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High-Precision Products: Balls per Pound
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Material
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Size Range
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Grade
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Chrome
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.03937 - 1
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3 - 5
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Chrome VM
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.03937 - 1
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3 - 10
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Additional Services: DFAR, Stabillization, Vaccum Melt, Air Melt, Passivation
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Standard Products: Balls per Pound
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Material
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Size Range
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Grade
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Chrome
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3/16 - 1
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10 - 48
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Chrome
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1 - 2 3/4
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24 - 48
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Chrome
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1/8 - 5
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100 - 1000
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Chrome
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1/16 - 6
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5 - 1000 (Special Sizes)
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Chrome 52100 Balls (Cr100) Download Product Sheet
Chrome steel balls are widely used in precision ball bearings, as well as, in a number of other industrial applications. Chrome steel balls have excellent surface quality, high hardness and high load bearing capacity, as a result of through hardening.
Only the finest quality chrome steel, produced in accordance with ASTM specification A-295, is used. Small size balls are made from wire stock while larger size balls are hot forged from bar stock. Modern furnaces with precisely controlled atmospheres and temperatures are used for heat treating to assure uniform hardness and proper microstructure for each chrome steel ball. Throughout the manufacturing process, statistical process control assures tolerance accuracy, fine surface finish and consistent high quality..
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Material Analysis:
Chrome balls are made from the following special chemical analysis.
All sizes and grades are manufactured from AISI Type 52100 steel.
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Material
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CDA
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Federal
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Military
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ASTM
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UNS
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AMS
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Chrome Steel
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52100
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QQ-S-624b
FED STD66b
E 52100
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MIL-S 980A(-1)
MIL-B 1083C
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A295-46T
TYPE A
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6440E
G-52986
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-MS 19059
7440(52100)
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Chemical Analysis:
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Carbon.............................
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0.98% to 1.05%
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Chromium.........................
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1.30% to 1.60%
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Manganese.......................
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0.25% to 0.45%
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Silicon..............................
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0.15% to 0.35%
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Sulphur............................
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0.008% maximum
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Phosphorus......................
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0.020% maximum
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Mechanical Properties
Chrome steel balls are uniformly hardened and tempered throughout their entire diameter to achieve maximum strength and quality. Ball hardness is controlled within the 60-67 HRC range as measured on parallel flat surfaces. Custom heat treating is available for special hardness and dimensional stability requirements.
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Tensile Strength...............................
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325,000 psi
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Yield Strength..................................
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295,000 psi
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Elongation in two inches...................
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5%
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Reduction in area.............................
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8%
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Modulus of elasticity........................
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29,500,000 psi
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Density...........................................
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0.283 lbs./cu. in.
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Consumable electrode vacuum melted (CEVM) available upon request.
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