HASTELLOY® G-30® alloy (UNS N06030) is a highly corrosion-resistant nickel-base alloy designed for use in severe environments involving strong oxidizing agents. This article provides a comprehensive introduction to HASTELLOY® G-30® alloy, covering its chemical composition, mechanical properties, performance across different temperatures, industry applications, available shapes and sizes, production standards, welding and processing capabilities, as well as advantages, disadvantages, and comparisons with similar products.
Chemical Composition
Element
Composition (%)
Nickel (Ni)
46.0 – 49.0
Chromium (Cr)
29.0 – 31.5
Iron (Fe)
14.0 – 17.0
Molybdenum (Mo)
4.0 – 6.0
Cobalt (Co)
2.5 max
Tungsten (W)
1.5 – 4.0
Manganese (Mn)
1.0 max
Silicon (Si)
1.0 max
Carbon (C)
0.03 max
Phosphorus (P)
0.04 max
Sulfur (S)
0.02 max
Mechanical Properties
Property
Value
Tensile Strength, ksi (MPa)
100 (690) min
Yield Strength (0.2% offset), ksi (MPa)
45 (310) min
Elongation (% in 2 inches)
40 min
Hardness, Rockwell C (HRC)
28 max
Performance at Different Temperatures
HASTELLOY® G-30® alloy exhibits excellent performance across varying temperature ranges:
Room Temperature: Superior resistance to a wide range of oxidizing and reducing environments, including sulfuric acid, phosphoric acid, and nitric acid.
Elevated Temperatures: Maintains high strength and corrosion resistance up to 1800°F (980°C), suitable for applications in chemical processing and pollution control equipment.
Low Temperatures: Retains ductility and toughness at cryogenic temperatures, ensuring reliability in extreme conditions.
Industry Applications
HASTELLOY® G-30® alloy is utilized in various industries due to its exceptional corrosion resistance:
Industry Sector
Applications
Chemical Processing
Reactors, heat exchangers, and piping systems handling aggressive chemicals such as acids, chlorides, and fluoride solutions.
Pollution Control
Scrubbers, stack liners, and ducts exposed to corrosive gases and acidic environments.
Pharmaceutical
Pharmaceutical processing equipment requiring resistance to harsh chemicals and sterilization solutions.
Pulp and Paper
Equipment for bleach plants, digesters, and evaporators exposed to corrosive media.
Shapes, Sizes, and Production Standards
Product Form
Shapes Available
Sizes Available
Production Standards
Sheets/Plates
Plates, Sheets
Thickness: 0.025″ – 1.000″ (0.64mm – 25.4mm)
ASTM B582
Bars
Round bars, hexagonal bars
Diameter: 0.25″ – 6.0″ (6.35mm – 152.4mm)
ASTM B582
Tubes/Pipes
Seamless tubes, welded pipes
OD: 0.5″ – 6.0″ (12.7mm – 152.4mm)
ASTM B619, ASTM B622
Standards and Corresponding Grades
Country/Region
Standard/Grade
USA
UNS N06030
Europe
2.4603
Germany
NiCr30W16Cu
France
NC30FeDU
Welding, Processing, Polishing, Heat Treatment
Process
Details
Welding
Excellent weldability using TIG, MIG methods, ensuring strong and reliable joints in corrosive environments.
Processing
Machinable using conventional methods, offering flexibility in fabrication processes.
Polishing
Capable of achieving smooth finishes for enhanced corrosion resistance and aesthetic appeal.
Heat Treatment
Annealing at 2050°F (1121°C) followed by rapid quenching optimizes material properties and performance.
Cold Processing, Advantages, and Disadvantages
Aspect
Details
Cold Processing
Retains ductility and formability at room temperature, facilitating shaping and fabrication.
Advantages
Excellent resistance to a wide range of aggressive chemicals, high mechanical strength, and reliability in extreme environments.
Disadvantages
Higher initial cost compared to conventional stainless steels, limited availability of specific shapes and sizes.
Similar Products
Product Name
Comparison
HASTELLOY C-276 (UNS N10276)
Higher molybdenum content and broader resistance to oxidizing and reducing environments compared to G-30® alloy.
HASTELLOY C-22 (UNS N06022)
Higher chromium content and resistance to oxidizing and reducing acids, including wet chlorine and ferric and cupric chlorides.
Comparison of Similar Products
Property/Feature
Hastelloy G-30®
Hastelloy C-276
Hastelloy C-22
Nickel Content (%)
46.0 – 49.0
57.0
56.0
Molybdenum Content (%)
4.0 – 6.0
15.0 – 17.0
12.5 – 14.5
Chromium Content (%)
29.0 – 31.5
14.5 – 16.5
20.0 – 22.5
Tensile Strength (ksi)
100 min
110 min
115 min
Yield Strength (ksi)
45 min
52 min
55 min
Corrosion Resistance
Excellent in oxidizing and reducing acids, including sulfuric, phosphoric, and nitric acid.
Excellent in a wide range of corrosive environments, including strong oxidizers and reducing agents.
Excellent in oxidizing and reducing acids, including wet chlorine and ferric and cupric chlorides.
This detailed article serves as an in-depth introduction to HASTELLOY® G-30® alloy (UNS N06030), providing essential information on its composition, mechanical properties, performance characteristics, applications across various industries, available forms and sizes, production standards, welding and processing capabilities, as well as advantages, disadvantages, and comparisons with similar alloys. The structured presentation using tables ensures clarity and accessibility of technical details, catering to professionals seeking reliable corrosion-resistant materials for demanding environments.
