420SS (Stainless Steel Balls)

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 writing instruments and lighters.

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420 Stainless Steel Balls:   Available Grades and Sizes

Grade

Size Range in Inches and Millimeters

Pen

1/64 - 1/16                        . 3mm - 1.580mm

24 - 1000

.01968 - 2                           5mm - 50.800mm

Balls per Pound

Size

Balls per Pound

Inches

Millimeters

3/32

2.381

8,000

1/8

3.175

3,420

5/32

3.968

1,750

3/16

4.762

1,010

7/32

5.556

638

1/4

6.350

427

9/32

7.143

300

5/16

7.9.7

219

11/32

8.731

164

3/8

9.525

127

13/32

10.318

99.6

7/16

11.112

79.7

15/32

11.906

64.8

1/2

12.700

53.4

17/32

13.493

44.5

9/16

14.287

37.5

19/32

15.081

31.9

5/8

15.875

27.4

21/32

16.668

23.6

11/16

17.462

20.6

23/32

18.256

18.0

3/4

19.050

15.8

25/32

19.843

14.0

13/16

20.637

12.5

27/32

21.431

11.1

Balls per Pound

Size

Balls per Pound

Inches

Millimeters

7/8

22.225

9.97

29/32

23.018

8.97

15/16

23.812

8.10

31/32

24.606

7.35

1

25.400

6.68

1 1/8

28.575

4.69

1 1/4

31.750

3.42

1 3/8

34.925

2.57

1 1/2

38.100

1.98

1 5/8

41.275

1.56

1 3/4

44.450

1.26

1 7/8

47.625

1.02

2

50.800

.844

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..

Material

AISI

Federal

Military

ASTM

UNS

AMS

Type 420

420

QQ-S-763

MS 19060

A-756

S-42000

5630

Chemical Analysis

Carbon................................................................

0.30% maximum

Chromium...........................................................

12.0% to 14.0%

Manganese.........................................................

1.0% maximum

Silicon..................................................................

1.0% maximum

Nickel

10.0% to 14.0%

Phosphorus.........................................................

0.04% maximum

Sulphur................................................................

0.03% maximum

Mechanical Properties
Hardness as measured on parallel flat surfaces is Rockwell “C” 52.

Tensile Strength..................................................

95,000 to 250,000 psi

Yield Strength

50,000 to 215,000 psi

Elongation in two inches....................................

8.0% to 25.0%

Reduction in area................................................

25.0% to 55.0%

Modulus of elasticity...........................................

29,000,000 psi

Density.................................................................

0.279 lbs./cu. in