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Stainless Steel Balls  


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.

Type

Feature

Chemical Composition

Hardness 
Quenched & Tempered

Tensile Strength 
kgf/mm2

Specific Weight
gf/cm3

AISI

Cu

Ni

Cr

Mo

Mn

410

13 Cr - Low C

Corrosion and heat resistant, General Use

0.15

-

12.5

-

-

HB380 - 400

55

7.75

416

13 Cr - S

Corrosion and heat resistant, General Use

0.15

-

13.0

-

<1.25

55

420

13 Cr - Medium C

High Hardness, Corrosion and heat resistant

0.21

-

13.0

-

-

HB500 - 550

65

420 F

13 Cr - High C

 High Hardness, Corrosion and heat resistant

0.33

-

13.0

-

-

75

430 F

18 Cr - High S

 

0.12

-

17.0

-

-

-

46

440 B

18 Cr - Mo - 0.8 C

For Ball Bearing

0.85

-

17.0

-

-

HRC 55 - 62

75

440 C

18 Cr - Mo - 1.0 C

 For Ball Bearing

1.10

-

17.0

-

-

HRC 58 - 65

75

 

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.

Type

Feature

Chemical Composition

Hardness 
HRC

Tensile Strength 
kgf/mm2

Specific Weight
gf/cm3

AISI

C

Ni

Cr

Mo

Ti

302

18 Cr - 8 Ni - High C

General Use

0.15

9.0

18.0

-

-

25-39

53

7.93

304

18 Cr - 8 Ni

General Use

0.08

9.5

19.0

-

-

53

316

18 Cr - 12 Ni - 2.5 Mo

High Corrosion and
Creep Resistance

0.08

12.0

17.0

2.5

-

53

7.98

316 L

18 Cr - 12 Ni - 2.5 Mo
Trace C

-

0.03

14.0

17.0

2.5

-

49

321

18 Cr - 8 Ni - Ti

Corrosion resistant at
High
Temperature

0.08

11.0

18.5

-

5 x C%

53
7.93
 
Size and Precision
Class

Type

Size

ABMA Grade

Martensitic
Stainless Steel Balls

410, 416

1/8" - 1/2"

Grade 10,16, 24, 48, 100, 200

420J1, 420J2

5/8" - 2"

Grade 16, 24, 48, 100, 200

 

 

Duplicated Tolerance Allowed in DIN

 

440B, 440C

Refer to Size and Precision for AISI 52100

Austenitic
Stainless Steel Balls

302, 304

2.00 mm - 2"

Grade 100, 200, 500

316, 316 L

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.

 
 


Stainless Steel Balls  |  Non-Ferrous Brass Balls  |  Bearing Balls  |  Bicycle Balls  |  Grinding Media  |  Burnishing Media
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