alloys.
Classification of Carbon Steels
| Type of Carbon Steel | Carbon Content (wt%) | Typical Properties | Common Applications |
|---|---|---|---|
| Low Carbon Steel (Mild Steel) | 0.05 – 0.30 | High ductility, toughness, easy welding, and low strength | Pipelines, structural steels, tanks |
| Medium Carbon Steel | 0.30 – 0.60 | Higher strength, moderate ductility, wear resistance | Shafts, axles, gears, machinery parts |
Chemical Composition of Carbon Steels
| Grade Type | C | Mn | Si | P (max) | S (max) | Fe |
|---|---|---|---|---|---|---|
| Low Carbon Steel (Mild Steel) | 0.05 – 0.30 | 0.40 – 1.00 | 0.10 – 0.40 | 0.040 | 0.050 | Balance |
| Medium Carbon Steel | 0.30 – 0.60 | 0.60 – 1.65 | 0.10 – 0.40 | 0.040 | 0.050 | Balance |
Mechanical Properties of Carbon Steels
| Grade Type | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| Low Carbon Steel (Mild Steel) | 370 – 500 | 200 – 250 | 25 – 40 | 120 – 180 |
| Medium Carbon Steel | 550 – 700 | 300 – 450 | 15 – 25 | 170 – 240 |
Heat Treatment of Carbon Steels
| Process | Low Carbon Steel | Medium Carbon Steel | High Carbon Steel | Ultra-High Carbon Steel |
|---|---|---|---|---|
| Annealing | 870 – 910 °C, furnace cool | 840 – 890 °C, furnace cool | 800 – 850 °C, furnace cool | 750 – 800 °C, furnace cool |
| Normalizing | 890 – 940 °C, air cool | 860 – 910 °C, air cool | 830 – 870 °C, air cool | 780 – 820 °C, air cool |
| Hardening (Quenching) | Rarely used | 790 – 840 °C, water/oil quench | 760 – 820 °C, water/oil quench | 750 – 800 °C, oil quench |
| Tempering | – | 540 – 680 °C (reduce brittleness) | 150 – 650 °C (as per hardness requirement) | 150 – 400 °C (caution: brittle at higher C) |
Supplying Carbon Steel across India.
The oil and gas industry, the construction industry, and the manufacturing sector continue to depend on carbon steels, which are cheap and available, and also possess versatile characteristics. By classifying them as low carbon, medium carbon, high carbon, and ultra-high carbon, engineers can select the suitable grade of pipelines, machines, tools, or structural elements.
The treatment of carbon steels enables them to offer the desired strength, hardness, ductility, toughness balance, and can, therefore, not be neglected in contemporary industrial uses.
Manjula Steels is a trusted supplier of high-quality alloy and industrial metals, delivering excellence across India.