Ferrous Metal Steel Balls

Balls of this type are generally used in applications where there are only moderate loads and slow rotating parts.

Dimensional Conversion Chart

Precision Ball: Ferrous Metals

Low Carbon Steel (Case Hardened)

General Information:

Balls of this type are generally used in applications where there are only moderate loads and slow rotating parts. For Example: Castors, Conveyors and Non-precision Bearings. The main feature of this type of ball is the carburized case with a soft core giving resistance to surface wear.

International Equivalents:
AISI 1010, JIS SWRM12, EN32, ASTMA/29, Wks 1.0010 Minimum Case Depth:

High Carbon Steel (Through Hardened)

General Information

Balls of this material have the advantages of being through hardened to HRc 60 min and will take higher loads and provide longer life than case hardened carbon balls for such applications as the Cycle Industry.

International Equivalents:
AISI 1065-86, EN8-9 C85, Wks 1.1269 Crushing Loads

High Carbon Chrome Alloy

General Information

This is an oil hardened steel which is universally used by the ball and roller bearing industry. The steel has high hardness and good resistance to deformation and excellent wear , resistance. Usually vacuum degassed and uniformly through hardened in atmospherically controlled electric furnaces.

International Equivalents:
AISI 52100, SUJ2ASTM 100CR6 , W 1.3505 Crushing Loads for Chrome Steel

Stainless Steel AISI 440C (Martensitic)

General Information

These balls give maximum hardness with good corrosion resistance to fresh water, steam, crude oil, gasoline, alcohol, food environment, blood and perspiration. In addition this material is ferro-magnetic and makes a fair permanent magnet. Balls are deep freeze stabilised after heat treatment.

International Equivalents
AISI 440C, DINX105 CR Mol7, SUS 440C, W 1.4125

Composition
C	0.95 – 1.20%
Cr	16 -18%
Si	1.00% Max
Mn	1.0% Max
P	0.040% Max
S	0.030% Max
Mo	0.40 – 0.80% Max
Hardness
HRc	58 - 63
Mechanical Properties
Tensile Strength	285,000 psi
Yield Strength	275,000 psi
Density	0.277 Ibs/cu.in
Size Range:	0.635mm (0.025") to 101.60mm (4")
Standard Grades Available	10, 25, 50,1000

Stainless Steel AISI 302.304.304L (Austenitic)

General Information

AISI 302 and 304 balls are for applications where material toughness and resistance to corrosion are more important than hardness. They have good corrosion resistance to the food environment, oxidising solutions and most organic chemicals. Applications are Valves, Aerosol and Finger Pumps. Corrosion resistance is higher after annealing and passivation. Not resistant to sulphuric acids.

International Equivalents
DIN X5 CR Ni 18.09, JIS SUS 304, W 1.4301

Composition	302	304	304L
C	0.12% Max	0.08% Max	0.03% Max
Cr	17 -19%	18 – 20%	18 – 20%
Ni	8 -11%	8 -10.5%	8 -10.5%
Si	1.0% Max	1.0% Max	1.0% Max
Mo	1.0% Max	-	-
Mn	2.0% Max	2.0% Max	2.0% Max
P	0.045% Max	0.045% Max	0.045% Max
S	0.03% Max	0.03% Max	0.03% Max

Hardness
HRc	Soft (Annealed)
Mechanical Properties
Tensile Strength	100,000 to 180,000 psi
Yield Strength	50,000 to 150,000 psi
Density	0.286 Ibs/cu.in
Size Range:	1.588mm (1/16") to 76.2mm (3")
Standard Grades Available	24, 48,100, 200,1000

Stainless Steel AISI 420,420C (Martensitic)

General Information

Balls of this material have a lower chrome content than 440C, and are used in applications where the more rigid corrosion resistance requirements can be relaxed. They have fair resistance to fresh water, steam, oil, gasoline, blood, perspiration, alcohol and food environment. However will not pass 40 hours salt spray test.

International Equivalents
AISI 420, SUS 420, X47Crl3, EN56D, W 1.3541

Composition	420	420C
C	0.15% Min	0.40 – 0.50%
Cr	12 -14%	12.5 -14.5%
Si	1.0% Max	1.0% Max
Mn	1.0% Max	1.0% Max
P	0.04% Max	0.04% Max
S	0.03% Max	0.03% Max
Ni	-	1.0% Max

Hardness
HRc	48-53    53-58
Mechanical Properties
Tensile Strength	275,000 psi
Yield Strength	0.280 Ibs/cu.in
Size Range:	0.6mm (0.024") to 76.2mm (3")
Standard Grades Available	10,16, 24, 48,100, 200

Stainless Steel AISI 316, 316L (Austenitic)

General Information

Similar to AISI 302/304 but, with the addition of molybdenum improves corrosion resistance particularly to sulphuric acid compounds. These balls are used extensively in applications where contact is made with inks, photographic chemicals, bleaches, dyes and nitric acids.

This is the only austenitic steel for ball manufacture and can be Magnetic and Non Magnetic. International Equivalents
DIN X5 CR Nl M0 17122, W 1.4401, JIS SUS 316

Composition	316	316L
C	0.08% Max	0.08% Max
Cr	16 -18%	16 -18%
Ni	10 -14%	10 -14%
Si	1.0% Max	1.0% Max
Mo	2-3%	2-3%
Mn	2.0% Max	2.0% Max
P	0.045% Max	0.045% Max
S	0.03% Max	0.03% Max

Hardness
HRc	Soft (Annealed)
Mechanical Properties
Tensile Strength	180,000 psi
Yield Strength	150,000 psi
Size Range:	1.588mm (1/16") to 76.2mm (3")
Density:	0.290 Ibs/cu.in
Standard Grades Available	24, 48,100, 200,1000