Chrome Steel

Balls: Chrome Steel Chinese Standard (GCR15) &  AISI/SAE/ASTM (52100)

Material

Size Range

Grade

Chrome

1/16 - 4" (1.587mm - 101.60mm)

25-1000


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.

Our Precision and Semi-Precision division offers domestically produced chrome steel balls produced in accordance with ASTM specification A-295; in addition to, Chinese standard GCR15 produced parts.   Governmental and enviromental specifications may determine the required material source.  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.  Material heat reports are provide with all shipments.

 

Material Analysis:
All sizes and grades are of the highest quality and in accordance with type AISI/SAE/ASTM 52100 and/or ISO3290 GCR15.

Material

CDA

Federal

Military

ASTM

UNS

AMS

Chrome Steel

52100

QQ-S-624b
FED STD66b
E 52100

MIL-S 980A(-1)
MIL-B 1083C

A295-09
 

6440E
G-52986

-MS 19059
7440(52100)

Chrome Steel

GCR15 (Chinese)

         

 

Chemical Analysis for AISI/SAE/ASTM 52100:
Carbon.............................0.98% to 1.05%
Chromium.......................1.30% to 1.60%
Manganese.....................0.25% to 0.45%
Silicon..............................0.15% to 0.35%
Sulphur............................0.008% maximum
Phosphorus....................0.020% maximum

Mechanical Properties for AISI/SAE/ASTM 52100:
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.
Tensile Strength............................325,000 psi
Yield Strength................................295,000 psi
Elongation in two inches.............5%
Reduction in area.........................8%
Modulus of elasticity....................29,500,000 psi
Density...........................................0.283 lbs./cu. in. 


Chemical Analysis for Chinese Standard ISO3290 GCR15
Carbon.............................0.95% to 1.05%
Chromium.......................1.40% to 1.65%
Manganese.....................0.25% to 0.45%
Silicon..............................0.15% to 0.35%
Sulphur............................0.025% maximum
Phosphorus....................0.025% maximum 

All international specifications are for geometry only and not for mechanical properties.  
For material certification & mechanical properties please contact your local representative. 

Please note that the material information provided on our website is for informational purposes only. The properties listed per product type are typical and can vary based on suppliers of raw materials and customer specific needs. Please contact customer service for verification prior to ordering. Price and delivery may be subject to change based on specific requirements.

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