• Grades
SUMIDIA WD HAS 5 GRADES: F, S, M, C, and E. • Available grades are limited by the shape and size
F
Grade
The F grade WD has a ultra fine diamond grain size. It is suitable for drawing dies that require a high quality surface finish or high fracture strength.
Strength and Wear resistance vs. Grades
2.5
2.5
S
Grade
2
2
1.5
1.5
The S grade WD has fine diamond grains. It is the standard grade of small diameter die blanks with supprt ring.
1
1
0.5
0.5
0
0
0
5 10 15 20 25 30 Grain Size （μm）
M
Grade
The M grade WD is a middle diamond grain size. It is effective for a wide variety of applications offering high finish with good wear resistance
Diamond content ratio vs. Grade
100
95
E
C
Grade
90
C
S
M
85
The C grade WD is a coarse diamond grain size. It is suitable for drawing dies that require high wear-resistance.
F
80
0
5 10 15 20 25 30
Grain Size （μm）
E
• WD800 Series
Grade
WD800 Series, binder metal removed from WD700 series, is high heat resistant material.
The E grade WD is an extra-coarse diamond grain size.
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