Chrome 52100 CR100 Balls
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.
AISI Type 52100 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.
Click Here for Ball Terms and Definitions (Grades Available and Tolerances)
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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
|
6440E
G-52986
|
-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
|
0.008% maximum
|
|
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.
|
|
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
|
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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