effect of alloying elements in steel

Introduction about alloying elements in steel

1. EFFECT OF ALLOYING
ELEMENTS IN STEEL
(Mn, Si, Cr, Mo, V, Ti, Pb, Cu, Al & W)

2. MANGANESE (Mn)
•Alloy Elements in the STEELS: 0.3 –2%
•EFFECTS:
–Increase the Strength and Hardness.
–Increases hardenability
–Lower the critical temperature range
–Promotes an AUSTENTIC Structure
•APPLICATIONS:
–up to 2% manganese-Shafts, Gears, and connecting
rod

3. SILICON (Si)
•Alloy Elements in the STEELS: 2%
•EFFECTS:
–Improve the electrical and magnetic properties
–Improves Oxidation resistance
–Strengthened the low alloy steels
–Increases Hardanebility
•APPLICATIONS:
–Transformer cores, IC engine valves( high temperature
reistance)

4. CHROMIUM (Cr)
•Alloy Elements in the STEELS: 0.3 –4%
•EFFECTS:
–Increase the corrosion and oxidation resistance.
–Increases hardenability
–Increases high temperature strength
–Resist abrasion and wear
•APPLICATIONS:
–Medium & high carbon steels for gears , Axles, Shafts,
Springs, Ball bearings, Metal working rolls.

5. MOLYBDENUM (Mo)
•Alloy Elements in the STEELS: 0.1 –0.5%
•EFFECTS:
–Improve high temperature creep resistance
–Reduces temper brittleness
–Stabilizes carbides
–Increases hardenability
•APPLICATIONS:
–High speed Tool steels, and creep resistance steels.

6. VANADIUM (V)
•Alloy Elements in the STEELS: 0.1 –0.3%
•EFFECTS:
–Stabilizes carbides
–Raises the softening temperature of hardened steels
–Increase strength while retaining Ductility
–Promotes fine Grain size.
•APPLICATIONS:
–High speed steels

7. COPPER (Cu)
•Alloy Elements in the STEELS: 0.2-0.5%
•EFFECTS:
–Increases strength and corrosion resistance
•APPLICATIONS:
–Corrosion resistance in Architectural steels