Glass Beads

[vc_row][vc_column][vc_column_text]For cleaning, peening, finishing, polishing for use on ferrous and non-ferrous metals and alloys hard or soft, plastics, ceramics and the new advanced composite. Glass beads are manufactured from high grade crown glass of soda-lime type containing no less than 62% silica. This means NO FREE SILICA; therefore no silicosis NO HEALTH HAZARD!

GLASS BLASTING BEADS

GENERAL SPECIFICATIONS

Size Range In conformance with ASTM D-1212-58 and MIL-G-9954A (1 Nov. 1996) (min. 80% by weight in range on smaller US Sieve ; max 10% by weight on larger US Sieve).
Specific Gravity 2.45 to 2.55
Hardness Rockwell 48-50 c. DPH 50 g load-540 kg/m2
Roundness In conformance with ASTM 1155-53 and MIL-G-9954A (min, as designated for each size range specified).
Air Inclusions Less than 10% of glass beads show air inclusions exceeding more than 25% of their area (tested microscopically while submerged in liquid of 1.5refractived index).
Broken of Angular Fragments In conformance with MIL-G-9954A (3.0% max. by count).
Color No surface film, crystal of clear.
Iron Content By weight: 0.1% max.
Silica Content In conformance with ASTM C-169-57T (min. 62% for chemical stability).

GRADATIONS (MIL-G-9954A)

MIL SIZE

SCREEN SIZE

MICROMETER m SIZE

TYLER MESH (STD. DIA)

3

20-30

850-600

0.0328-0.0232

4

30-40

600-425

0.0232-0.0164

5

40-50

425-300

0.0164-0.0116

6

50-70

300-212

0.0116-0.0082

7

60-80

250-180

0.0097-0.069

8

70-100

212-150

0.0082-0.0058

9

80-120

180-125

0.0069-0.0049

10

100-170

150-90

0.0058-0.0035

11

120-200

125-75

0.0049-0.0029

12

140-230

106-63

0.0041-0.0024

13

170-325

90-45

0.0035-0.0017

CHEMICAL ANALYSIS

SiO 65.05%
Na2O 25.42%
CaO 8.02%
K2O 1.21%
Fe2O3 0.15%
Al2O3 0.075%

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