Proszek ze stopu niklu C276

Proszek stopu niklu C276, znany również jako proszek Hastelloy C276, to proszek stopu niklowo-molibdenowo-chromowego o wysokiej odporności na korozję. Ma doskonałą odporność na szeroki zakres środowisk korozyjnych, zwłaszcza na utlenianie i pękanie korozyjne naprężeniowe jonów chlorkowych.

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Przegląd

Proszek stopu niklu C276, znany również jako proszek Hastelloy C276, to proszek stopu niklowo-molibdenowo-chromowego o wysokiej odporności na korozję. Ma doskonałą odporność na szeroki zakres środowisk korozyjnych, zwłaszcza na utlenianie i pękanie korozyjne naprężeniowe jonów chlorkowych.

Some key properties and characteristics of Nickel Alloy C276 powder include:

Nickel Alloy C276 Powder Key Properties

Skład Nickel (Balance), Molybdenum (15-17%), Chromium (14.5-16.5%), Iron (4-7%), Tungsten (3-4.5%)
Gęstość 8.89 g/cm3
Temperatura topnienia 1390°C (2530°F)
Przewodność cieplna 11 W/m-K
Rezystywność elektryczna 1.24 microhm-cm
Odporność na utlenianie Excellent up to 1095°C
Odporność na korozję Extremely high in wide range of environments
Key Attributes High strength, good fabricability, outstanding corrosion resistance

Nickel Alloy C276 powder can be used to manufacture parts using additive manufacturing techniques like selective laser sintering (SLS), direct metal laser sintering (DMLS), laser powder bed fusion (L-PBF) and binder jetting. This allows complex geometries to be created with very good mechanical properties.

Some of the key applications and uses of Nickel Alloy C276 powder include:

Applications of Nickel Alloy C276 Powder

Oil & Gas Industry Wellhead valves, Christmas trees, flowlines, subsea components
Przemysł chemiczny Pumps, valves, reaction vessels, heat exchangers
Kontrola zanieczyszczeń Scrubbers, precipitators, stacks, ducts, fans
Pharmaceutical Industry Reactor vessels, containers, valves, pipework
Przemysł przetwórstwa spożywczego Tanks, valves, pipework, conveyors, nuts and bolts
Zastosowania morskie Propeller shafts, corrosion-resistant fasteners, water-cooled exhaust manifolds
Przemysł lotniczy Engine mounts, exhaust nozzle guides, thrust reverser systems, nacelle components

Skład

The typical composition of Nickel Alloy C276 powder is:

Typical Composition of Nickel Alloy C276 Powder

Element Waga %
Nikiel (Ni) Równowaga
Molibden (Mo) 15-17%
Chrom (Cr) 14.5-16.5%
Żelazo (Fe) 4-7%
Wolfram (W) 3-4.5%
Mangan (Mn) 1% max
Krzem (Si) 0.5% max
Fosfor (P) 0.02% max
Siarka (S) 0.03% max
Węgiel (C) 0.01% max

The high nickel and molybdenum content gives Nickel Alloy C276 excellent corrosion resistance. The chromium helps provide oxidation resistance. Trace elements like manganese, silicon, phosphorus and sulfur are minimized as they can negatively impact corrosion resistance if present in higher amounts. The low carbon content minimizes carbide precipitation.

Właściwości i charakterystyka

Nickel Alloy C276 powder has the following key properties and characteristics:

Properties of Nickel Alloy C276 Powder

Gęstość 8.89 g/cm3
Zakres topnienia 1315-1390°C (2400-2530°F)
Przewodność cieplna 11 W/m-K (~64 Btu-in/ft2-h-°F)
Rezystywność elektryczna 1.24 microhm-cm at 20°C
Moduł sprężystości 205 GPa
Współczynnik Poissona 0.29
Wytrzymałość na rozciąganie 515-750 MPa (75-110 ksi)
Granica plastyczności (przesunięcie 0,2%) 205-515 MPa (30-75 ksi)
Wydłużenie 25-45%
Twardość 25-35 HRC
Odporność na utlenianie Resistant up to 1095°C
Współczynnik rozszerzalności cieplnej 13 μm/m-°C
Obróbka cieplna Solution treated and rapid quenched

Some key features and advantages of Nickel Alloy C276 powder include:

  • Extremely high corrosion resistance especially to pitting and crevice corrosion
  • Excellent resistance to oxidation and other high temperature effects up to ~1100°C
  • High strength from ambient up to elevated temperatures
  • Dobra spawalność przy użyciu konwencjonalnych metod spawania
  • Good formability allowing a range of fabrication options
  • Higher strength compared to other nickel alloys
  • Lower carbon content improves corrosion resistance

Specyfikacje

Nickel Alloy C276 powder is available in various size ranges depending on the application and manufacturing process to be used. Some typical size specifications include:

Typical Size Specifications of Nickel Alloy C276 Powder

Wielkość cząstek 15-45 μm
Gęstość pozorna ~2,5 g/cm3
Przepływ ~25 s/50g
Rozkład wielkości D10: 20 μm; D50: 35 μm; D90: 40 μm

Larger powder sizes may be available up to 140 mesh size (~100 μm). Smaller powder is also produced down to nano powder size (~50 nm) for advanced applications.

Various national and international specifications apply to Nickel Alloy C276 powder based on composition, condition and testing:

  • AMS 5874 – Wrought Nickel Alloy C276 for General Purposes
  • ASME SB-574 – Wrought Nickel Alloy C276 for Pressure Vessels
  • ASTM B575 – Standard Specification for Low-Carbon Nickel Alloy Plate, Sheet, and Strip
  • ISO 15156/NACE MR0175/MR0103 – Petroleum and natural gas industries

Dostawcy i ceny

Some leading global suppliers of Nickel Alloy C276 powder include:

Key Suppliers of Nickel Alloy C276 Powder

Dostawca Lokalizacja
Sandvik Szwecja
Praxair USA
Technologia Carpenter USA
Hoganas Szwecja
Technologia LPW WIELKA BRYTANIA
TLS Technik Niemcy

Nickel Alloy C276 powder is more expensive than nickel-based superalloys due to the high molybdenum content. Cost also depends significantly on order volume and particle size distribution. Some approximate powder pricing is:

  • Small volumes (<100 kg) – $100-150 per kg
  • Large volumes (>1,000 kg) – $50-90 per kg

How to Choose Nickel Alloy C276 Powder

There are a few key factors to consider when selecting Nickel Alloy C276 powder:

Key Selection Criteria for Nickel Alloy C276 Powder

Parametr Szczegóły
Proces produkcji Match powder size and shape to requirements of additive or other process
Part Properties Strength, corrosion resistance, high temperature resistance needs
Operating Conditions Temperature, pressure, media to confirm adequate performance
Standardy branżowe Compliance for applications in oil & gas, chemical, food processing etc
Geometria części Complexity, surface finish, precision requirements
Testing and Certification Confirm composition, lack of contamination, lot test reports
Cena Balance performance needs with budget constraints

It is critical to start by understanding the application, operating conditions and properties needed. The manufacturing process determines suitable powder characteristics like particle size distribution, morphology and flowability. Chemical composition should be confirmed with the supplier’s certificate of analysis. Sample testing can validate key properties before full-scale production.

Aplikacje i przypadki użycia

Nickel Alloy C276 finds widespread use in demanding heat and corrosion environments across various industries:

Industries and Applications for Nickel Alloy C276 Powder

Przemysł Components and Parts
Ropa i gaz Wellhead valves, subsea flowlines, connectors, offshore rigs
Petrochemia Heat exchangers, condensers, process vessels
Marine Shafts, propellers, fasteners, exhaust components
Kontrola zanieczyszczeń Scrubber internals, fans, ducts, stacks
Przetwarzanie żywności Tanks, pipework, valves, nuts/bolts

Niektóre konkretne przykłady zastosowań obejmują:

  • Oil platforms – Seawater lift pumps, piping systems, wellhead Christmas trees, subsea components like connectors, flowlines, jumpers etc.
  • Petrochemical plants – Heat exchanger tubing, condenser tubes, process vessels and tanks, pipes and valves carrying corrosive media
  • Marine vessels – Components like propeller shafts, water-cooled exhaust manifolds, corrosion-resistant fasteners
  • Desalination – Intake screens, high pressure pump components and plungers, reverse osmosis membrane housings
  • Pollution control systems – FGD and SCR system internals like fans, ducts, stacks, scrubber liners exposed to acidic gases or seawater
  • Food/beverage processing – Pipework, process vessels and tanks, nuts/bolts, valves carrying acidic foods

Some typical components manufactured in Nickel Alloy C276 powder include:

Typical Components Using Nickel Alloy C276 Powder

Komponenty Descriptions
Pompy Centrifugal, positive displacement pumps for corrosive liquids
Impellers For process handling highly acidic or saline solutions
Zawory Gate, ball, butterfly, globe valves in piping systems
Dysze Spray nozzles for pollution control scrubbers
Reaction Vessels For chemical synthesis reactors under high temperature and pressure
Heat Exchanger Tubes Straight tubes or complex serpentine geometries
Pipe Fittings Elbows, tees, reducers conveying various corrosive media

Nickel Alloy C276 Powder vs Alternatives

Nickel Alloy C276 is compared below with key alternative nickel and stainless-steel alloys:

Comparison of Nickel Alloy C276 Powder with Alternatives

Stop Odporność na korozję Odporność na temperaturę Koszt Produkcja
Nickel Alloy C276 Bardzo wysoka Excellent to 1100°C Wysoki Good machinability/weldability
Alloy C22 Bardzo dobry Very Good to ~1200°C Wysoki Weldable
Stop 625 Wysoki Doskonała do 1000°C Średni Łatwa produkcja
316/316L Stainless Steel Umiarkowany Fair up to 300°C Niski Most readily fabricated
Duplex Stainless Doskonały Limited to 250°C Niski More difficult fabrication

Nickel Alloy C276 provides the best corrosion resistance across a wide range of aggressive environments compared to alternatives. It can reliably perform at high operating temperatures exceeding 1000°C. These benefits do come at a higher cost due to its specialized composition rich in strategic alloys. However, its ease of fabrication using standard methods provides a cost advantage over other more complex, proprietary alloys.

Limitations of Nickel Alloy C276

Despite its high performance, Nickel Alloy C276 does have some limitations to consider:

Limitations of Nickel Alloy C276 Powder

Ograniczenie Opis
Koszt More expensive than stainless steels due to nickel and molybdenum content
Produkcja Heavier sections over 50mm can show lower corrosion resistance
Grubość sekcji Maximum recommended section is 25mm for optimum performance
Thermal Processing Special control of heating/cooling cycles needed to avoid impairing properties

Thinner sections up to 25mm maintain consistently high corrosion resistance throughout. Care must also be taken to properly solution treat and quench finished parts to achieve full corrosion resistance without precipitation of deleterious phases. Overall though, Nickel Alloy C276 is engineered to be quite forgiving to fabricate relative to other highly alloyed materials.

FAQ

FAQ about Nickel Alloy C276 Powder

Pytanie Odpowiedź
What industries use Nickel Alloy C276? Petrochemical, oil & gas, marine applications, chemical processing, pollution control, desalination
Why is C276 better than stainless steel? Far higher corrosion resistance, performs well at much higher temperatures
What is Nickel Alloy C276 used for? Pipes, valves, pumps, heat exchangers, fasteners – wetted parts in contact with aggressive chemicals/fluids
What is the corrosion resistance of C276? Extremely high resistance to pitting, crevice corrosion, stress corrosion cracking across range of acids, chlorides etc
Can you weld Nickel Alloy C276? Yes, C276 offers excellent weldability using a range of welding processes
What alloy is similar to C276? Alloy C22 offers comparable corrosion resistance but lower fabricability
Is Hastelloy C276 expensive? Yes, it costs more than stainless steel due to nickel/molybdenum but offers superior performance
Is Nickel Alloy C276 compatible with seawater? Yes, it has excellent resistance to saline environments making it ideal for marine applications

Wnioski

Nickel Alloy C276 powder provides outstanding corrosion and temperature resistance coupled with good fabrication characteristics. This makes it an excellent choice for manufacturing critical parts and components exposed to aggressive operating environments across oil & gas, chemical processing and other industries. It does come at a premium cost but offers long, reliable service life with lower maintenance demands compared to other alloys. With additive manufacturing, it enables high complexity parts with properties equaling or exceeding tradition manufacturing. For extreme chemical corrosion or high temperatures approaching 1100°C, Nickel Alloy C276 is an ideal alloy system.

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