Достаточно мгновения, чтобы стать героем, но необходима целая жизнь, чтобы стать достойным человеком.


Поль Бриола


Главная Ferrochromium 
Ferrochromium

Ferrochromium

Ferrochromium is an alloy of iron and chromium, used for alloying of steel and alloys.

Ferrochromium Ferrochromium Ferrochromium

The range of chromium alloys is very large.

There are 17 grades of ferrochromium and 5 grades of metal chromium. Alloys are differed mainly by the carbon content which differs from 0.01 to 8%. The lower is carbon content the more expensive is alloy and more complicated the technology of its manufacture.

Carbon free and low carbon ferrochromium is used for production of stainless steel and various alloys.

Carbonic ferrochromium is produced from chrome ore with Cr2O3 content up to 62%.

GOST 4757 - 91 (ISO 5448 - 81)

1.Chemical composition. Low carbon ferrochromium
Grade (GOST) Fraction of total mass, %
Cr C Si P S Al
not less than max
FeCr001А 68,0 0,01 0,8 0,02 0,02 0,2
FeCR001Б 0,03
FeCr002А 68,0 0,02 1,5 0,02 0,02 0,2
FeCr002B 0,03
FeCr003А 68,0 0,03 1,5 0,02 0,02 0,2
FeCr003B 0,03
FeCr004А 68,0 0,04 1,5 0,02 0,02 0,2
FeCr004B 0,03
FeCr005А 65,0 0,05 1,5 0,03 0,02 0,2
FeCr005B 0,05
FeCr006А 65,0 0,06 1,5 0,03 0,02 0,2
FeCr006B 0,05

Note. According to customer’s request the low carbon ferrochromium is produced as follows:

  • with fraction of total mass of Si max. 0,2; 0,3; 0,6% for grades FeCr001А, FeCr001B; max. 0,2; 0,3; 0,6; 0,8; 1,0% for grades FeCr002А, FeCr002B, FeCr003А, FeCr003B, FeCr004А, FeCr004B, FeCr005А, FeCr006А, FeCr010А, FeCr 015А; max 1,5% for grade FeCr025А;
  • at that ferrochromium of grades FeCr001А, FeCr001B, FeCr002А, FeCr002B, FeCr003А, FeCr003B, FeCr004А, FeCr004B is allowed to be produced with fraction of total mass of Cr not less than 65%;
  • with fraction of total mass of phosphorus, max. 0,02% for grades FeCr005А, FeCr006А, FeCr010А;
  • with fraction of total mass of nitrogen, max. 0,04; 0,03; 0,02; 0,01 % and aluminium, max 0,1 % for grades FeCr001А, FeCr001B, FeCr002А, FeCr002B, FeCr003А, FeCr003B, FeCr004А, FeCr004B, FeCr005А, FeCr010А;
  • with fraction of total mass not less than 60% and silicon 6,0-12,0% for grades FeCr005А, FeCr005B, FeCr006А, FeCr006B, FeCr010А, FeCr010B, FeCr015А, FeCr015B, FeCr025А, FeCr025B;
  • with fraction of total mass not less than 90 %, phosphorus max. 0,01 % for grades FeCr003А and FeCr004А.

Low carbon nitrated ferrochromium
Grade (GOST) Fraction of total mass, %
Cr C Si P S Al N
not less than max not less than
FeCrN100А 65,0 0,06 1,0 0,02 0,02 0,2 1,0
FeCrN100B 0,03
FeCrN 200А 65,0 0,06 1,0 0,03 0,02 0,2 2,0
FeCrN200B 0,04
FeCrN400А 65,0 0,06 1,0 0,03 0,04 0,2 4,0
FeCrN400B 0,04
FeCrN600А 60,0 0,03 1,0 0,03 0,04 0,2 6,0
FeCrN600B 0,04

Note. At customer’s request low carbon nitrated ferrochromium is produced: with fraction of total mass of carbon max. 0,02% for all grades; max 0,03% for grades FeCrN100А, FeCrN100B, FeCrN200А, FeCrN200B, FeCrN400А, FeCrN400B; with fraction of total mass of aluminum max. 0,1% for all grades.

2. Size.

Ferrochromium is supplied in pieces 20 kg max or in form of crushed and sifted particles. High carbon ferrochromium is allowed to be produced in pigs 30 kg max.

Main requirements.
Size grade Piece dimensions, mm Max fraction of product’s total mass, %
oversize undersize
1 100 - 315 10 20
2 50 - 200 10 10
3 5 - 200 5 5
4 5 - 100 10 10
5 20 - 50 10 10
6 5 - 50 10 10
7 5 - 20 10 10
Recommended requirements Size grade Piece dimensions, mm Max fraction of product’s total mass, % oversize undersize total less than 3,15 мм 1 100 - 315 10
Any piece should not exceed more than1.15 times the maximum limit of the given size range in two or three directions. 20 5 2 25 - 200 15 7 3 10 - 100 15 7 4 3,15 - 150 7 5 3,15 - 50 7 6 3,15 - 25 7 7 до 3,15 -

Surface and rupture should not contain strongly pronounced impurities of slag, sand and other foreign matters. Oxide film and traces of antiburning-on materials are allowed.

AddThis Social Bookmark Button