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420 Stainless Steel Balls: Available Grades and Sizes
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Grade
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Size Range in Inches
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100 - 1000
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1/8 - 2
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Stainless Steel Balls Type 420
AISI type 420 stainless steel balls afford the advantage of maximum hardness combined with corrosion-resisting properties. This hardness, together with precise geometry and fine surface finish, makes them especially useful for both bearing and valve applications, as well as writting instruments and lighters..
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Balls per Pound
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Size
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Balls per Pound
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Inches
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Millimeters
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3/32
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2.381
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8,000
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1/8
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3.175
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3,420
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5/32
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3.968
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1,750
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3/16
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4.762
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1,010
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7/32
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5.556
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638
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1/4
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6.350
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427
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9/32
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7.143
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300
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5/16
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7.9.7
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219
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11/32
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8.731
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164
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3/8
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9.525
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127
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13/32
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10.318
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99.6
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7/16
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11.112
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79.7
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15/32
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11.906
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64.8
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1/2
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12.700
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53.4
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17/32
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13.493
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44.5
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9/16
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14.287
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37.5
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19/32
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15.081
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31.9
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5/8
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15.875
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27.4
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21/32
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16.668
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23.6
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11/16
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17.462
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20.6
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23/32
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18.256
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18.0
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3/4
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19.050
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15.8
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25/32
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19.843
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14.0
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13/16
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20.637
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12.5
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27/32
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21.431
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11.1
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Balls per Pound
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Size
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Balls per Pound
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Inches
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Millimeters
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7/8
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22.225
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9.97
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29/32
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23.018
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8.97
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15/16
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23.812
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8.10
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31/32
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24.606
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7.35
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1
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25.400
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6.68
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1 1/8
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28.575
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4.69
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1 1/4
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31.750
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3.42
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1 3/8
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34.925
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2.57
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1 1/2
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38.100
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1.98
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1 5/8
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41.275
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1.56
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1 3/4
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44.450
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1.26
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1 7/8
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47.625
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1.02
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2
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50.800
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.844
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Material Analysis:
All sizes and grades are of the highest quality and in accordance with ASTM 756. Passivation to ASTM A380 is available upon request..
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Material
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AISI
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Federal
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Military
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ASTM
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UNS
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AMS
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Type 420
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420
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QQ-S-763
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MS 19060
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A-756
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S-42000
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5630
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Chemical Analysis:
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Carbon............................................
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0.30% maximum
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Chromium.......................................
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12.0% to 14.0%
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Manganese.....................................
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1.0% maximum
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Silicon............................................
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1.0% maximum
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Nickel ............................................
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0.25% to 1.0%
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Phosphorus.....................................
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0.04% maximum
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Sulphur...........................................
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0.03% maximum
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Mechanical Properties:
Hardness as measured on parallel flat surfaces is Rockwell “C” 52.
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Tensile Strength............................
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95,000 to 250,000 psi
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Yield Strength...............................
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50,000 to 215,000 psi
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Elongation in two inches................
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8.0% to 25.0%
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Reduction in area..........................
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25.0% to 55.0%
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Modulus of elasticity......................
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29,000,000 psi
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Density.........................................
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0.279 lbs./cu. in
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