AISI 440C Steel Balls

Martensitic hardened stainless steel balls offers an advantage in terms of maximum integral hardness, together with a remarkable corrosion resistance to water, steam, oil, petrol and alcohol. Hardness features, high degree of surface finish and very precise size tolerances make this type of stainless steel perfect for the usage in stainless steel high precision ball bearings, oil refinery valves, ball point pens and other stiff environmental applications.

International Equivalent Standard AISI 440-C - W1.4125 - AFN Z100CD17 - DIN X 105CrMo17 - JIS SUS440C

Specification

Size Range Standard Grades Application
1MM-76.20MM G10-G1000 Precision bearings, anti-friction bearings, special valves, conveyor belts and rollers, ballpoint pens. Also used in foodstuff, medical instruments, quick couplings, knotting devices, oil refinery devices, locking mechanisms, fasteners and quick-disconnect couplings

Chemical Composition %

TYPE OF MATERIAL C Si Mn P S Cr Mo
AISI 440-C 0.95-1.20 1.00 1.00 0.04 0.03 16.00-18.00 0.40-0.80

Mechanical And Physical Properties

SPECIFIC WEIGHT 7.70 gf/mm3
TENSILE STRENGTH 200 kgf/mm2
YEILD STRENGTH 193.2 kgf/mm2
MODULUS OF ELASTICITY 20.397 kgf/mm2
MAXIMUM WORKING TEMPERATURE 400 ° C
HARDNESS 57 – 65 HRC
MAGNETISM YES
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