440C High Precision Solid Ball

440C stainless steel balls has strong material strength. They have been widely used in transfer unit applications requiring good toughness, hardess and dimensional stability. HRGQ offers 1″and 1/8″ 440C stainless steel balls that maily used in areospace industry. With precisely controlled Nadcap certified heat treating, lapping and passivaion, HRGQ’s 440C balls are with maximum corrosion resistance. 440C balls are also suitble for other applications such as bearings, valves, locking mechanism, etc.. Other sizes are also avaiable from HRGQ.

Material Analysis
Type 440C
Carbon0.95% to 1.20%
ManganeseMaximum of 1.00%
SiliconMaximum of 1.00%
PhosphorusMaximum of 0.04%
SulphurMaximum of 0.03%
Chromium16.00% to 18.00%
Molybdenum0.40% to 0.65%
NickelMaximum of 0.75%
CopperMaximum of 0.50%
* Per AMS 5630L
Mechanical Properties
Modulus of Elasticity29000 Kpsi
Elongation In Two Inches2%
Reduction In Area55%-70%
Ultimate Tensile Strength285 Kpsi
Physical Characteristics
HardnessMinimum HRC 58
Density0.277 lbs./in3(7.67g/cm3)
Corrosion ResistanceFair
Other size and grade are also avaiable from HRGQ
Nominal Diameter1-inch(25.40mm)1/8-inch(3.175mm)
HardnessHRC 58-65HRC 58-65