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Stainless Steel Balls
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Stainless Steel Balls 440C
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AISI 440C, W 1.4125, X105CrMo17

Diameter range:

0,5 mm – 150 mm


ISO 3290 G 10-G500

Hardened Stainless Steel

AISI Type 440C 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 in petroleum refineries and other severe environmental applications.

Consumable electrode vacuum melted (CEVM) and vacuum induction melted/vacuum arc remelted (VIM-VAR) material is available upon request. All sizes and grades of corrosion-resisting hardened stainless steel balls are passivated.

Chemical Analysis AISI 440C

C=0.86-1.21%, Cr=16-18%, Mn=max 1.0%, Si=max 1.0%, S=max 0.025%, P=max 0.025%, Mo=0.40-0.65%, Ni=max 0,75%, Cu=max 0,5%

Mechanical Properties AISI 440C

Ball hardness is controlled with an eight point range of 60-66 Rockwell "C" as measured on parallel flat surfaces. Also, Type 440C stainless steel balls are magnetic. Custom heat treating is available for special hardness requirements.

Tensile strength:

200 kgs/mm2

Yield strength:

193.2 kgs/mm2

Modulus of elasticity:

20.392 kgs/mm2


HRC 60 – 66


7.750 g/cm³



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