ISO 9001:2015
SCC*
SoKa Bau

Ferromolybdenum GOST 4759-91, MARK FMO58, FMO60

Ferromolybdenum – an alloy containing 50-70% molybdenum, is used in the production of stainless heat-resistant, super-strong alloys of non-ferrous metals, special types of steels, and is also used in steel production. The addition of molybdenum in the form of ferromolybdenum to steel significantly improves the properties of steel: the homogeneity of the fine-crystalline structure, resistance to overheating, expands the temperature range of quenching and tempering, increases the hardenability and improves the mechanical properties. One of the most valuable properties of molybdenum is its ability to eliminate the temper brittleness of chromium-nickel steel.

CHEMICAL COMPOSITION

Mass fraction,%            
molybdenum, not lessWSiCPSCuAsSnSbPbZnBi
no more
FMo60 (nk)600,30,50,050,050,10,50,020,010,010,010,01
FMo60600,30,80,050,050,10,50,020,010,010,010,01
FMo58 (hk)580,50,50,080,050,10,80,030,020,020,010,01
FMo58580,510,080,050,120,80,030,020,020,010,01
FMo55550,81,50,10,10,151-0,050,05--
FMo5050-30,50,10,52-0,10,1--

FRACTIONAL COMPOSITION

Ferromolybdenum is supplied in chunks or as crushed and sieved particles. Particle size ranges and tolerances should be in accordance with the table.

ClassParticle size range, mmUndersize product, max.,% By weightOversize product, max.,% By weight
12 - 100310
22 - 503No piece should be more than 1.5 times the limit of the specified size range in two to three dimensions
32 - 255No piece should be more than 1.5 times the limit of the specified size range in two to three dimensions
4not more 2-