Ferrous Metal Steel Balls

Dimensional Conversion Chart:

Inch Fractions	Inch Decimals	Metric mm	Weight per 1000 balls kg	Inch Fractions	Inch Decimals	Metric mm	Weight per 1000 balls kg
1/64	.0156	0.397	.00026	–	.7480	19.000	27.98
–	.0197	0.500	.00051	3/4	.7500	19.050	28.20
1/32	.0312	0.794	.00210	25/32	.7812	19.844	31.87
–	.0394	1.000	.00407	–	.7874	20.000	32.63
3/64	.0469	1.190	.00688	13/16	.8125	20.637	35.85
–	.0472	1.200	.00704	–	.8268	21.000	37.77
–	.0590	1.500	.01377	27/32	.8437	21.431	40.15
1/16	.0625	1.588	.01632	–	.8661	22.000	43.43
5/64	.0781	1.984	.03187	7/8	.8750	22.225	44.78
–	.0787	2.000	.0326	–	.9055	23.000	49.63
3/32	.0937	2.381	.0550	29/32	.9062	23.019	49.75
–	.0984	2.500	.0638	15/16	.9375	23.812	55.07
7/64	.1094	2.778	.0875	–	.9449	24.000	56.39
–	.1181	3.000	.1101	31/32	.9687	24.606	60.77
1/8	.1250	3.175	.1305	–	.9842	25.000	63.73
–	.1378	3.500	.1749	1	1.0000	25.400	66.84
9/64	.1406	3.572	.1859	–	1.0236	26.000	71.69
5/32	.1562	3.969	.2550	1 1/16	1.0625	26.987	80.17
–	.1575	4.000	.2610	–	1.1024	28.000	89.54
11/64	.1719	4.366	.3394	1 1/8	1.1250	28.575	95.17
–	.1772	4.500	.3716	–	1.1811	30.000	110.10
3/16	.1875	4.762	.4406	1 3/16	1.1875	30.162	111.90
–	.1968	5.000	.5099	1 1/4	1.2500	31.750	130.50
–	.2165	5.500	.6786	–	1.2598	32.000	133.70
7/32	.2187	5.556	.6996	1 5/16	1.3125	33.337	151.10
15/64	.2344	5.953	.8605	–	1.3386	34.000	160.30
–	.2362	6.000	.8810	1 3/8	1.3750	34.925	173.80
1/4	.2500	6.350	1.044	–	1.3780	35.000	174.90
–	.2559	6.500	1.120	–	1.4173	36.000	190.30
17/64	.2656	6.747	1.253	17/16	1.4375	36.512	198.50
–	.2756	7.000	1.399	–	1.4960	38.000	223.80
9/32	.2812	7.144	1.487	1 1/2	1.5000	38.100	225.60
–	.2953	7.500	1.721	1 9/16	1.5625	39.687	255.00
19/64	.2969	7.541	1.749	–	1.5748	40.000	261.00
5/16	.3125	7.938	2.040	1 5/8	1.6250	41.275	286.00
–	.3150	8.000	2.088	1 11/16	1.6875	42.862	321.20
–	.3346	8.500	2.505	1 3/4	1.7500	44.450	358.20
11/32	.3437	8.731	2.715	–	1.7716	45.000	371.70
–	.3543	9.000	2.973	1 13/16	1.8125	46.037	398,00
23/64	.3594	9.128	3.102	1 7/8	1.8750	47.625	440.60
–	.3740	9.500	3.497	1 15/16	1.9375	49.212	486.10
3/8	.3750	9.525	3.525	–	1.9685	50.000	509.90
25/64	.3906	9.922	3.983	2	2.0000	50.800	534.70
–	.3937	10.000	4.079	21/8	2.1250	53.975	641.40
13/32	.4062	10.319	4.481	–	2.1653	55.000	678.60
–	.4331	11.000	5.429	21/4	2.2500	57.150	761.30
7/16	.4375	11.112	5.597	–	2.3622	60.000	881.00
–	.4528	11.500	6.203	23/8	2.3750	60.325	895.40
29/64	.4531	11.509	6.219	2y2	2.5000	63.500	1044.40
15/32	.4687	11.906	6.884	–	2.5590	65.000	1120.10
–	.4724	12.000	7.048	25/8	2.6250	66.675	1209.00
31/64	.4844	12.303	7.596	23/4	2.7500	69.850	1390.10
y2	.5000	12.700	8.355	–	2.7559	70.000	1484.70
–	.5118	13.000	8.961	27/8	2.8750	73.025	1588.40
17/32	.5312	13.494	10.02	–	2.9528	75.000	1720.70
–	.5512	14.000	11.19	3	3.0000	76.200	1804.70
9/16	.5625	14.288	11.90	31/8	3.1250	79.375	2039.80
–	.5905	15.000	13.77	–	3.1500	80.000	2088.30
19/32	.5937	15.081	13.99	3 ¥a	3.2500	82.550	2294.40
5/8	.6250	15.875	16.32	–	3.3464	85.000	2530.90
–	.6299	16.000	16.70	3y2	3.5000	88.900	2865.70
21/32	.6562	16.669	18.89	–	3.5433	90.000	2993.40
–	.6693	17.000	20.04	–	3.7401	95.000	3521.10
11/16	.6875	17.462	21.72	33/4	3.7500	95.250	3524.70
–	.7087	18.000	23.79	–	3.9370	100.000	4078.80
23/32	.7187	18.256	24.82	4	4.0000	101.600	4277.70

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

Composition:
C	0.10-0.15%
Mn	0.30-0.60%
P	0.045% Max.
S	0.045% Max.
Si	0.1-0.4% Max.
Hardness HRc	60 Min.
Mechanical Properties
Tensile Strength	53.000psi
Yield Strength	44.000psi
Density	0.284lbs/cu.in
Size Range:	1.588mm(1/16″)to 12.700mm(1/2″)
Standard Grades Available	100,200,500,1000

Minimum Case Depth:

Ball Dia.	Case Depth	Ball Dia.	Case Depth
1.5mm-2mm	0.4mm	9.5mm-11mm	1.4mm
2.1mm-3mm	0.5mm	11.1mm-12.5mm	1.7mm
3.1mm-4.5mm	0.6mm	12.6mm-14mm	1.8mm
4.6mm-5.5mm	0.8mm	14.1mm-19mm	1.9mm
5.6mm-6.5mm	0.9mm	19.1mm-38mm	2.0mm
6.6mm-9.5mm	1.1mm

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

Composition:(AISI1085)
C	0.85%
Si	0.35%
Mn	0.60%.
P	0.22%.
S	0.022%.
Hardness HRc	60 Min.
Mechanical Properties
Tensile Strength	106.400psi
Density	0.284lbs/cu.in
Size Range:	3.175mm(1/8″) to 38.1mm(1.1/2??)
Standard Grades Available	100, 500,1000

Crushing Loads

Ball Dia.	Load	Ball Dia.	Load
1/8″	375kgs	9/32″	2200kgs
5/32″	800kgs	5/16″	2700kgs
3/16″	1100kgs	11/32″	3200kgs
1/4″	1800kgs	3/8″	3900kgs

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

Composition:
C	0.95-1.1%
Cr	1.30-1.60%
Mn	0.25-0.45%.
Si	0.15-0.30%.
P	0.025% Max.
S	0.025% Max
Hardness HRc	60-67
Mechanical Properties
Tensile Strength	325.000psi
Yield Strength	295.000psi
Density	0.283lbs/cu.in
Size Range:	0.635mm(0.025″) to 101.60mm(4??)
Standard Grades Available	51025100500

Crushing Loads for Chrome Steel

Diameter		Minimum Crushing Load	Diameter		Minimum Crushing Load	Diameter		Minimum Crushing Load
Inch	mm	kg	Inch	mm	kg	Inch	mm	kg
1/8	3.175	666	31/64	12.303	7350	1	25.400	26600
–	3.500	792	1/2	12.700	7780	11/6	26.987	29600
5/32	3.968	990	17/32	13.494	8660	11/8	28.575	32800
–	4.000	1000	9/16	14.288	9590	1 3/16	30.162	36100
–	4.500	1240	–	15.000	10500	1 1/4	31.750	39500
3/16	4.762	1370	19/32	15.081	10600	1 5/16	33.337	43100
–	5.000	1490	5/8	15.875	11600	1 3/8	34.925	46800
7/32	5.556	1800	21/32	16.668	12600	1 7/16	36.512	50600
15/64	5.593	2020	11/16	17.462	13700	1 1/2	38.100	54600
–	6.000	2060	23/32	18.256	14800	1 5/8	41.275	62900
1/4	6.350	2080	3/4	19.050	16000	1 3/4	44.450	71700
17/64	6.746	2535	25/32	19.843	17200	1 7/8	47.625	81100
9/32	7.144	2810	–	20.000	17400	2	50.800	90900
5/16	7.938	3380	13/16	20.637	18400	2 3/16	55.562	106500
11/32	8.731	4000	27/32	21.431	19700	2 1/4	57.150	112000
3/8	9.525	4670	7/8	22.225	21000	2 5/16	58.735	116500
–	10.000	5090	29/32	23.018	22300	2 1/2	63.500	135000
13/32	10.318	5380	15/16	23.812	23700	2 3/4	69.850	159800
7/16	11.112	6140	31/32	24.606	25100	3	76.200	186500
15/32	11.906	6940	–	25.000	25900	4	101.600	309500

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

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

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

Ferrous Metal Steel Balls