Tungsten is one of the important alloy elements which are used to make special steel. While tungsten reduce a little elongation rate of steel, Ferro-tungsten raises strength limit and yield point and also raises hardness and abrasion resistance of steel. Ferro-tungsten is very important that tungsten has good influence on high temperature mechanical properties of steel to improve heat resistance and tempering stability of steel Chemical Compositions(GB/T3648-1996)
Brand
Chemical Compositions (%)
W
C
P
S
Si
Mn
Cu
As
Bi
Pb
Sb
Sn
≤
FeW80-A
75.0-85.0
0.10
0.03
0.06
0.5
0.25
0.10
0.06
0.05
0.05
0.05
0.06
FeW80-B
75.0-85.0
0.30
0.04
0.07
0.7
0.35
0.12
0.08
–
–
0.05
0.08
FeW80-C
75.0-85.0
0.40
0.05
0.08
0.7
0.50
0.15
0.10
–
–
0.05
0.08
FeW70
≥70.0
0.80
0.06
0.1
1.0
0.60
0.18
0.10
–
–
0.05
0.10
Notes: Ferrotungsten should be delivered in lump whose size range is from 10 to 130mm. the amount of debris whose size is less than 10mm×10mm should not exceed 5% of the total mass of this batch of products.
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