Excerpt:
Hastelloy C-2000 (UNS N06200) supplier — broadest corrosion resistance across oxidizing and reducing environments. HF acid service, pharmaceutical manufacturing. ASTM B574/B575.
Grade & Introduction
Hastelloy C-2000 (UNS N06200 / W.Nr. 2.4675) is arguably the most versatile corrosion-resistant nickel-chromium-molybdenum alloy ever developed. By deliberately incorporating 1.6% Copper into the Ni-Cr-Mo matrix, C-2000 solves the historic industry trade-off between oxidizing and reducing media resistance. While C-276 excels in reducing acids and C-22 in oxidizing acids, C-2000 provides superior performance in both, making it the premier choice for multi-purpose chemical reactors and process equipment. Shanghai Hangbo Alloy Group is a leading supplier of Hastelloy C-2000, providing high-precision round bars, seamless tubes, and plates for the most aggressive industrial chemical environments.
Applicable Standards
Our Hastelloy C-2000 products are manufactured and certified to meet the highest global quality standards:
- ASTM B574 / ASME SB-574: Standard Specification for Low-Carbon Ni-Cr-Mo-Cu Alloy Rod
- ASTM B575 / ASME SB-575: Standard Specification for Low-Carbon Ni-Cr-Mo-Cu Alloy Plate, Sheet, and Strip
- ASTM B622 / ASME SB-622: Standard Specification for Seamless Nickel and Nickel-Cobalt Alloy Pipe and Tube
- ASTM B564 / ASME SB-564: Standard Specification for Nickel Alloy Forgings
- NACE MR0175 / ISO 15156: Materials for use in H2S-containing environments in oil and gas production
Chemical Composition
The unique addition of Copper, combined with high Chromium and Molybdenum, defines the exceptional versatility of C-2000.
| Element | Ni | Cr | Mo | Cu | Fe | Al | C |
|---|---|---|---|---|---|---|---|
| Min (%) | Bal. | 22.0 | 15.0 | 1.3 | -- | -- | -- |
| Max (%) | -- | 24.0 | 17.0 | 1.9 | 3.0 | 0.50 | 0.01 |
Mechanical & Physical Properties
Hastelloy C-2000 provides high strength and excellent ductility in the solution-annealed condition; typical/reference values:
| Tensile Strength (Min) | 690 MPa (100 ksi) |
| Yield Strength (0.2% Offset) | 310 MPa (45 ksi) |
| Elongation in 2 in (Min) | 45% |
| Density | 8.50 g/cm³ (0.307 lb/in³) |
| Melting Range | 1328 – 1358 °C |
| Hardness (Annealed) | ≤ 100 HRB |
Material Characteristics
- Universal Resistance: Exceptional resistance to both oxidizing media (like ferric ions and wet chlorine) and reducing media (like sulfuric and hydrochloric acids).
- Pitting & Crevice Protection: High Molybdenum and Chromium contents provide a high PREN (Pitting Resistance Equivalent Number), far exceeding 316L and Alloy 20.
- Stress Corrosion Cracking (SCC) Immunity: Like most high-nickel alloys, C-2000 is virtually immune to chloride-induced SCC.
- Outstanding Thermal Stability: Superior resistance to the formation of grain-boundary precipitates in the heat-affected zone, ensuring corrosion resistance in the as-welded condition.
Manufacturing / Processing
Hastelloy C-2000 at Shanghai Hangbo Alloy Group is produced via VIM + ESR refining to ensure ultra-low carbon and silicon levels, which are critical for preventing intergranular attack. The material is hot-worked and then solution annealed at approximately 1150°C (2100°F) followed by a rapid water quench. This process "locks" the alloying elements in solid solution, maximizing the material's corrosion-resistant potential.
Testing & Quality Control
Each order of C-2000 undergoes exhaustive verification to ensure it meets the "C-series" performance expectations:
- Corrosion Rate Testing: Verification in various acid concentrations according to ASTM G28 Method A or B.
- OES Chemical Analysis: Precise verification of Copper and Molybdenum levels for multi-media performance.
- 100% PMI: Positive Material Identification on every piece to ensure no grade mixing.
- Ultrasonic Inspection: Conducted per ASTM A388 to guarantee the absence of internal defects in forgings and thick plates.
Applications
- Multi-Purpose Chemical Plants: Reactors and piping handling varied and changing chemical batches.
- Sulfuric Acid Service: Heat exchangers and heaters where acid concentrations can vary between oxidizing and reducing.
- Hydrochloric Acid Processing: Piping and pumps in environments containing contaminated or wet HCl.
- Pharmaceutical Reactors: Glass-lined vessel replacements or internals requiring high-purity corrosion resistance.
Pros & Cons
| Pros | Cons |
|---|---|
| Highest versatility among all Hastelloy C-type alloys. | Significantly higher cost than standard stainless steels. |
| Eliminates the need for different alloys for oxidizing vs reducing media. | Requires specialized welding fillers (C-2000 filler) for optimal joints. |
| Excellent fabricability and weldability. | Availability of very large forged formats can be limited. |
6 Professional FAQs
Q1: Why is Copper added to Hastelloy C-2000?
A: Copper significantly improves resistance to reducing acids, particularly sulfuric acid, while the high Chromium maintains resistance to oxidizing media.
Q2: Can I use C-276 filler metal to weld C-2000?
A: It is technically possible, but it is highly recommended to use matching Hastelloy C-2000 filler wire (ERNiCrMo-17) to ensure the weld bead has the same broad-spectrum corrosion resistance as the base metal.
Q3: How does C-2000 compare to C-276 in sulfuric acid?
A: C-2000 generally outperforms C-276 in sulfuric acid across a wider range of concentrations and temperatures due to its Copper content.
Q4: Is C-2000 suitable for offshore oil and gas?
A: Yes, it is fully compliant with NACE MR0175 and is used for critical components in sour gas environments where high H2S and chlorides are present.
Q5: What is the maximum temperature for C-2000 service?
A: For corrosion-critical structural service, it is generally used up to 400°C (750°F), above which thermal stability may be compromised for some media.
Q6: Does Shanghai Hangbo supply C-2000 seamless pipe?
A: Yes, we provide seamless pipes per ASTM B622 in sizes up to 8" Sch 80, along with matching flanges and fittings.
Related Product Supply List
- Round Bars: Diameter 8mm – 300mm, solution annealed and ground.
- Seamless Tubes & Pipes: OD 6mm – 219mm, Wall 0.5mm – 20mm.
- Plates & Sheets: 0.5mm – 50mm thickness, custom cut-to-size.
- Forgings: Flanges, rings, and specialized blocks per drawings.
- Welding Consumables: ERNiCrMo-17 wire and electrodes for high-integrity joints.
