Hastelloy G30 Nickel-Chromium Alloy Rods - Superior Corrosion Resistance for Extreme Environments

1. Performance Characteristics

1.1 Excellent Corrosion Resistance

Hastelloy G30 alloy exhibits extremely low corrosion rates in environments with strong oxidizing acids (such as nitric acid and hydrofluoric acid mixtures) and phosphoric acid. Its high chromium content (28.5%-31.5%) forms a dense passive film that effectively resists chloride ion attack, while molybdenum (4%-6%) enhances resistance to pitting and crevice corrosion. The alloy remains stable in mixed media containing fluoride and chloride ions, making it suitable for harsh environments such as the chemical and petroleum industries.

1.2 Excellent High-Temperature Stability

The alloy maintains stable mechanical properties at high temperatures (up to 1100°C), has a low coefficient of thermal expansion, and moderate thermal conductivity (10.2-16.7 W/m·K), making it suitable for high-temperature heat exchange equipment. With a melting point range of 1350-1370°C, it is not susceptible to deformation or failure during long-term service in high-temperature acid environments.

1.3 Excellent Processing and Welding Properties

Hastelloy G30 can be formed through processes such as cold working, hot rolling, and forging. It requires no subsequent heat treatment during welding and is compatible with gas shielded welding and arc welding. The heat-affected zone (HAZ) exhibits no grain boundary precipitation, minimizing corrosion sensitivity.

2. Main Applications

2.1 Chemical Equipment

Used in the manufacture of components such as reactors, heat exchangers, pumps, and valves, it withstands highly corrosive media such as phosphoric acid and sulfuric acid. Its corrosion rate is significantly lower than that of similar alloys in wet-process phosphoric acid (30%-80% concentration) environments.

2.2 Oil and Gas Industry

Used in pipelines and vessels in refineries and petrochemical plants, it resists corrosion from chlorine- and sulfur-containing media, ensuring equipment integrity under high-temperature and high-pressure conditions.

2.3 Marine Engineering and New Energy

Used in desalination equipment and offshore platform structures to resist seawater corrosion. In new energy applications, such as in lithium iron phosphate battery production equipment, it ensures durability in high-purity acid environments.