1.4361
UNS S30600
X1 Cr Ni Si 18-15-4
F46
Applications :
- Mineral chemistry :Production of concentrated HNO3
- Organic chemistry :Use of concentrated HNO3 (nitration)
- Nuclear industry :Evaporator working in nitric environment, to concentrate products of fusion
- Metallurgical industry :Tanks – equipment destined for nitrogen sulphite mixtures
- Chemical industry :Chrome sulphite mixtures, very oxyding solutions
A strong addition of silicon to austenitic stainless steels of the 18/10 type has a favourable influence on resistance to transpassive intergranular corrosion. This type of corrosion develops particularly in very concentrated nitric environments (> 90 %) up to boiling point, also in strongly oxydising nitric environments (oxidising ions present such as : hexavalent chromium, pentalivalent vanadium – ferritic salts etc…)1.4361 has a chemical composition adapted to work in the transpassive zone. It resists perfectly to intergranular corrosion.
Mechanical Properties
| Tensile strength: | 530-730 | N/mm² |
| Yield strength 0,2% : | 210 | ≥ N/mm² |
| Elongation: | 40/30 | ≥ % |
| Hardness Brinell: | 230 | ≤ HB |
Chemical Composition
CARBON
C
0,015% max
SILICON
Si
3,7-4,5% max
MAGNESE
Mn
2,0% max
PHOSPHORUS
P
0,025% max
SULPHUR
S
0,005% max
CHROMIUM
Cr
16,5-18,5% max
NICKEL
Ni
14-16% max
NITROGEN
N
0,035% max
Heat Treatment
Corrosion testing
Welding
Marking
Certification
1100/1150°C (2010/2100°F) followed by rapid cooling.
OTHER Nitric acid grades
| Tensile strength: | 650-880 | N/mm² |
|---|---|---|
| Yield strength 0,2% : | 450 | ≥ N/mm² |
| Elongation: | 25 | ≥ % |
| Hardness HB30: | 270 | ≤ HB |
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