STANDARD GRADING (SIZES) FOR NATURAL SHEET MICA OR BLOCKS

ASTM Grade Size
Area of minimum Rectangle
Minimum dimension of one side
OOEE SPECIAL
OOEE SPECIAL
EE SPECIAL
E SPECIAL
A-1 (SPECIAL)
NO. 1
NO. 2
NO. 3
NO. 4
NO. 5
NO. 5 1/2
NO. 6
Sq.In Equivalent Sq Cm
100 650
80 520
60 390
48 310
36 235
24 155
15 97
10 65
6 40
3 20
2 1/2 15
1 6.5
Inch Cm
4 10.0
4 10.0
4 10.0
4 10.0
3 1/2 8.8
3 8.8
2 5.0
2 5.0
1 1/2 3.8
1 2.5
7/8 2.2
3/4 1.9

 

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3C, Camac Street, P.O.Box 9052,
Calcutta 700 016 INDIA
Tel: +91-33-2229-2277/2229-4505
Fax:+91-33-2229-5216/2474-7959

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