Stainless Steel Balls Chart

Material Analysis 18-8 AISI 316 AISI Carpenter 20Cb-3 440C AISI
Carbon 0.08% 0.08% 0.06% 0.95/1.20%
Manganese 2.00% max. 2.00% max. 1.00% max.
Phosphorus 0.045% max. 0.035% max. 0.04% max.
Sulfur 0.030% max. 0.035% max. 0.03% max.
Silicon 1.00% max. 1.00% max. 1.00% max.
Nickel 8.00/10.00% 10.00/14.00% 32.50/35.00%
Chromium 17.00/19.00% 16.00/18.00% 19.00/21.00% 16.00/18.00%
Molybdenum 2.00/3.00% 2.00/3.00% 0.75% max.
Copper 3.00/4.00%
Columbium + Tantalum 8xC min./1.00 max. 0.75% max.
Physical Properties
Specific Gravity 8.03 7.95 8.08 7.75
Density 0.286 lbs/in.3 0.287 lbs/in.3 0.292 lbs/in.3 0.28 lbs/in.3
Mechanical Properties
Tensile Strength 85 Kpsi 82 Kpsi 90 Kpsi 285 Kpsi
Yield Strength 35 Kpsi 36 Kpsi 46 Kpsi 275 Kpsi
Elongation (3″) 60% 69% 45% (2inches) 2%
Reduction of Area 70% 76% 65% 10%
Impact (17.0″) 110ft/lbs 240ft/lbs
Hardness 87RB 80RB 86RB 58RC (min.)

Stock Availability

    Available
Stock Sizes
Roundness
Dia. Tol/Ball
Basic Dia.
Tolerance
Surface
Finish
Material Ball Grade Inches Inches Inches Micro Inch
316 50V 1/8 – 3/4″ .000050 ±.001 5
316 100V 7/8 – 1 7/8″ .0001 ±.002 8
S.S. 440C 25 1/8 – 1.0″ .000025 ±.001 1.5
Carp 20C 50V 1/8 – 5/8″ .000050 ±.001 5
Carp 20C 100V 3/4 – 1 7/8″ .0001 ±.002 8
Types of Stainless Steel Balls Stainless Steel Balls Information Page