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 with excellent wear resistance. Usually vacuum degassed and uniformly through hardened in atmosphere controlled electric furnaces.

International Equivalents

AISI 52100, EN31, JIS G4805 SUJ2, Wks 1.3505

Material Specification

Composition
C	0.95 - 1.10 %
Cr	1.30 - 1.60 %
Mn	0.25 % Max
Si	0.15 - 0.30 %
P	0.03 % Max
S	0.025 % Max

 

Hardness
HRc	60 - 67

 

Mechanical Properties
Tensile Strength	325,000 psi
Yield Strength	295,000 psi
Density	0.283 lbs/cu in

 

Size Range
0.635mm (0.025") to 101.6mm (4")

 

Standard Grades Available
5
10
25
100
500

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		1 1/16	26.987	29600
5/32	3.969	990		17/32	13.494	8660		1 1/8	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	2280		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