Hastelloy B3 is a high-performance alloy that provides a reliable solution for severe corrosion. Standard stainless steel pipes and stainless steel pipe fittings often lacks the needed endurance. This is especially true with reducing acids. This is where Hastelloy B3 offers a superior solution.
What is Hastelloy B3 | UNS N10675
Hastelloy B3 is a nickel-based alloy which belongs to the Hastelloy family. It has a high nickel and molybdenum content, this gives it excellent resistance.It resists corrosion from hydrochloric acid, sulfuric acid, and phosphoric acid while exhibiting excellent thermal stability. This is especially true at high temperatures and makes Hastelloy B3 a top choice.
Key Advantages of Hastelloy B3
Hastelloy B3 is very strong. It resists non-oxidizing acids and handles hydrochloric and sulfuric acids well.
It is stable under heat. It resists sensitization. This means its corrosion resistance stays strong after welding. This is a key feature for fabricated systems.
This alloy is easy to form. It can be readily welded. This is crucial for complex fabrications. It ensures strong, reliable joints for piping systems.
It prevents stress corrosion cracking in harsh environments. This is vital in chloride-rich solutions. It ensures system integrity under stress.
Chemical Composition
| Element | Ni | Mo | Cr | Fe | Co | Mn | Si | C |
|---|---|---|---|---|---|---|---|---|
| Content (wt%) | Balance | 27.0 – 32.0 | 1.0 – 3.0 | 1.5 Max | 3.0 Max | 3.0 Max | 0.20 Max | 0.01 Max |
Mechanical Properties
| Property | Tensile Strength | Yield Strength (0.2% Offset) | Elongation | Hardness | Density |
|---|---|---|---|---|---|
| Value (Typical) | ≥760MPa(110ksi) | ≥350MPa(51ksi) | ≥40 | ≤210 | 9.22g/cm³ |
Hastelloy B3 VS Sensitized Stainless Steel
| Property | Hastelloy B3 (Welded) | Sensitized Stainless Steel (Welded) |
|---|---|---|
| Corrosion Resistance | Excellent | Poor (in weld zone) |
| Weld Zone Integrity | Strong, stable | Brittle, weak |
| Vulnerability | Low | High |
Hastelloy B3 in High Pressure Piping Systems
- Chemical Processing: Handles hydrochloric acid and withstands boiling sulfuric acid, significantly extending equipment lifespan.
- Pollution Control: Desulfurization systems resist highly corrosive acidic condensates, ensuring long-term structural integrity.
- Agricultural Chemical Industry: Powerful pesticides and fertilizers. This alloy resists corrosion from multiple chemicals.
- High-Temperature Systems: Shafts, valves, and fasteners. Maintains stable performance in high-temperature environments, with thermal stability as a key advantage.
- Piping Systems: Key stainless steel pipe fittings. These components require exceptional corrosion resistance to guarantee system integrity.
Sourcing and Fabricating Hastelloy B3
A complete Material Test Report (MTR) is required. It verifies the precise composition of the alloy and ensures its performance.
Work with specialized suppliers of stainless steel pipe and fittings. They understand these alloy steels and can ensure proper fabrication and quality control,and are ISO 9001 and CE-PED certified.
This alloy requires specific procedures. Proper welding technique ensures the integrity of the weld.
It is expensive, so it is important to assess whether the product has a longer service life. This can justify its higher initial cost.
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