440C Stainless Steel Miniature Balls

440C stainless steel balls exhibit excellent toughness and hardness properties combined with corrosion resistance. Typical applications include ball bearings, ball screws, ball bushings, valve applications and applications where some level of corrosion resistance is required. Vacuum Induction melted/vacuum arc re-melted (VM)-(VIN-MAR) materials are available upon request.

Passivation to ASTM A380 and QQ P 35 is available upon request.

MATERIAL CONVERSION STANDARDS – 440C Stainless Steel

MATERIAL	AISI	FEDERAL	DIN	ASTM	JIS	AMS	MIL. & GOV'T STANDARDS
Stainless Steel	440C	QQ-S-763	X105CrMo17	A276-89	SUS440C	5630G	MS 19060

Material Analysis:

AISI 440C* Stainless Steel Balls are uniformly hardened and tempered throughout their entire diameter in conformance to MIL-H-6875. Ball hardness is controlled to within a range HRC 58 - 65 as measured on a parallel surface.

*440C type Stainless Steel balls are magnetic

CHEMICAL ANALYSIS		MECHANICAL PROPERTIES
Carbon	0.95 to 1.20%	Tensile Strength	285,000 psi
Chromium	16 to 18%	Yield Strength	275,000 psi
Manganese	1.0% Max	Elongation in two inches	2%
Silicon	1.0% Max	Reduction in area	10%
Phosphorus	0.04% Max	Modulus of elasticity	29,000,000 psi
Sulfur	0.03% Max	Density	.277 lbs./cu. In.
Nickel	0.75% Max
Molybdenum	0.40 - 0.65%

Available Grades and Sizes:

GRADE	SIZE RANGE
	Inches	Millimeters
100, 200	0.007" - 0.160"	0.2mm - 4mm
3, 5, 10, 24, 48	0.015" - 0.160"	0.5mm - 4mm

Balls per Pound:

SIZE		# BALLS PER POUND
Inch	Metric
.007		20,101,369
.010		6,894,770
.015		2,042,895
.020		861,846
.025		441,265
1/32		225,925
0.0394	1mm	112,986
3/64		66,942
1/16		28,241
5/64		14,473
0.0787	2mm	14,123
3/32		8,368
7/64		5,269
0.1181	3mm	4,185
1/8		3,350
9/64		2,479
5/32		1,807
0.157	4mm	1,780

Contact us for more information on these or any other materials.