NS334
Materialgrade: NS334 corrosion resistant alloy
US grade: UNS N06455
Equivalent grade: Hastelloy C-276
German grade: W,Nr,2.4610
I. overview:
NS334 (Hastelloy C-276. N06645) alloy is atungsten-containing nickel-chromium-molybdenum alloy with extremely low siliconand carbon content. Compared with NS333. NS334 has a carbon content of 0,06%smaller than that of NS333. It is an ultra-low carbon alloy steel with lowercorrosion resistance and intergranular corrosion sensitivity than NS333 alloysteel, which increases the anti-pitting tendency.
1, The characteristics
(1) Excellent corrosion resistance to mostcorrosive media in the oxidized and reduced state,
(2) Excellent resistance to pittingcorrosion, crevice corrosion and stress corrosion cracking,
2. Application fields
Widely used in the chemical and petrochemicalindustries, such as in the contact with chloride-containing organic componentsand catalytic systems. This material is especially suitable for use in hightemperature, inorganic and organic acids (such as formic acid and acetic acid)and seawater corrosive environments.
Other application areas:
(1) pulp and paper industry, such asdigestion and bleaching containers
(2) washing towers in FGD systems,reheaters, wet steam fans, etc,
(3) equipment and components operating inacid gas environment
(4 ), reactor for acetic acid and acidicproducts
(5) sulfuric acid condenser
(6) methylene diphenyl isocyanate (MDI)
(7) production and processing of impurephosphoric acid
3. chemical composition: %
C≤ | Si≤ | Mn≤ | P≤ | S≤ | Cr≥ | Ni≥ | Mo≥ | Cu≤ |
0.02 | 0.08 | 1 | 0.04 | 0.03 | 14.5-16.5 | balance | 15.0-17.0 | - |
other | Al≤ | Ti≤ | Fe≤ | N≤ | Co≤ | Nb≤ | W≤ | V≤ |
- | - | 4.0-7.0 | - | 2.5 | - | 3.00-4.50 | 0.35 |
4. physical properties:
(1) Density: ρ = 8.9g / cm 3
(2) Melting temperature range: 1325 ~ 1370° C
Ⅲ. Classification and Ex-factory status:
1,Classification: We can produce various specifications of seamless pipe, steelplate, round steel, forging, flange, ring, welded pipe, steel strip, wire and supporting Weldingconsumables,
2.Ex-factory status: Seamless pipe: solid solution + acid white, with customizable length; Sheet: solidsolution, pickling, trimming; Welded pipe: solid solution acid white + RT% flawdetection, forgings: annealing + lathe processing; Bar: forging, with surfacepolishing or lathe processing; Strip: cold-rolled, solid solution soft phase,and descaled; Wire: solid solution pickling coil or straight strip, solidsolution straight strip with polishing surface.
