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Balls are made from many different varities of Stainless Steel. They are used for application where prevention of rust is desireable. They are also use for areas where non-magnatic properties are called for. They are produced using extremely sophisticated and specialized machines. |
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Starting from the rigorous testing of the wire for all necessary parameters, balls are produced in specially designed machines called Headder, Flasher, Grinder and Lapper. Heat treatment is one of the most critical operations which gives required strength & hardness. It makes the balls tough and wear resistant. Apart from intermediate vigil at all operations, for all quality parameters, finished products are also tested with extremely sophisticated equipments to ensure right quality of DSP Balls. |
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DIFFERENT GRADES FOR STAINLESS STEEL BALLS
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SPECIFICATIONS
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EQUIVALENTS
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HARDNESS
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AVAILABLE GRADES
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PROPERTIES
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AISI 420 C
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W.1. 4034 AFN. Z 40 C 13 B.S. 420 S
45 DIN X 40 Cr 13
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35 HRC
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10
&
Above
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420 C balls offer good hardness & surface finish. They are generally used for all applications requiring corrosion resistance to water. Steam water, air, gasoline. Not recommended for applications requiring resistance to most chemical solutions. |
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AISI 440 C
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W. 1.4125 AFN. Z 100 CD 17 DI.X 105
Cr. M0 17
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58
To 65 HRC
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10 &
Above
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440 C balls afford the advantage of maximum hardness combined with corrosion- resistance properties. The hardness together with accuracy and fine surface finish, makes them especially used for both bearing & valve application & other severe applications. |
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AISI 302
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W. 1.4319 AFN Z 10 CN 1809 B.S. 302
S25 DIN X 12 Cr Ni 18 .8
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25-39 HRC
OR 140-160 HB
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48
& Above
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Austenistic unhardened stainless steel balls with excellent toughness and resistance to corrosion by such agents as oxidizing solutions, most organic chemicals, food stuffs and sterilizing solutions. They have non-magnetic properties. |
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AISI 304
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W 1.4301 AFN. Z 6 CN 18.09 B.S. 304 S
15 DIN X Cr Ni 189
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25-39 HRC
OR 140-160 HB
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48
& Above
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As above but with Lower carbon content. |
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AISI 316
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W. 1.440 AFN Z 6 CN D 1711 B.S. 316 S
16 DIN X Cr Ni Mo 1810
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25-39 HRC
OR 140-160 HB
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24
& Above
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Austenitic unhardened stainless steel balls as above but with increased nickel and addition of molybdenum. This is giving much better corrosion resistance to strong acids (sulfuric, phosphoric & acetic). Can be used to elevated temperatures. |
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AISI 316-L
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W. 1.4404 AFN Z 2 CN 1712 B.S. 316
S12
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25-39 HRC
OR 140-160 HB
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48
& Above
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As above but with lower carbon content and increased nickel. |
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DIFFERENT GRADES FOR STAINLESS STEEL BALLS
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C
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Si
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Mn
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P
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S
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Cr
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Mo
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Ni
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AISI 420 C
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W.1. 4034 AFN. Z 40 C 13 B.S. 420 S 45
DIN X 40 Cr 13
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0.40
To 0.50
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1.00 max
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1.00 max
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.045 max
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.030 max
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12.0
To
14.0
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-
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-
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AISI 440 C
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W. 1.4125 AFN. Z 100 CD 17 DI.X 105 Cr.
M0 17
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0.95 To 1.20
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1.00 max
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1.00 max
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0.045 max
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0.03 max
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16.0 To 18.0
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0.4
To 0.8
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-
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AISI 302
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W. 1.4319 AFN Z 10 CN 1809 B.S. 302 S25
DIN X 12 Cr Ni 18 .8
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0.12
max |
0.2
To
1.00
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0.5 To 2.0
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0.045 max
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0.03 max
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17.0 To 19.0
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8.0 To 11.0
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-
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AISI 304
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W 1.4301 AFN. Z 6 CN 18.09 B.S. 304 S
15 DIN X Cr Ni 189
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0.07
max |
1.00 max
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2.0 max
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.045 max
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0.03
max
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17.0 To 20.0
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-
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8.50 To 10.5
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AISI 316
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W. 1.440 AFN Z 6 CN D 1711 B.S. 316 S
16 DIN X Cr Ni Mo 1810
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0.07 max
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1.00
max |
2.00 max
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0.045 max
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0.03 max
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16.5 To 18.5
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2.00 To 2.5
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10.5 To 13.5
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AISI 316-L
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W. 1.4404 AFN Z 2 CN 1712 B.S. 316 S12
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0.03
max |
0.20 To 1.00
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0.50 To 2.00
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045 max
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0.03 max
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16.5 To 18.5
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2.25To 14.0
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10.0 To
14.0
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DSP-BALLS:
PRODUCTION LINES OF PRECISION BALLS
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Production lines for Precision Balls are stream-lined with optimum combinations of various processes. The process given below illustrate how the high Quality of Stainless Steel balls are achieved |
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Raw
Material
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Is thoroughly inspected for Physical & Chemicals properties . |
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Heading
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Wire coils are cold forged into spherical blanks, for compact structure, in semi-automatic machines known as single stroke Headers. |
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Flashing
/ Filing
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Die-marks on poles and equator of headed blanks
are then removed by grinding them between hardened plates of special
composition, known as Flashing / Filing.
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Lapping
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Balls are lapped for final parameters of size,
sphericity , lot variation and to surface quality in a series of
specially designed machines known as Lappers.
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Cleaning
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Balls are then prepared for macro
inspection by thorough cleaning in a especially designed cleaning
machine.
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Macro
Inspection
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Whole production of DSP-BALLS goes through 100 %
inspection by well trained inspectors, under suitable magnification
and light, for all surface defects.
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Super
finishing
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Balls passed through macro inspection goes under
super finishing and all Specified parameters are maintained in required
tolerances as per grade to be prepared .
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Guarantee
Test
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During production balls are inspected at
every stage for fixed stage specifications, and the material is
unloaded from the machines only on qualifying limits. Finally, during
super finishing, parameters of geometry, lot variation and surface
roughness etc. are re-ensured and detailed inspection report is
prepared and supplied to the customer on demand.
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Packing
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They are then double packed
in polythene bags, before being packed in Cardboard boxes and wooden
cases. Labels carrying details of sizes, quality are properly pasted..
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Cargo
to Export
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Balls so packed are ready for Export to
customers.
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