Industrial processes can be harsh on equipment and materials. Thus, industries often use specialized alloys to withstand corrosion and high temperatures. One such alloy is HASTELLOY® G-30®. When combined with HASTELLOY® G-30® Coated Electrodes, this high-performance alloy offers excellent corrosion resistance, even in highly oxidizing environments. This blog post will explore the composition, mechanical and physical properties, heat treatment, and uses of HASTELLOY® G-30® Coated Electrodes.
What are HASTELLOY® G-30® Coated Electrodes?
HASTELLOY® G-30® welding Electrodes is a unique super elastic alloy developed by Special Metals Corporation. It protects against cracking and pitting corrosion, even in highly aggressive chloride-containing environments. Furthermore, its superior weld performance makes it suitable for high-cycle fatigue applications and general fabrication projects. Its low diffusible hydrogen levels and exceptional metallurgical stability make the alloy ideal for critical applications such as pressure vessels, nuclear power plant components, chemical processing equipment, petrochemical plants, etc.
HASTELLOY® G-30® Welding Electrodes Composition
The primary composition of HASTELLOY® G-30® welding Electrodes includes nickel, chromium, iron, molybdenum, and tungsten. These elements result in exceptional corrosion resistance in both reducing and oxidizing environments. The presence of copper gives the alloy enhanced resistance to sulfuric acid and other acids containing oxidizing ions. Additionally, the low carbon content in the coating reduces the chances of carbide precipitation during welding.
| Nickel: | Balance |
|---|---|
| Chromium: | 28.0-31.5 |
| Iron: | 13.0-17.0 |
| Molybdenum: | 4.0-6.0 |
| Tungsten: | 1.5-4.0 |
| Copper: | 1.0-2.4 |
| Niobium + Tantalum | 0.3-1.5 |
| Cobalt: | 5.0 max. |
| Manganese: | 1.5 max. |
| Silicon: | 1.0 max. |
| Carbon: | 0.03 max. |
| Phosphorus: | 0.04 max. |
| Sulfur: | 0.02 max. |
| Other: | 0.50 max. |
HASTELLOY® G-30® Coated Electrodes Mechanical Properties
The mechanical properties of HASTELLOY® G-30® electrodes make them a popular choice in the chemical and petrochemical industries. The alloy exhibits high strength and excellent workability even at high temperatures. It has a tensile strength of 860 MPa (125,000 psi) and a yield strength of 415 MPa (60,000 psi).
| Tensile (psi) | 85,000 |
|---|---|
| Mpa | 590 |
| Elongation (%) | 25 |
HASTELLOY® G-30® Welding Electrodes Physical Properties
HASTELLOY® G-30® welding alloy have excellent physical properties. It resists stress-corrosion cracking and has a low coefficient of thermal expansion. The alloy has a density is 8.22 g/cm³, and its melting point is 1350°C (2462°F). The coefficient of thermal expansion is as low as 8.4×10^-6/ °C, making it a suitable choice for high-temperature applications.
HASTELLOY® G-30® Coated Electrodes Trade Names
| Class | UNS | Haynes |
| ENiCrMo-11 | W86030 | HASTELLOY® G-30® |
HASTELLOY® G-30® Welding Electrodes Uses
HASTELLOY® G-30® welding wire find use in various applications, including chemical processing, nuclear plants, and oil and gas industries. It is an ideal choice in industrial processes that involve highly corrosive and oxidizing environments. Its high strength, and excellent corrosion resistance make it an excellent choice for handling chemicals containing sulfur and chlorine that standard alloys cannot withstand.
HASTELLOY® G-30® Coated Electrodes Corrosion Resistance
The alloy’s high resistance to corrosion is one of its most significant advantages. HASTELLOY® G-30® filler wire can withstand various sulfuric, phosphoric, hydrochloric, and hydrofluoric acids. Moreover, it can also resist pitting, crevice corrosion, and intergranular attack. It also exhibits better corrosion resistance than other high-performance alloys like Hastelloy C-276.
HASTELLOY® G-30® Welding Electrodes Heat Treatment
HASTELLOY® G-30® filler metal can be welded and fabricated by various methods such as shielded metal arc welding (SMAW), gas tungsten arc welding (GTAW), and gas metal arc welding (GMAW). The heat treatment process of the alloy involves solution annealing and water quenching, followed by stabilization annealing at a temperature of 870°C (1600°F). The process helps to enhance the alloy’s mechanical properties while reducing the risk of stress-corrosion cracking.
Conclusion
HASTELLOY® G-30® Coated Electrodes offer excellent mechanical and physical properties, which make them a popular choice for industrial processes. Its composition, corrosion resistance, and heat treatment are ideal for high-temperature and highly corrosive environments. Its versatility and robustness make it suitable for chemical, petrochemical, nuclear plants, and oil and gas industries. With their superior properties, HASTELLOY® G-30® Coated Electrodes are indispensable for industrial processes that demand high-performance materials.
Meet Heer, a dynamic and driven writer learning tricks of her trade in the metal industry. With a background in Digital Marketing, Heer brings a unique perspective to her writing, sharing valuable insights. Apart from blogging she like reading and hiking.
