Hastelloy G-30/G35
Density: 8.22 g/cm³
Equivalent designations: Hastelloy G-30 Alloy , UNS N06030, DIN W.Nr 2.4603
Hastelloy G-35 Alloy, UNS N06035, DIN W.Nr 2.4643, Alloy G-35
Product introduction
Hastelloy G-30 is an improved version of nickel-chromium-iron-molybdenum-copper alloy G-3. With higher chromium, added cobalt and tungsten, the G-30 shows superior corrosion resistance over most other nickel and iron based alloys in commercial phosphoric acids as well as complex environments containing highly oxidizing acids. The resistance of the alloy to the formation of grain boundary precipitates in the heat-affected zone makes it suitable for use in most chemical process applications in the as-welded condition.
Hastelloy G-35 is a nickel-chrimium-molybdenum alloy designed to resist “wet process” phosphoric acid, which is used in the production of fertilizers. Similar to Hastelloy G-30, G35 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 de-alloying” in hot sodium hydroxide.
Available products for Hastelloy G30/G35:
Welded pipe/tube
Seamless pipe/tube
Pipe fittings
Flanges
Bar/Profiles
Sheet/ Plate/Coil/Strip
Wire/Wire rope
Forgings
Welding Rod
Fastener
Hastelloy G-35 is a nickel-chrimium-molybdenum alloy designed to resist “wet process” phosphoric acid, which is used in the production of fertilizers. Similar to Hastelloy G-30, G35 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 de-alloying” in hot sodium hydroxide.
Available products for Hastelloy G30/G35:
Welded pipe/tube
Seamless pipe/tube
Pipe fittings
Flanges
Bar/Profiles
Sheet/ Plate/Coil/Strip
Wire/Wire rope
Forgings
Welding Rod
Fastener
Chemical composition:
|
Grade
|
Chemical Component % | |||||||||||||||
| Ni | Cr | Mo | W | Fe | Mn | C | Si | S | P | Co | Cu | Nb | Co+Ta | V | Al | |
| Hastelloy G-30 | Balance | 28.0-31.5 | 4.0-6.0 | 1.5-4.0 | 13.0-17.0 | Max 1.5 | Max 0.03 | Max 0.8 | Max 0.02 | Max 0.04 | Max 5.0 | 1.0-2.4 | 0.3-1.5 | 0.3-1.5 | ||
| Hastelloy G-35 | Balance | 32.25-34.25 | 7.6-9.0 | Max 0.6 | Max 2.0 | Max 0.5 | Max 0.05 | Max 0.6 | Max 0.015 | Max 0.3 | Max 1.0 | Max 0.3 | Max 0.2 | Max 0.3 | ||
Application for hastelloy G-30
1. Chemical processing involving phosphoric acid, sulfuric acid and nitric acid;
2. Gas scrubbers
3. acid production and pickling;
4. petrochemical;
5. nuclear fuel reprocessing;
6. nuclear waste processing;
Hastelloy G-35 mostly use for P2O5 evaporator tubes