Master Alloys

Used instead of ferrosilicozirconium which allows to increase the use of zirconium due to the lower melting point and higher dissolution speed than those of ferrosilicozirconium

Grade  Chemical composition, %
Zr Al Si P C S Ni
min. max.
18 18 18 3,5 0,08 0,08 0,008 0,4
15 15 18 3,0 0,15 0,2 0,01 0,4
Grade Chemical composition, %
Сr Al Fe Si С S Zn
min. in limits max.
70А 70 15-30 1 1 0,1 0,05 0,05
60А 60 May-40 1,5 1 0,1 0,05 -

Supplied in lumps of 0-100 mm, packed in steel drums
Density 5,5 - 6,0 g/cm3
Melting point 1170-1900 °С

Grade Chemical composition, %
Сr Fe Ni Si Al S P С
in limits max. max max max max
> 35-46 > 35-45 >9-15 10 2 0,02 0,05 0,5

Agreement between manufacturer and client, master alloy can be made with contents 
Aluminum less 1% Supplied in lumps of 10-100 mm, packed in steel drums
Density 8,0-8,5 g/cm3
Melting point 1300-1400 °С

Grade, Form and structure Chemical composition, mass % 
standard Cr Cu O max N max S max
ERCr25Cu75-PM Single-layer chromium-copper disks 24-27 Base 0,07 0,005 ND
ERCr50Cu50-PM Single-layer chromium-copper disks Balance 48-53 0,07 0,005 ND
ERCr35Cu65-PM Single-layer chromium-copper disks 33-37 Base 0,07 0,005 ND
ERCr30Cu70-PM  Two-layer disks: Cr-Cu and Cu Contact layer  27-33  Balance 0,05 0,005 0,007
Copper layer <1,0 Base 0,02 0,005 0,007
ERCr50Cu50-PM Contact layer 48-53 Balance 0,05 0,005 0,007
Copper layer <1,0 Base 0,02 0,005 0,007
PM – Powder Metallurgy
Grade Nominal dimensions, mm Thickness Contact layer Copper layer
Diameter  Disc
ERCr25Cu75-PM single-layer discs 90 8.0 to 20.0 -
ERCr50Cu50-PM single-layer discs 48, 56, 66, 70, 80 8.0 to 20.0 -
ERCr35Cu65-PM single-layer discs 42,0 to 90,0 7.0 to 13.0 -
ERCr30Cu70-PM two-layer discs 32 4,0 2±0,5 2±0,5
48, 56, 60, 66, 80 6,0 3±0,5 3±0,5
ERCr50Cu50-PM two-layer discs 32 4,0 2±0,5 2±0,5
48, 56, 60, 66, 80 6,0 3±0,5 3±0,5

The addition of niobium to stainless and high-temperature steels improves their ductility and corrosion resistance, increases strength and improves steel weldability

Grade Chemical composition, %
Nb Ni Al Si Fe C
in limits max.
б1 30-45 40-60 3,0 1,0 1,2 0,1
б2 30-48 40-60 7,0 1,0 1,2 0,1

By agreement between the manufacturer and the customer, master alloys of both grades with niobium contents of up to 48% can be supplied Supplied in lumps of up to 10-100mm, packed in steel drums.

Grade Chemical composition, %
Ва Si Fe
min. max.
45 45 0,9 0,7
40 40 1,0 0,8

Supplied in lumps of up to 10 kg
Density -3,7 g/cm3
Melting point 700-800 °С

Grade Chemical composition, %
V Si Ti Cr Mn Al P Fe
in limits max. max max max max in limits
12С12 >10-15   >5-20 5 3 10 8 0,5 > 40-85
17С12 >15-20 >  5-20 5 3 10 8 0,5 > 35-80
20С20 >20 > 15-30 5 3 5 8 0,5 >10-65

Supplied in lumps of up to 100 mm.
Density 4.5 g/cm3.
Melting point 1400-1450°C