The Specialist for Hydrochloric Acid (HCl) Applications

Hastelloy B-3 is the latest evolution in the "B" series alloys, specifically engineered to handle extreme concentrations of hydrochloric acid at all temperatures. It represents a significant technological leap in thermal stability over its predecessor, B-2.

• HCl Specialist: Unmatched resistance to hydrochloric acid, hydrobromic acid, and sulfuric acid in reducing environments.

• Enhanced Thermal Stability: The sophisticated micro-structure of B-3 prevents the formation of brittle intermetallic phases during processing, making it easier to fabricate and weld than earlier B-series alloys.

• Pitting Resistance: While primarily for reducing acids, it maintains good resistance to stress-corrosion cracking.

• Core Applications: Critical for chemical plants involved in acid catalysis, pesticide production, and high-temperature HCl synthesis units.

Hastelloy Alloy Comparison: C-276, C-22, B-3, and X

1. Chemical Composition (Nominal Weight %)

This table illustrates the unique metallurgical profiles of different Hastelloy grades, highlighting the balance of Nickel, Chromium, and Molybdenum.

2. Mechanical & Physical Properties (Typical Values)

3. Application & Corrosion Resistance Guide

Each grade is optimized for specific industrial challenges. Choosing the right one ensures longevity and safety.

• Hastelloy C-276: The "Workhorse." Best for mixed acid environments, flue gas desulfurization (FGD), and pulp/paper production.

• Hastelloy C-22: Superior resistance to oxidizing aqueous media and better thermal stability during welding than C-276.

• Hastelloy B-3: Specifically engineered for Hydrochloric Acid (HCl) at all concentrations and temperatures. It has improved thermal stability over B-2.

• Hastelloy X: Known for excellent oxidation resistance and strength at high temperatures (up to 1200°C). Ideal for gas turbines and furnace parts.

• Hastelloy C-2000: The most versatile alloy for mixed acid systems containing both oxidizing and reducing agents.