Products Features
Exceptional Resistance to Reductive Acid Corrosion
The high molybdenum content (26-30%) endows Hastelloy B with nearly perfect corrosion resistance in reducing media such as hydrochloric acid, dilute sulfuric acid, and phosphoric acid, far superior to conventional austenitic stainless steels and most nickel-based alloys.
Excellent hydrochloric acid corrosion resistance
Maintains stability in hydrochloric acid across all concentrations below boiling point, with no tendency for pitting or intergranular corrosion. It also resists non-oxidizing acids such as hydrogen chloride gas, formic acid, and acetic acid.
Good intergranular corrosion resistance
Designed with low carbon (≤0.01%) and low silicon (≤0.08%), significantly reducing the risk of carbide and silicide precipitation in the weld heat-affected zone. It can be used in most corrosive environments in the as-welded condition without post-weld heat treatment.
Moderate sulfuric and phosphoric acid corrosion resistance
Performs well in sulfuric and phosphoric acids at moderate concentrations or lower, particularly suitable for non-oxidizing acidic solutions containing chlorides or fluorides.
Good formability and weldability
Can be formed hot or cold using conventional processes, with good weldability (GTAW, GMAW, SMAW). It is recommended to use matching Hastelloy B welding wire. Oxidizing atmospheres (such as nitric acid or oxygen-containing solutions) should be avoided, as they would significantly increase the corrosion rate.
Technical Specifications
Chemical Composition
| Element | Standard Requirements | Notes |
| Ni | Remaining Quantity (≥ 65%) | Elements that provide austenite stability and a corrosion-resistant substrate |
| Mo | 26.0 – 30.0% | Corrosion-resistant elements that provide corrosion resistance in reducing acids |
| Fe | ≤ 5.0% | Limit iron content to prevent the formation of harmful phases |
| Cr | ≤ 1.0% | Extremely low chromium content, avoiding passivation failure in reducing acids |
| C | ≤ 0.01% | Extremely low carbon content to prevent intergranular corrosion |
| Si | ≤ 0.08% | Low silicon content to prevent precipitation of silicides |
| Mn | ≤ 1.0% | Deoxidizer |
| P | ≤ 0.020% | Impurity elements |
| S | ≤ 0.010% | Prevent hot brittleness |
Physical Properties
| Property | Value/Range | Test Conditions |
| Density | 9.24 g/cm³ | Room temperature (20°C) |
| Melting Point | 1330 – 1380°C | - |
| Coefficient of Thermal Expansion (20-100°C) | 10.3 × 10⁻⁶ /K | - |
Mechanical Properties (Annealed Condition, Typical Values)
| Property | Typical Value | Specification |
| Tensile Strength | ≥ 690 MPa | ASTM B333 / B335 |
| Yield Strength | ≥310MPa | ASTM B333 / B335 |
| Elongation | ≥40% | ASTM B333 / B335 |
| Hardness | ≤ 100 HRB | - |
High-temperature performance
Hastelloy B is not recommended for use in oxidizing atmospheres (such as nitric acid, oxygen-containing solutions), as it will rapidly oxidize and fail in high-temperature oxidizing environments. Its intended application is in reducing acid media, with a recommended maximum continuous service temperature of≤ 450°C.
Pitting Resistance Equivalent (PREN):Not applicable (the PREN calculation formula is primarily used for chromium-containing stainless steels; Hastelloy B has extremely low chromium content and does not rely on pitting resistance equivalent for evaluation).Critical Pitting Temperature (CPT):There is no concept of pitting in reducing acids; however, uniform corrosion may occur in the presence of oxidizing impurities.Applicable Media:Hydrochloric acid (all concentrations, below boiling point)Dilute sulfuric acid (≤60%, especially when containing chloride ions)
Phosphoric acid (non-oxidizing)Organic acids such as formic acid, acetic acid, and lactic acidHydrogen chloride gas (dry or wet state)Vinyl acetate, reaction medium for pesticide synthesisAcidic oil fields (containing H₂S and CO₂, anoxic)
Hastelloy B is specifically designed for highly reducing acid corrosion environments and is recommended for use in the following areas:
Application Fields
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Hydrochloric acid handling equipment: hydrochloric acid evaporators, absorbers, tanks, and pipelines.
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Acetic acid/acetic synthesis: acetic acid reactors, distillation columns, and heat exchangers.
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Pesticide intermediate synthesis: chlorination reactors and acyl chloride equipment.
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Phosphoric acid concentration: phosphoric acid evaporators (without oxidizing impurities).
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Formic acid and lactic acid production: organic acid reactors.
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Acidic oil and gas fields: pipelines for acidic gases containing H₂S and Cl⁻.
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Pharmaceutical industry: synthesis of reducing drug intermediates.
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Fine chemical industry: equipment for strongly reducing chemicals such as thionyl chloride and chlorosulfonic acid.
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Nuclear fuel reprocessing: dissolvers in hydrochloric acid media.
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Hydrometallurgy: hydrochloric acid leaching processes.
Delivery and Customization
We offer flexible and reliable supply chain solutions to ensure you receive Hastelloy B materials that perfectly match your project requirements.
|
Form |
 Sheet/Plate
|
 Bar/Rod
|
 Seamless Pipe
|
 Strip/Sheet Coil
|
 Wire/Wire Rod
|
|---|---|---|---|---|---|
|
Conventional Range |
Thickness: 0.5 - 100 mm |
Diameter Φ6-500mm |
Outer diameter Φ10-300mm |
Thickness: 0.1 – 3.0 mm |
Diameter Φ0.5-10mm |
|
Customization Capability |
Special thick/ thin rolling, ultra-wide plates; special surface treatment, fixed-length cutting |
Large-sized forged bars (up to Φ800 mm), special-shaped bars, and various heat treatment conditions |
Large-diameter thick-walled pipes, special alloy composition; Pipe end processing (beveling, fixed length) |
Different hardness conditions, special heat treatments (stabilization treatment, grain size control), acid-washed surfaces, electrolytic polishing, coatings, or special protective films |
Special surface treatment, precision drawing |
Why Choose Us? - Reliable engineering technology. Dependable delivery.
We are not just a supplier, but a trusted materials partner for you in China.
Vertically Integrated Production
Own 20,000㎡ facility with 10+ automated lines (8,000+ tons/year). In-house tooling & die center enables rapid customization and effective cost control - no middleman markup.
Strict Quality Control at Every Stage
Full traceability across key QC checkpoints throughout production. 100% compliant with ASTM/ASME, EN, and GB standards. Material test reports available with every shipment
Reliable Delivery & Export Packaging
10+ years exporting to Europe, North America, Southeast Asia & Middle East with waterproof and anti-rust protection, combined with flexible shipping options ensures safe and on-time arrival.
Sample Validation Before Mass Production
We provide free samples for quality verification, allowing you to place bulk orders only after approval. We ensure consistency from sample to mass production by accurate dimensional measurement and transparent manufacturing.
FAQ
Q: What are the main advantages of Hastelloy B?
Q: What kind of heat treatment is required for Hastelloy B?
Q: What is the maximum service temperature?
Q: What is the difference between it and Hastelloy C-276?
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