Carbon steel, an iron-carbon alloy with a carbon content of up to 2.1% of the steel’s total weight, is one of the primary categories of steel.
• Mild or low carbon steel has a carbon content of 0.05 to 0.26 percent,
• Medium carbon steel has a carbon content of 0.29 to 0.54 percent,
• High carbon steel has a carbon content of 0.55 to 0.95 percent with very high carbon steel having a carbon content of 0.96 to 2.1 percent.
As the carbon percentage content rises, steel has the ability to become harder and stronger through heat treating; however it becomes less ductile. Regardless of the heat treatment, a higher carbon content reduces weld-ability. In carbon steels, the higher carbon content lowers the melting point.
Due to its high versatility, carbon steel has a broad range of applications and has been employed ubiquitously in a range of industries, especially in the oil, gas, and petrochemical sectors.
| Materrial No. | DIN NORM | SAE AISI | CHEMICAL COMPOSITION ( % ) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| C | Si max. | Mn | P max. | S max. | Cr max. | Ni max. | Mo max. | Cr+Mo+Ni | |||
| 1,0301 | C 10 | 1010 | 0,07 – 0,13 | 0.40 | 0,30 – 0,60 | 0,045 | 0,045 | – | – | – | – |
| 1,0402 | C 22 | 1020 | 0,17 – 0,24 | 0.40 | 0,40-0,70 | 0,045 | 0,045 | 0.40 | 0.40 | 0.10 | <0,63 |
| 1,1178 | C 30 | 1030 | 0,27-0,34 | 0.40 | 0,50-0,80 | 0,045 | 0,045 | 0.40 | 0.40 | 0.10 | <0,63 |
| 1,0501 | C 35 | 1035 | 0,32 – 0,39 | 0.40 | 0,50 – 0,80 | 0,045 | 0,045 | 0.40 | 0.40 | 0.10 | <0,63 |
| 1,0511 | C 40 | 1040 | 0,37 – 0,44 | 0.40 | 0,50 – 0,80 | 0,045 | 0,045 | 0.40 | 0.40 | 0.10 | <0,63 |
| 1,0503 | C 45 | 1045 | 0,42 – 0,50 | 0.40 | 0,50 – 0,80 | 0,045 | 0,045 | 0.40 | 0.40 | 0.10 | <0,63 |
| 1,1206 | C 50 | 1050 | 0,47-0,55 | 0.40 | 0,60 – 0,90 | 0,045 | 0,045 | 0.40 | 0.40 | 0.10 | <0,63 |
| 1,0601 | C 60 | 1060 | 0,55 – 0,64 | 0.40 | 0,60 – 0,90 | 0,045 | 0,045 | 0.40 | 0.40 | 0.10 | <0,63 |
