Hastelloy C-276 (UNS N10276) Supplier | Bar, Tube, Plate - Hangbo Alloy
Date: 2024年11月18日 Categories: All Products、Hastelloy Views: 2729
Excerpt:
Hastelloy C-276 (UNS N10276) supplier — ASTM B574/B575/B619/B622. The gold standard for corrosion resistance in aggressive chemicals, wet chlorine, and mixed acid environments.
Hangbo Alloy Group offers a diverse range of materials, including round bars, steel plates, strips, seamless pipes, forged products, and wire. Below is a detailed overview of HASTELLOY C-276:
Detailed Introduction to Hastelloy C-276
Hastelloy C-276 (UNS N10276) is a nickel-molybdenum-chromium superalloy that exhibits exceptional corrosion resistance and is ideal for harsh environments. It is particularly well-suited for applications that involve exposure to a variety of corrosive media, including acids, saltwater, and industrial chemicals.
This alloy maintains its mechanical properties at high temperatures and is renowned for its ability to resist pitting, crevice corrosion, and stress corrosion cracking. Its unique composition ensures durability and reliability across many applications.
Key Standards: ASTM B574 (Bar/Forgings), ASTM B575 (Plate/Sheet), ASTM B619/B622 (Pipe/Tube), DIN 2.4819.
Chemical Composition of Hastelloy C-276 (ASTM B574 / UNS N10276)
| Element | Content (%) |
|---|---|
| Nickel (Ni) | Remainder |
| Molybdenum (Mo) | 15.0 - 17.0 |
| Chromium (Cr) | 14.5 - 16.5 |
| Iron (Fe) | 4.0 - 7.0 |
| Tungsten (W) | 3.0 - 4.5 |
| Cobalt (Co) | 2.5 max |
| Carbon (C) | 0.010 max |
| Manganese (Mn) | 1.0 max |
| Vanadium (V) | 0.35 max |
| Phosphorus (P) | 0.04 max |
| Sulfur (S) | 0.03 max |
| Silicon (Si) | 0.08 max |
Mechanical Properties (ASTM B574 / B575)
| Property | Value (Min) |
|---|---|
| Tensile Strength | 690 MPa (100 ksi) |
| Yield Strength (0.2% Offset) | 283 MPa (41 ksi) |
| Elongation | 40% |
| Hardness (Rockwell B) | 100 HRB max |
Material Characteristics
- Exceptional Corrosion Resistance: Excellent resistance to a wide range of chemical process environments, including strong oxidizers (ferric and cupric chlorides), hot contaminated media (organic and inorganic), chlorine, formic and acetic acids, acetic anhydride, and seawater and brine solutions.
- Pitting and Crevice Corrosion Resistance: One of the few materials that can withstand the corrosive effects of wet chlorine gas, hypochlorite, and chlorine dioxide.
- Low Carbon Content: Minimizes grain-boundary carbide precipitation during welding to maintain corrosion resistance in as-welded structures.
- Versatility: Suitable for most chemical process applications in the as-welded condition.
Common Applications of Hastelloy C-276
- Chemical Processing: Reactors, heat exchangers, evaporators, and piping systems handling highly corrosive media.
- Pollution Control: Flue gas desulfurization (FGD) systems, scrubbers, and ducting.
- Oil and Gas: Sour gas equipment and downhole components.
- Waste Treatment: Hazardous waste incineration and municipal waste processing.
- Pulp and Paper: Bleach plants and digesters.
Pros & Cons of Alloy C-276
| Pros | Cons |
|---|---|
| Outstanding resistance to localized corrosion (pitting/crevice). | High material cost due to nickel, molybdenum, and tungsten content. |
| Excellent weldability without loss of corrosion resistance. | Work hardens quickly, requiring specialized machining tools. |
| Maintains integrity in both oxidizing and reducing environments. | Not recommended for highly oxidizing hot concentrated nitric acid. |
Frequently Asked Questions (FAQ)
4. How does Hastelloy C-276 perform in wet chlorine environments?
Hastelloy C-276 is one of the very few alloys that can withstand the highly corrosive effects of wet chlorine gas, as well as hypochlorite and chlorine dioxide solutions. Its unique molybdenum and chromium balance prevents localized attack in these aggressive media.
5. What are the typical machining challenges for Hastelloy C-276?
Like most nickel-based alloys, C-276 work hardens rapidly. Successful machining requires heavy-duty equipment, sharp tools, slow speeds, and high feed rates. Rigid setups and sufficient cooling are essential to prevent tool wear and maintain surface integrity.
1. Is Hastelloy C-276 better than Stainless Steel 316?
Yes, for highly corrosive environments involving chlorides, acids, and high temperatures. C-276 offers far superior resistance to pitting and stress corrosion cracking compared to 316.
2. Can Hastelloy C-276 be welded?
Absolutely. It is designed to be easily welded by all common welding processes. Its low carbon content helps prevent sensitization and intergranular corrosion in the heat-affected zone.
3. What are the main differences between C-276 and C-22?
Hastelloy C-22 contains slightly more chromium than C-276, providing better resistance to oxidizing media, while C-276 has higher molybdenum, offering better resistance in reducing environments.
Internal Links:
Explore more high-performance alloys:
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Production Process
Our material is manufactured using VIM (Vacuum Induction Melting) + VAR (Vacuum Arc Remelting) or ESR (Electroslag Refining) processes to ensure ultra-high purity and metallurgical integrity. The material undergoes precision machining and rigorous heat treatment (Solution Annealing/Aging) to achieve the specified mechanical properties and grain size consistency.
Testing & Inspection
To guarantee zero-defect delivery, all batches undergo comprehensive testing:
- UT/PT Flaw Detection: Ultrasonic and Penetrant testing to identify surface and internal defects.
- Mechanical Testing: High and low temperature tensile testing, impact testing, and hardness verification.
- Corrosion Testing: Intergranular corrosion tests and pitting resistance verification according to ASTM standards.
Quality Control
We implement a total quality management system with full-process traceability from raw material to finished product. All products are manufactured in strict compliance with ASTM, ASME, and AMS standards, accompanied by EN 10204 3.1/3.2 certificates.
Market Pain Points & Solutions
- Delivery Consistency: We address supply chain delays by maintaining a large inventory of raw billets and semi-finished products, ensuring rapid response times.
- Extreme Environment Tolerance: Our specialized melting processes ensure that our alloys maintain structural stability in highly corrosive and high-pressure environments where standard materials fail.
Deep Application Insights
- Petrochemical: Used in flare stacks and flare tips where resistance to high temperatures and sour gas corrosion is critical.
- Nuclear Power: Applied in reactor core components and control rod mechanisms due to its excellent radiation resistance and mechanical stability.
- Aerospace: Found in engine exhaust systems and turbine shroud rings where high fatigue strength and oxidation resistance are required.
Product Forms & Standards Comparison
| Product Form | Main ASTM Standard | Dimensions Range |
|---|---|---|
| Round Bar | ASTM B574 | Φ6mm - Φ500mm |
| Seamless Tube | ASTM B622 | OD 6mm - 219mm |
| Plate/Sheet | ASTM B575 | T 0.5mm - 50mm |
| Forgings | ASTM B564 | Custom Drawings |
Frequently Asked Questions (FAQ)
Q: What makes Hastelloy C-276 the best choice for aggressive environments?
A: Its high molybdenum and chromium content provides exceptional resistance to both oxidizing and reducing media, including wet chlorine gas and ferric chloride.
Q: Can Hastelloy C-276 be used in seawater?
A: Yes, it is virtually immune to pitting and crevice corrosion in seawater and brine solutions.
Q: Is post-weld heat treatment necessary for C-276?
A: No, its low carbon content prevents sensitization, making it suitable for use in the as-welded condition.
Q: How does C-276 compare to Inconel 625?
A: While both are excellent, C-276 offers better resistance in highly reducing environments, whereas Inconel 625 is often preferred for high-temperature oxidation resistance.
Q: What industries rely on Hastelloy C-276?
A: Chemical processing, pollution control (FGD), waste treatment, and oil & gas (sour gas service).
