Hastelloy B est une famille de nickel-molybdenum superalloys. A key solution for applications where standard tuyaux en acier inoxydable ou raccords de tuyauterie en acier inoxydable would fail. This superalloy delivers exceptional resistance to reducing acid environments. Extremely corrosive chemicals are handled with ease.
Introduction to the Hastelloy B Series
The Hastelloy B series is a specialized group of alloys.Remarkable corrosion resistance comes from a unique composition.Key elements include nickel and molybdenum.Molybdène provides exceptional resilience against hydrochloric acid.Sulfuric and phosphoric acids also work well with the material.
Qu'est-ce que l'alliage Hastelloy ?
Alliage Hastelloy contains a high proportion of nickel, and also contains chromium and molybdenum. The family includes three main series. They are the B series, C series, and G series. Each is designed for specific environments.
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Key Advantages of Hastelloy B Series
Hydrochloric acid is resisted in all concentrations. Sulfuric and phosphoric acids are also effectively fought.
Properties are maintained at high heat. The alloy resists thermal stress. Long service life is ensured in demanding applications.
Easy fabrication is a major benefit. Strong welds are formed without loss of properties. Complex pipes and fittings are thus simpler to create.
The alloys show great resilience against fissuration par corrosion sous contrainte. This is a common failure point for many stainless steels. A system’s safety and integrity are ensured by this property.
Key Disadvantages of Hastelloy B Series
Costly elements are found in the alloy’s composition. Nickel and molybdenum increase its price. The material is much more expensive than standard stainless steels.
Poor reactions occur with oxidizing agents. These include nitric acid and ferric salts. A major limitation for this alloy is its poor performance here.
High hardness makes machining difficult. Specialized tools and speeds are required. Fabrication time and expense are both increased.
As a specialized alloy, widespread availability is not guaranteed. Longer project lead times can be a result.
The Natural Degradation Process of Hastelloy B
- Creep and Stress Rupture: High temperatures and constant stress can cause a slow, permanent deformation. Creep deformation is the name for this process. Over many years, eventual failure can result. A gradual decrease in the alloy’s strength occurs over time.
- Fatigue: Small cracks can form over time in parts exposed to repeated stress cycles. These cracks grow and spread. Ultimately, the part can fail.
- Long-Term Corrosion: While highly resistant, prolonged exposure to aggressive chemicals can cause degradation. Piqûres or surface thinning can occur over many years. This happens very slowly, but it is a natural part of the alloy’s life.
- Oxidizing Environments: This alloy does not handle oxidizing agents well. Exposure to such chemicals over time can cause severe, rapid corrosion. A dramatic shortening of its lifespan is the result.
Common Hastelloy B Grades
| Grade | Éléments clés | Avantage principal |
|---|---|---|
| Hastelloy B2 | Ni/Mo | Résistance à l'acide chlorhydrique |
| Hastelloy B3 | Ni/Mo | Stabilité thermique accrue |
| Hastelloy B4 | Ni/Mo | Bonne stabilité thermique |
Hastelloy B VS Stainless Steel
| Caractéristique | Hastelloy B | Acier inoxydable |
|---|---|---|
| Acide chlorhydrique | Excellent | Pauvre |
| Nitric Acid | Pauvre | Excellent |
| Résistance aux chlorures | Bon | Bon |
| Coût | Très élevé | Moyen |
| Utilisation principale | Reducing Acid Environments | Résistance générale à la corrosion |
Hastelloy B Series in Piping Systems
- Chemical Processing: Extreme corrosion resistance is provided by Hastelloy B for critical stainless steel pipe fittings. Your system works perfectly, even with aggressive reducing chemicals.
- Reactors and Vessels: A perfect material for chemical reactors and vessels. The alloy withstands highly corrosive acids. Efficient and safe operation is ensured by its use.
- Pharmaceutical Industry: Hastelloy B is an excellent choice. A high-purity system is ideal for this material. The alloy resists corrosion and prevents product contamination.
- Acetic Acid Production: Essential for pipes and fittings in acetic acid production. Hastelloy B handles the corrosive process. The alloy maintains its integrity. This prevents leaks and costly downtime.
Approvisionnement et fabrication d'alliages Hastelloy
Un complet Rapport d'essai des matériaux (MTR) est nécessaire. Il vérifie la composition précise de l'alliage et garantit ses performances.
Travailler avec fournisseurs spécialisés de tubes et raccords en acier inoxydable. Ils connaissent ces aciers alliés et peuvent garantir une fabrication et un contrôle de qualité adéquats. ISO 9001 et CE-PED certifié.
Cet alliage nécessite des procédures spécifiques. Une technique de soudage appropriée garantit l'intégrité de la soudure.
Il est coûteux, il est donc important d'évaluer si le produit a une durée de vie plus longue. Cela peut justifier son coût initial plus élevé.
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- RM901 No.22 Tangjiaqiao Road Wenzhou Chine
- +86 577 8551 1171
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- https://www.kaysuns.com/
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