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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