1. Introduce
– Ni-Cr alloy with additions of Mo, W and Cu
– Improved version of Hastelloy G3 (with Cr, Co, W)
– Highly corrosion resistant in strongly acidic environments
– UNS N06030
* UNS
- Abbreviation for Unified Numbering Systems for Metals and Alloys
- Unified numbering system for metals and alloys
- A representative number that is compatible with metals and alloys defined in many material-related codes such as ASTM, AISI, ASME, AWS, etc.
* N : Nickel and nickel alloys
* UNS N06030 : 06XXX : Chromium(Hastelloy, Inconel, some with additional element)
* Hastelloy
– A corrosion-resistant alloy with Ni as the main component
– Excellent machinability, weldability, and can be machined into various shapes
– Main types and characteristics
- Hastelloy B
* Main composition
– Ni-Mo
* Characteristics
– Hydrochloric acid-resistant alloy : Excellent hydrochloric acid resistance by containing a large amount of Mo
– Corrosion resistance in non-oxidizing atmosphere, excellent resistance to hydrogen chloride gas and reducing solution - Hastelloy C
* Main composition
– Ni-Cr-Mo
* Characteristics
– Oxidation resistance alloy : Excellent oxidation resistance by containing a large amount of Cr
– Excellent corrosion resistance in oxidizing atmospheres such as nitric acid and chlorine due to the addition of Cr - Hastelloy G
* Main composition
– Ni-Cr-Fe-Mo
* Characteristics
– Reinforced with Mo, Cu to improve corrosion resistance to sulfuric and phosphoric acids
– Good corrosion resistance in welds, good chloride intergranular corrosion resistance - Hastelloy X
* Main composition
– Ni-Cr-Fe-Mo
* Characteristics
– Alloy designed for good oxidation resistance at 1200℃, Good corrosion resistance in oxidizing, sulfuric and phosphoric acid atmospheres
2. Property
– Good corrosion resistance to strong acidic environments
– Prevents grain boundary precipitation in the weld heat zone
| Element | Impact |
|---|---|
| Ni | Provides corrosion resistance |
| Cr | Provides oxidizing and non-oxidizing acid resistance |
| Cu | Provides reducing chemical resistance, weldability, and ductility |
| Si | Forms stable oxide film, increases chromium oxide film stability |
| Mn | Provides machinability, weldability → Prevents formation of grain boundary deposits in the weld heat zone → Can be used in the as-welded condition for chemical process applications |
| Mo | Provides localized corrosion resistance |
| Co | Provides strength, creep properties |
| W | Provides corrosion resistance |
[Hastelloy G30 Chemical Composition (%)]
| Ni | Cr | Fe | C | Cu |
|---|---|---|---|---|
| 30.21 ~ 52.20 | 28.00 ~ 31.50 | 13.00 ~ 17.00 | Max. 0.03 | 1.00 ~ 2.40 |
| Si | Mn | Mo | S | Co |
|---|---|---|---|---|
| Max. 0.80 | Max. 1.50 | 4.00 ~ 6.00 | Max. 0.02 | Max. 5.00 |
| W | P | Nb + Ta | ||
|---|---|---|---|---|
| 1.50 ~ 4.00 | Max. 0.04 | 0.30 ~ 1.50 |
[Hastelloy G30 Mechanical Properties]
| Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) |
|---|---|---|
| 1096 | 1000 | 12 |
[Hastelloy G30 Physical Properties]
| Density (g/cm³) | Melting Range (℃) |
|---|---|
| 8.22 | 1370 ~ 1400 |
3. Standard & Specification
– Specification : UNS N06030
| Product Form | ASTM | ASME | AWS |
|---|---|---|---|
| Sheet, Plate, Strip | B582 | SB582 | – |
| Billet, Rod, Bar | B472 | SB581 | – |
| Coated Electrodes | – | – | A5.11(ENiCrMo-11) |
| Bare Welding Rods, Wire | – | – | A5.14(ERNiCrMo-11) |
| Seamless Pipe, Tube | B622 | SB622 | – |
| Fittings | B366, B462 | SB366, SB462 | – |
| Forgings | B462 | SB462 | – |
4. Available Form
– Sheet, Plate, Strip
– Billet, Rod, Bar
– Coated Electrodes
– Bare Welding Rods, Wire
– Seamless Pipe, Tube
– Welded Pipe, Tube
– Fittings
– Forgings
5. Application & Product
– Gas & Oil, Nuclear Power
| Application | Product |
|---|---|
| Gas & Oil | Oil well pipes, wet phosphoric acid production evaporators |
| Nuclear Power | Nuclear fuel tanks, nuclear fuel reprocessing equipment, pickling equipment |
(1) Wet Phosphoric Acid Production Evaporator / (2) Nuclear fuel tanks
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