AISI 904L Stainless Steel Balls

Austenitic stainless steel, this material shows the highest corrosion resistance properties. This steel show excellent corrosion resistance against acids like phosphorous and sulphuric. As a standard practice at the Tolia Group all stainless steel 904L balls are supplied in a passivated condition.

Applications :

Chemical / Nuclear Industries
Applications where Alkaline water is in contact with the balls
Special valves

Chemical composition

%C	%Si	%Mn	%P	%S	%Cr	%Ni	%N	%Mo	%Cu
0.020 max	1.00 max	2.00 max	0.045 max	0.035 max	19.00-23.00	23.00-28.00	0.100 max	4.00-5.00	1.00-2.00

International Standards and material codes

USA	ITA	GER	FRA	UK	JAP
904L	X1 NiCrMoCu 25-20-5	1.4539	Z 2 NCDU 25-20	904S13	SUS 890L

Technical Properties

Property	Type	U.o.M.	Values	U.o.M.	Values
Hardness	Mechanical	[HRB]	65 - 95	-	-
Ultimate tensile strength	Mechanical	[MPa]	520 - 620	[psix10^3]	76 - 89

Size Range/Grade selection

Product	Size Range	U.o.M.	Grade Capabilities
Balls	3.00 mm to 40.00 mm	[mm]	GR.40 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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