ASTM B622 UNS N06030 Pipe (Hastelloy G-30 / Alloy G-30)
ASTM B622 UNS N06030 covers seamless pipes and tubes manufactured from a nickel-chromium-iron-molybdenum-copper alloy known as Hastelloy G-30 or Alloy G-30. This alloy is specifically designed to deliver outstanding resistance to corrosion in phosphoric acid, nitric acid, and mixed acid environments containing chlorides and fluorides.
UNS N06030 pipes offer excellent weldability, fabricability, and long-term performance, making them ideal for fertilizer plants, chemical processing units, and aggressive acid service applications.
Key Features
- Exceptional resistance to phosphoric acid corrosion
- Excellent performance in nitric and mixed acid environments
- High resistance to pitting and crevice corrosion
- Good weldability and fabrication characteristics
- Stable mechanical properties over a wide temperature range
- Reliable performance in chloride-bearing environments
Equivalent Grades
| Standard | Grade |
|---|---|
| UNS | N06030 |
| W.Nr | 2.4603 |
| DIN | NiCr30Fe15Mo |
| Trade Names | Hastelloy G-30, Alloy G-30 |
ASTM B622 UNS N06030 Chemical Composition
| Element | Content (%) |
|---|---|
| Nickel (Ni) | Balance |
| Chromium (Cr) | 28.0 – 31.5 |
| Iron (Fe) | 13.0 – 17.0 |
| Molybdenum (Mo) | 4.0 – 6.0 |
| Copper (Cu) | 1.5 – 2.5 |
| Tungsten (W) | ≤ 1.5 |
| Cobalt (Co) | ≤ 5.0 |
| Carbon (C) | ≤ 0.03 |
| Manganese (Mn) | ≤ 1.50 |
| Silicon (Si) | ≤ 0.80 |
| Phosphorus (P) | ≤ 0.04 |
| Sulfur (S) | ≤ 0.02 |
Hastelloy G-30 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 620 MPa (min) |
| Yield Strength (0.2% Proof) | 240 MPa (min) |
| Elongation | 40% (min) |
| Hardness | ≤ 95 HRB |
Alloy G-30 Physical Properties
| Property | Value |
|---|---|
| Density | 8.22 g/cm³ |
| Melting Range | 1320 – 1370°C |
| Thermal Conductivity | 11.0 W/m·K |
| Electrical Resistivity | 1.24 µΩ·m |
| Modulus of Elasticity | 205 GPa |
Type of ASTM B622 UNS N06030 Pipe
- UNS N06030 Seamless Pipe
- UNS N06030 Seamless Tube
- Hot Finished Pipes
- Cold Drawn Pipes
- Bright Annealed Tubes
- Chemical Process Pipes
- Heat Exchanger Tubes
Applications
- Phosphoric acid production plants
- Fertilizer and agrochemical industries
- Chemical processing equipment
- Acid pickling and metal finishing lines
- Heat exchangers and condensers
- Petrochemical and refinery units
- Scrubbers and pollution control systems
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