Sider ALLOYS
FERROALLOYS
Ferroalloys are used to achieve
precise properties in steel
Ferroalloys are added in steel to improve properties like tensile strength, ductility, fatigue strength and corrosion resistance.
Additionally, there can be several other tasks for ferroalloys like in refining, deoxidation, control of non-metallic inclusions and precipitates.
We can provide FeSi, FeCr HC, FeCr LC, FeSiMn, FeMn HC, FeMo, FeV, FeTi, FeW.
|
ALLOYING ELEMENT |
INFLUENCE ON STRUCTURE |
INFLUENCE ON PROPERTIES |
TYPICAL APPLICATIONS IN STEELS |
|
Mn |
Austenite forming, substitutional atom, carbide stabilizer |
Increases harden-ability, strength, toughness, hot workability |
Deoxidation with Si (Al), forms MnS, alloying element in low-alloyed steels up to 1.6%. Had.field steel 13%Mn, AISI 200 series stainless 5-10%Mn |
|
Cr |
Ferrite forming, substitutional atom, forms carbides |
Increases harden-ability, strength, corrosion resistivity |
In low-alloyed steels up to 2%Cr, in stainless steels 11-25%. Heat resistant steels, tool steels |
|
Ni |
Austenite forming, substitutional atom |
Increases strength, toughness, impact & corrosion resistance |
Case hardening steels up to 3.5%Ni Stainless steels 8-20%Ni Heatresistant alloys ~25%Ni |
|
Si |
Ferriteforming, substitutional atom |
Ferrite hardening |
Deoxidation, slagreduction; typically 0.3-0.6%Si. |
|
Cr,Mo,W Ti, Nb,V |
Carbide formers |
Increase hardness, strength, wear resist |
Tool steels, wear resistant steels |
|
Nb, Ti, v Ta,(B),Al |
Nitride formers Grain refinement |
Increase strength and ductility |
Fine-grained steels; High strength low alloyed HSLA steels |
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| Chemical composition | Si (%) | Mn (%) | Cr (%) | P (%) | S (%) | N (%) | C (%) | Al (%) | Mo (%) | Cu (%) | V (%) | Ti (%) | W (%) |
| FeSi | 75-77 | – | – | 0.03 | 0.02 | – | 0.05 | 1-1.5 | – | – | – | – | – |
| FeCr High Carbon | 1.0 | 2.0 | – | 60-65 | 0.03 | 0.03 | – | 8.0 | – | – | – | – | – | – |
| FeCr Low Carbon | 1.0 | – | 65-70 | 0.03 | 0.02 | 0,05 | 0.10 | 0.06 | 0.03 | – | – | – | – | – | – |
| FeSiMn |
14-16 |
60-65 |
– |
0.15 |
0.03 | – |
2.0 |
– | – | – | – | – | – |
| FeMn High Carbon |
1-1,2 |
70-75 |
– |
0.24 |
0.03 | – |
7-8 |
– | – | – | – | – | – |
| FeMo |
0.5-1.5 |
– | – |
0.05 |
0.03-0.1 |
– |
0.01-0.05 |
– |
67-70 |
0.4 |
– | – | – |
| FeV |
1.0-1.1 |
– | – |
0.05 |
0.01 |
– |
0.07 |
1.4-1.5 |
– | – |
78-80 |
– |
78-80 |
| FeTi |
3.0 |
– | – |
0.10 |
0.01 |
– |
1.0 |
6.5 |
– | – | – |
70 |
– |
| FeW |
1.0 |
– | – |
0.05 |
0.05 |
– |
0.10 |
– | – |
0.15 |
– | – |
75 |
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