Hastelloy G-35 (UNS N06035)
Hastelloy G-35 (UNS N06035) is a nickel-chromium-molybdenum alloy designed to resist “wet process” phosphoric acid, which is used in the production of fertilizers. Similar to Hastelloy G-30, Hastelloy G-35 alloy also has excellent resistance to localized attack in the presence of chlorides, since this can be a problem beneath deposits in evaporators used to concentrate “wet process” phosphoric acid. Besides, it is much less susceptible to chloride-induced stress corrosion cracking than the stainless steels and nickel-chromium-iron alloys traditionally used in “wet process” phosphoric acid.
Due to the high chromium content, Hastelloy G-35 is extremely resistant to other oxidizing acids, such as nitric, and mixtures containing nitric acid. It possesses moderate resistance to reducing acids, as a result of its appreciable molybdenum content and unlike other Ni-Cr-Mo alloys, it is very resistant to “caustic dealloying” in hot sodium hydroxide.
Equivalent Grades
Trademarks | GB | JIS | KS | ASTM | UNS | DIN | W.Nr | GOST | BS | NF |
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Hastelloy G-35 | – | – | – | Hastelloy G-35 | N06035 | NiCr33Mo8 | 2.4643 | – | – | – |
Product Forms
Wire, Bar, Strip, Sheet, Plate, Tube, Pipe, Pipe Fittings, Forgings
Chemical Composition,%
C | P | S | Mn | Si | Cr | Ni | Co | Mo | W | Al | Cu | V | Fe |
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≤0.05 | ≤0.03 | ≤0.015 | ≤0.50 | ≤0.60 | 32.25~34.25 | Bal | ≤1.00 | 7.60~9.00 | ≤0.60 | ≤0.40 | ≤0.30 | ≤0.20 | 17.00~20.00 |
Typical Physical & Mechanical Properties (RT, Solution Annealed)
Density, g/cm3 | Melting Point, ℃ | Tensile Strength, MPa | Yield Strength, MPa | Elongation,% |
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8.22 | 1332~1361 | 710 | 317 | 66 |
Specifications
Rod, Bar, Wire, Forgings | ASTM B462, ASTM B472, ASTM B564, ASTM B574, ASME SB462, ASME SB472, ASME SB564, ASME SB574 |
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Plate, Sheet, Strip | ASTM B575, ASME SB575 |
Pipe, Tube | ASTM B619, ASTM B622, ASTM B626, ASME SB619, ASME SB622, ASME SB626 |
Welding Products | AWS A5.14 ERNiCrMo-22, ASME Ⅱ SFA-5.14 ERNiCrMo-22, ASME Ⅸ F-No.43 |
Others | ASTM B366, ASTM B462, ASME SB366, ASME SB462, DIN 17744 |
Features
- Excellent resistance to chloride pitting and creative corrosion cracking
- Immune to chloride ion stress corrosion
- Maintains high strength at elevated temperatures
- Resistant to sea water, in both flowing and stagnant condition
- Heat resistant
Applications
- Marine engineering
- Furnace & gas turbines
- Chemical processing involving phosphoric acid, sulfuric acid and nitric acid
- Nuclear fuel reprocessing, nuclear waste processing
- Pickling operations
- Petrochemical
- Fertilizer manufacture
- Pesticide manufacture
- Gold ore extraction