Tabels for grain size and chemcial composition

Grain Size No. Basic Grain Size(um) Chemical Composition

C Min(%) B Min(%) Fe2O3 Max(%) Si Max(%) B4C Min(%)

B1 B2 B1 B2 B1 B2 B1 B2 B1 B2

60# 250 16 20 76 76 0.5 0.3 0.4 0.2 97 98

70# 212

80# 180

90# 150

100# 125

120# 106 16 20 76 76 0.5 0.3 0.4 0.2 95 97

150# 90-75

180#

220# 63-53

240# 63-53

W63 63-50 16 20 76 76 0.6 0.4 0.6 0.3 94 96

W50 50-40

W40 40-28

W28 28-20

W20 20-14

W14 14-10 16 19 76 76 1 0.5 1.2 0.4 92 95

W10 10-7

W7 7-5

W5 5-3.5 16 19 76 76 1 0.5 1.2 0.4 90 95

W3.5 3.5-2.5

W2.5 2.5-0

60#-150# 16 20 76 76 0.5 0.3 0.4 0.3 92 97

-10um 10um 20 76 1 0.5 0.4 96

-325mesh 45um 16 20 76 76 0.8 0.3 0.4 0.4 94 96

-100mesh 150um

-200mesh 90um

-3mm 16 20 76 76 0.5 0.3 0.4 0.2 96 98

Items Content

Total Boron 72-80%

Total Carbide 17-22%

Fe2O3 0.25-0.8

SiO2 0.2-1.2%

B4C 89-98%

Size:Granular,powder,and superfine grade