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When
maintaining the integrity of the ball finish in a corrosive
environment is important, choose from our quality stainless
steel balls, which are being manufactured for such applications
as bearings, bicycle parts, casters and wheels, etc. Stainless
Steel balls that we are manufacturing are in general classified
into two representative groups viz., high chrome (martensitic)
and high chrome-nickel (austenitic) stainless steels.
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Martensitic
Stainless Steel Balls
The stainless steels (>12% Cr) of this type are provided
with the martensite structure when quenched and their
corrosion resistance is rather inferior, but better mechanical
properties, as compared with the austenitic stainless
steels. This feature makes them especially useful for
ball bearings and valve applications.
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Type
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Feature |
Chemical Composition
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Hardness
Quenched & Tempered
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Tensile Strength
kgf/mm2
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Specific Weight
gf/cm3
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AISI
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Cu
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Ni
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Cr
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Mo
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Mn
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410
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13 Cr - Low C
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Corrosion and heat resistant,
General Use
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0.15
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-
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12.5
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-
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-
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HB380 - 400
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55
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7.75
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416
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13 Cr - S
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Corrosion
and heat resistant, General Use
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0.15
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-
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13.0
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-
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<1.25
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55
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420
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13 Cr - Medium C
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High Hardness, Corrosion
and heat resistant
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0.21
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-
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13.0
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-
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-
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HB500 - 550
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65
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420 F
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13 Cr - High C
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High Hardness,
Corrosion and heat resistant
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0.33
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-
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13.0
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-
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-
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75
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430 F
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18 Cr - High S
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0.12
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-
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17.0
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-
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-
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-
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46
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440 B
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18 Cr - Mo - 0.8 C
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For Ball Bearing
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0.85
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-
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17.0
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-
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-
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HRC 55 - 62
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75
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440 C
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18 Cr - Mo - 1.0 C
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For Ball Bearing
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1.10
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-
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17.0
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-
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-
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HRC 58 - 65
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75
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Austenitic
Stainless Steel Balls
The non-magnetic high chrome-nickel stainless steels with
the austenite structure are showing no quench hardenability,
however, featured with high toughness, good corrosion
resistance and remarkable mechanical properties at high
and low temperature. The balls made of them are widely
used for valves and the related equipments.
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Type
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Feature |
Chemical Composition
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Hardness
HRC
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Tensile Strength
kgf/mm2
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Specific Weight
gf/cm3
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AISI
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C
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Ni
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Cr
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Mo
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Ti
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302
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18 Cr - 8 Ni - High C
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General Use
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0.15
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9.0
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18.0
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-
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-
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25-39
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53
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7.93
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304
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18 Cr - 8 Ni
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General Use
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0.08
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9.5
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19.0
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-
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-
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53
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316
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18 Cr - 12 Ni - 2.5 Mo
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High Corrosion and
Creep Resistance
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0.08
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12.0
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17.0
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2.5
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-
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53
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7.98
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316 L
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18 Cr - 12 Ni - 2.5 Mo
Trace C
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-
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0.03
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14.0
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17.0
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2.5
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-
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49
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321
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18 Cr - 8 Ni - Ti
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Corrosion resistant at
High Temperature
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0.08
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11.0
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18.5
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-
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5 x C%
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53
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7.93
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| Size
and Precision |
| Class |
Type
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Size
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ABMA
Grade
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Martensitic
Stainless Steel Balls
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410,
416
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1/8"
- 1/2"
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Grade
10,16, 24, 48, 100, 200
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420J1,
420J2
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5/8"
- 2"
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Grade
16, 24, 48, 100, 200
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Duplicated
Tolerance Allowed in DIN
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440B,
440C
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Refer
to Size and Precision for AISI 52100
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Austenitic
Stainless Steel Balls
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302,
304
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2.00
mm - 2"
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Grade
100, 200, 500
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316,
316 L
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321,
430 F
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440C
Stainless Steel Balls for Miniature Bearings
The technical innovations in a variety of industrial fields
such as computers, instruments, watches, etc. have initiated
the rapid growth of miniature bearings. The 440C stainless
steel balls are used instead of high carbon chrome alloy
steel balls for miniature bearings, for which the corrosion
resistance is required. Our intensified research works
including the unique passivation process are guaranteeing
high precision, long durability and good surface quality
of our stainless steel balls for miniature bearings.
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