Mild steel is a type of carbon steel that contains a low level of carbon. Otherwise known as low carbon steel, mild steel contains roughly between 0.05% and 0.25% of carbon by weight. This is opposed to high carbon steel, which can be composed of up to 2.5% carbon by weight. As mild steel doesn’t contain large amounts of any elements other than iron and ferrite, it is not an alloy steel.
| Carbon | Silicon | Manganese | Phosphorus | Sulphur |
|---|---|---|---|---|
| 0.15 max | 0.25 - 0.75 | 0.2 - 0.5 | 0.07 - 0.15 | 0.03 max |
| Aluminium | Copper | Cromium | Nickel | Iron |
| 0.015 - 0.06 | 0.25 - 0.55 | 0.5 - 1.25 | 0.65 max | Balance |
Corten is suitable for drilling and machining. You can reduce wear and damage to tools by reducing the fabrication speeds necessary on other mild steels. Drilling speeds can be reduced to 2/3 of standard mild steel speeds and to 3/7 of the speed for machining.
Corten can be cut in the same way as standard steel products by using shears or gas / flame cutting techniques.
Weathering steel is suitable for manual and mechanical welding, but, there are couple of pointers you need to remember. The weather resistance of Corten means that any welding consumables you choose need to have similar corrosion resistance and preferably be a good colour match too. On a single pass weld, mild steel electrodes can be used because the pick up from the base metal will help to get the desired colour match. If you are doing multiple pass welds, it is better to use low alloy electrodes to make sure you get a good colour and corrosion resistant match.
Back to topEN24T, also commonly referred to as 817M40T is a high strength engineering steel that has nickel, chrome, and molybdenum as its alloying elements. The addition of nickel gives the steel toughness, the chrome provides a depth of hardness and the molybdenum reduces the risk of temper brittleness that may occur during some temperature intervals.
The physical properties of EN24T makes this grade suitable for use in high strength machine parts, axles, components for use in high temperature environments such as oil refineries and power stations, manufacture of punches and dies, gears, shafts
This grade of engineering steel is supplied hardened and tempered to 'T' designation.
| C | Si | Mn | P | S | Mo | Cr | Ni | Fe |
|---|---|---|---|---|---|---|---|---|
| 0.36-0.44 | 0.10-0.35 | 0.45-0.70 | 0.035 max | 0.04 max | 0.20-0.35 | 1.00-1.40 | 1.30-1.70 | Balance |