Contents of the Composition of Dual-Phase (DP) steels, DP steel data sheet

The arrangement of the molecules in steel varies based on its composition and manufacturing technique. The different arrangements alter the various material properties of the steel. Dual-Phase (DP) steel is manufactured so that it contains two different molecular arrangements at the same time. The properties created through this process are most useful in the automotive industry. There are several different types of DP steel with slightly different compositions, but the contents are nearly identical.

1. Carbon

   • Carbon is the only material required to turn iron into steel; it acts as a hardening agent when added to the iron. DP steel contains 0.10-0.17 weight percent (wt%) of carbon. The carbon does cause the iron to become less ductile when forming steel; this means it is more difficult to shape and work. Steel becomes harder and less ductile as the proportion of carbon is increased.

   2. Silicon

   • DP steel contains 0.15-0.30 wt% of silicon; this is added to steel to increase the electrical resistivity. Silicon also hardens the DP steel slightly, but makes it more brittle. Silicon is less commonly found in steel alloys and only used when electrical resistivity is an issue.

   3.Manganese

   • DP steel contains 1.5-2.0 wt% of manganese. This is a common alloying agent for steel, not just DP steel; the manganese improves the tensile strength of the steel significantly when added and makes the steel more resistant to wear.

   4. Aluminum

   • DP steel is a "killed" steel; this means all of the oxygen within the steel is removed during manufacture. Aluminum is used in the process to remove the oxygen. DP steel contains 0.03-0.08 wt% of aluminum as a result of this process.

   5. Chromium and Molybdenum

   • DP steel contains 0.8-1.0 wt% of chromium and molybdenum combined. These ingredients improve the strength of the steel when used as alloying agents. Chromium and molybdenum are also added to improve the chemical resistance of the steel. Stainless steel gains its properties primarily through the addition of chromium.

   7. Niobium and Titanium

   • Some compositions of DP steel contain 0.05 wt% of a combination of niobium and titanium, although many compositions of DP steel do not contain either metal in the alloy. These serve to increase the strength of the steel when added.

   8. Sulfur and Phosphorous

   • DP steel contains up to 0.01 wt% of sulfur and 0.05 wt% of phosphorous. Unlike the other contents of DP steel, these are undesirable; sulfur and phosphorous cause the steel to become more brittle. The reason these are in the composition of DP steel is due to the difficulty of completely removing them from the alloy.

Dual-Phase steel data sheet

Download Dual-Phase steel data sheet here

Source: eHow.com