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International Standards:

ABMA / ISO 3290 : 2001 (E) (Values in Micron)
Grade Variation of Ball
Diameter
VDWS max
Deviation from
Sperical Form
tDW max
Surface
Roughness
Ra max
Lot dia.
Variation
VDWL max
G3 0.08 0.08 0.010 0.13
G5 0.13 0.13 0.014 0.25
G10 0.25 0.25 0.020 0.5
G16 0.4 0.4 0.025 0.8
G20 0.5 0.5 0.032 1
G24 0.6 0.6 0.040 1.2
G28 0.7 0.7 0.050 1.4
G40 1 1 0.060 2
G60 1.5 1.5 0.080 3
G100 2.5 2.5 0.100 5
G200 5 5 0.150 10
G500* 12.5 12.5 - 25
G1000* 25 25 - 50

* According to ABMA Standard

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Corrosion Resistance /chart:

 METALLIC MATERIAL WATER FOOD LIQUOR DILUTE ACIDS
5.15 < 48.9°C
ACIDS > 50%  
AISI E 52100 C B B B C
AISI 302/304 B A A A A A B B A D B B B B B B A A
AISI 316 B A A A A A A A B D B A B A A A A B
AISI 420 B D A A C C B C B C
AISI 420C B D A A C C B C B C
AISI 440C B C B B B B C D C B
AISI 1085 C § D D B C
BRASS C C B C C D D D C D D C C
MONEL C A A A B D C C A A D B C A A

Symbols indicating order of preference:
A = Excellent / B = Good / C = Fair / D = Poor / • = Not Suitable
* = Satisfactory only over 75% concentration

 
   
 
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