AISI 440C Stainless Steel Balls

Stainless Steel 440C Balls are martensitic and hardened in nature, the hardness achieved is excellent and also is good wear resistant. The highest surface finishing and tight dimensional tolerances can be manufactured with this material.

Applications :

High Precision bearings
Aerospace
Knotting devices
Oil and Gas Industry
Quick Release Couplings
Automotive Industry
Pharma Industry

Steel balls have good corrosion resistance and can withstand oil, petrol, steam and alcohol.

Chemical composition

%C	%Si	%Mn	%P	%S	%Cr	%Mo
0.95-1.20	1.00 max	1.00 max	0.040 max	0.030 max	16.00-18.00	0.75 max

International Standards and material codes

USA	GER	FRA	RUS	CHN	JAP
440C	1.4125	Z100CD17	95X18	9Cr18Mo	SUS440C

Technical Properties

Property	Type	U.o.M.	Values	U.o.M.	Values
Hardness	Mechanical	[HRC]	57 - 64	-	-
Ultimate tensile strength	Mechanical	[MPa]	1900 - 2000	[psix10^3]	275 - 290

Size Range/Grade selection

Product	Size Range	U.o.M.	Grade Capabilities
Balls	3.00 mm to 76.20 mm	[mm]	GR.10 to GR.2000 as per any international standard.

Comparison Chart- Material Corrosion Resistance
Material	CORROSION RESISTANCE
	Air		Water			Food			Liquor		Dilute Acid				Conc. Acid			Chemical
	Industrial Atmosphere	Salt Air	Wet Steam	Domestic Water	Sea Water	Food Product	Fruit & Veg. Juice	Dairy Product	Hot Sulfate	Dye	HCL	H2SO4	HNO3	Phosphoric	H2SO4	HNO3	Phosphoric	Ammonia	Alkaline Salt
AISI-E-52100	3	←	4	4	←	←	←	←	←	←	←	←	←	←	←	←	←	2	3
AISI-420	2	4	1	1	←	3	3	2	←	3	←	←	←	←	←	←	←	2	3
AISI 420C	2	4	1	1	←	3	3	2	←	3	←	←	←	←	←	←	←	2	3
AISI 440C	2	3	2	2	←	2	2	3	←	4	←	←	←	←	←	←	←	3	2
AISI 304/302	2	1	1	1	1	1	2	2	1	4	2	2	2	2	😑	2	2	1	1
AISI 316	2	1	1	1	1	1	1	1	2	4	←	2	1	2	1	1	1	1	2
AISI 1085	3	←	4	4	←	←	←	←	←	←	←	←	←	←	←	←	←	2	3

1=Excellent 2 = Good 3 = Fair 4 = Poor

← Will not withstand corrosion

😑 Varies

* = satisfactory only over 75% concentration

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