Gcr15 bearing steel, (AISI E52100 chrome steel) balls are hardened and tempered through their entire diameter to insure uniform structure and hardness. Ball hardness is controlled within a range of HRC 60 - 67 as measured on a parallel surface.
CHEMICAL ANALYSIS
MECHANICAL PROPERTIES
Carbon
0.98 to 1.10%
Tensile Strength
325,000 psi
Chromium
1.30 to 1.60%
Yield Strength
295,000 psi
Manganese
0.25 to 0.45%
Elongation in two inches
5%
Silicon
0.15 to 35%
Reduction in area
8%
Phosphorus
0.025% Max
Modulus of elasticity
29,500,000 psi
Sulfur
0.025% Max
Density
.283 lbs./cu. In.
Nickel
0.25% Max
Molybdenum
0.10% Max
Carbon Steel
Item
C%
Si%
Mn%
P%
S%
Hardness
AISI 1010
0.08~0.13
0.30Max
0.50Max
0.07Max
0.06Max
HRC 58-64
AISI 1015
0.13~0.18
0.10~0.30
0.30~0.60
0.04Max
********
AISI 1045
0.43~0.50
0.10~0.30
0.60~0.90
0.04Max
0.05Max
AISI 1085
0.83~0.88
0.10~0.30
0.30~0.70
0.04Max
0.04Max
Stainless steels offer excellent corrosion resistance in organic, acid, industrial and marine environments. The non magnetic properties combined with exceptionally high toughness at all temperatures make these steels an excellent selection with many applications. AISI 316 stainless steel offers superior corrosion resistance due to the higher nickel and molybdenum content.
Chemical Composition
302
304
316
Carbon
0.15% max.
0.08% max.
0.08% max.
Chromium
17.00 to 19.00%
18.00 to 20.00%
16.00 to 18.00%
Manganese
2.0% max.
2.0% max.
2.0% max.
Silicon
1.0% max.
1.0% max.
1.0% max.
Nickel
8.00 to 10.00%
8.00 to 10.50%
10.00 to 14.00%
Molybdenum
-
-
2.00 to 3.00%
Mechanical Properties
302
304
316
Tensile strength
90,000 - 185,000 psi
84,000 - 185,00 psi
84,000 - 185,000 psi
Yield Strength
40,000 - 140,000 psi
42,000 - 140,000 psi
42,000 - 140,000 psi
Elongation in two inches (Annealed)
50%
55%
50%
Modulus of elasticity
28,000,000 psi
28,000,000 psi
28,000,000 psi
Annealed hardness (Rockwell B)
75 - 90
75 - 90
75 - 90
Cold worked hardness (Rockwell C)
25 - 39
25 - 39
25 - 39
Density
.286 lbs./cu.in.
.286 lbs./cu.in.
.288 lbs./cu.in.
440-C Stainless Steel (Martensitic) Balls AISI
440-C stainless steel balls exhibit excellent toughness and hardness properties and offer good corrosion resistance. This material is used extensively in bearing applications where precise tolerances and surface finishes are required.
Chemical Composition
Carbon
.95 to 1.20%
Chromium
16.00 to 18.00%
Manganese
1.0% max.
Silicon
1.0% max.
Molybdenum
.75% max.
Phosphorus
.04% max.
Sulphur
.03% max.
Mechanical Properties 440-C balls are uniformly heat treated in conformance to MIL-H-6875. The balls are hardened and tempered to a Rockwell "C" hardness of 58 to 65.
