Nickel Alloy 200 and Nickel Alloy 201 bars are commercially pure nickel bars used in chemical processing, alkali handling, electrical components, marine equipment, food processing, battery-related parts, and industrial corrosion-resistant applications. Nickel 200, also known as UNS N02200, is a commercially pure wrought nickel alloy with excellent corrosion resistance, good mechanical properties, and high thermal and electrical conductivity. Nickel 201, also known as UNS N02201, is the low-carbon version of Nickel 200 and is preferred when the bar will be used above about 315°C, because its lower carbon content helps reduce the risk of graphitization and carbon-related embrittlement. For buyers and engineers, Nickel Alloy 200 | 201 bar specifications should be reviewed from chemical composition, carbon content, mechanical properties, density, physical properties, corrosion resistance, high-temperature performance, bar form, standard, tolerance, surface condition, and final application requirements.
Nickel Alloy 200 and Nickel Alloy 201 bars are both commercially pure nickel materials. They are not nickel-chromium alloys like Inconel, and they are not nickel-copper alloys like Monel. Their main feature is very high nickel content, usually 99.0% minimum nickel plus cobalt, which gives them excellent resistance to many corrosive media, especially caustic alkalis and neutral or reducing environments.
Nickel 200 bar is generally selected for applications requiring good corrosion resistance, good ductility, good electrical conductivity, and good thermal conductivity at normal or moderate temperatures. Nickel 201 bar is selected when similar corrosion resistance is required but the working temperature is higher, especially where carbon control is important.
| Item | Nickel Alloy 200 Bar | Nickel Alloy 201 Bar |
|---|---|---|
| Common Name | Nickel 200 / Alloy 200 | Nickel 201 / Alloy 201 |
| UNS Number | UNS N02200 | UNS N02201 |
| W.Nr. | 2.4066 | 2.4068 |
| Material Type | Commercially pure wrought nickel | Low-carbon commercially pure wrought nickel |
| Main Difference | Higher permitted carbon content | Lower carbon content for higher-temperature service |
| Common Bar Forms | Round bar, flat bar, square bar, hex bar, forged bar | Round bar, flat bar, square bar, hex bar, forged bar |
Nickel Alloy 200 | 201 bar specifications are important because the wrong grade may cause performance problems. Nickel 200 and Nickel 201 may look almost identical in bar form, but their carbon content difference affects high-temperature service. For normal-temperature corrosion-resistant parts, Nickel 200 may be suitable. For higher-temperature alkali handling, furnace-related parts, or components exposed to elevated temperature, Nickel 201 is often a safer choice.
The main difference between Nickel Alloy 200 and Nickel Alloy 201 bars is carbon content. Nickel 201 is the low-carbon grade, while Nickel 200 allows higher carbon content. This difference may seem small on paper, but it can be important in high-temperature service.
Nickel 200 bar is a commercially pure nickel bar with excellent corrosion resistance, good mechanical properties, and high thermal and electrical conductivity. It is commonly used for chemical equipment, electrical components, battery parts, food processing equipment, caustic alkali systems, fasteners, shafts, fittings, and machined parts.
Nickel 200 is often selected when the application does not involve prolonged exposure to elevated temperatures where carbon-related problems may occur. For many room-temperature and moderate-temperature applications, Nickel 200 provides a strong balance of performance and availability.
Nickel 201 bar is the low-carbon version of Nickel 200. The lower carbon content improves performance in higher-temperature service by reducing the risk of graphitization and carbon-related embrittlement. Nickel 201 is often selected for applications above about 315°C, especially when corrosion resistance and ductility must be maintained.
Nickel 201 is widely used in caustic evaporators, high-temperature alkali handling equipment, furnace components, chemical processing parts, and applications where a low-carbon pure nickel bar is required by specification.
| Comparison Item | Nickel Alloy 200 Bar | Nickel Alloy 201 Bar |
|---|---|---|
| Main Grade Feature | Commercially pure nickel | Low-carbon commercially pure nickel |
| Carbon Content | Higher maximum carbon than Nickel 201 | Very low carbon content |
| High-Temperature Suitability | Better for normal and moderate temperature service | Better for higher-temperature service |
| Corrosion Resistance | Excellent in many reducing and alkaline environments | Similar corrosion resistance, with better carbon control at temperature |
| Typical Selection Logic | Choose for general pure nickel bar applications | Choose when low carbon or elevated temperature performance is required |
The chemical composition of Nickel Alloy 200 and Nickel Alloy 201 bars is very close. Both grades are based on very high nickel content. The most important composition difference is carbon. Nickel 201 has a much lower carbon limit than Nickel 200.
Because these alloys are commercially pure nickel, buyers should pay attention to nickel content, carbon content, iron, manganese, copper, silicon, sulfur, and other controlled elements. These small elements may affect corrosion resistance, processing behavior, weldability, and high-temperature service reliability.
| Element | Nickel Alloy 200 Typical Range | Nickel Alloy 201 Typical Range | Practical Meaning |
|---|---|---|---|
| Nickel + Cobalt | 99.0% min | 99.0% min | Main base element, responsible for pure nickel performance |
| Carbon | 0.15% max | 0.02% max | Key difference between Nickel 200 and Nickel 201 |
| Copper | 0.25% max | 0.25% max | Controlled residual element |
| Iron | 0.40% max | 0.40% max | Controlled residual element affecting alloy balance |
| Manganese | 0.35% max | 0.35% max | Controlled element for metallurgical quality |
| Silicon | 0.35% max | 0.35% max | Controlled residual and deoxidation-related element |
| Sulfur | 0.01% max | 0.01% max | Kept low to maintain processing quality |
When purchasing Nickel 200 or Nickel 201 bar, the chemical composition should be checked through the material test certificate. The MTC should clearly show the grade, UNS number, heat number, standard, and actual tested chemical values. For elevated-temperature service, carbon content should be reviewed carefully because this is the main reason to choose Nickel 201 instead of Nickel 200.
The carbon content difference is the most important technical point when comparing Nickel Alloy 200 and Nickel Alloy 201 bars. Nickel 200 allows higher carbon content, while Nickel 201 is designed with very low carbon content. This difference affects high-temperature performance, especially when the material is exposed to elevated temperature for long periods.
Nickel 200 has a higher maximum carbon limit. For many normal-temperature and moderate-temperature applications, this is not a problem. Nickel 200 still provides excellent corrosion resistance, good ductility, and good mechanical properties. It is widely used in chemical processing, electrical, food processing, and industrial corrosion-resistant components.
Nickel 201 has a very low carbon limit. This low-carbon design is important for applications above about 315°C. At elevated temperature, higher carbon in commercially pure nickel can increase the risk of graphitization and embrittlement. Nickel 201 reduces this risk and is therefore preferred for high-temperature applications.
If the bar will be used below moderate temperatures and the project does not require low carbon, Nickel 200 may be suitable. If the bar will be used above about 315°C, or if the drawing or specification requires low-carbon pure nickel, Nickel 201 should be selected. This is one of the clearest selection rules in Nickel Alloy 200 | 201 bar specifications.
| Carbon-Related Item | Nickel 200 | Nickel 201 |
|---|---|---|
| Carbon Limit | Higher maximum carbon | Very low carbon |
| Best Temperature Range | Normal and moderate temperature applications | Higher-temperature applications |
| Main Risk Controlled | Not mainly designed for carbon-sensitive high-temperature service | Reduces graphitization and embrittlement risk |
| Typical Buying Reason | General commercially pure nickel bar | Low-carbon pure nickel bar for elevated temperature |
Nickel Alloy 200 and Nickel Alloy 201 bars have good mechanical properties, including good ductility, toughness, and formability. Mechanical properties depend on bar size, production method, heat treatment condition, cold work level, and applicable standard. Hot rolled, forged, annealed, cold drawn, and ground bars may have different strength and hardness values.
Nickel 200 and Nickel 201 are not selected as high-strength nickel alloys in the same way as precipitation-hardened alloys. Their advantage is the combination of corrosion resistance, ductility, conductivity, and processability. For shafts, rods, fasteners, fittings, electrical parts, and chemical equipment components, their mechanical properties are usually sufficient when the design is correct.
| Property | Nickel 200 Bar | Nickel 201 Bar | Notes |
|---|---|---|---|
| Tensile Strength | Good, varies by condition | Good, varies by condition | Cold drawn bars usually have higher strength than annealed bars |
| Yield Strength | Moderate | Moderate | Depends strongly on cold work and product form |
| Elongation | High ductility | High ductility | Useful for forming, bending, and fabrication |
| Hardness | Low to moderate depending on condition | Low to moderate depending on condition | Important for machining and wear-related applications |
| Toughness | Good | Good | Suitable for many industrial components |
Annealed Nickel 200 and Nickel 201 bars usually provide better ductility and easier fabrication. Cold drawn bars usually provide better dimensional accuracy, smoother surface, and higher strength due to cold work. If the final component is a precision rod, pin, shaft, or electrical part, cold drawn or ground bar may be preferred. If the component needs forming or welding, annealed material may be more suitable.
Nickel Alloy 200 and Nickel Alloy 201 bars have similar physical properties because both grades are commercially pure nickel. Their high nickel content provides good thermal conductivity, good electrical conductivity, and stable physical behavior. These properties make them useful in electrical, thermal, chemical, and industrial processing applications.
The density of Nickel Alloy 200 and Nickel Alloy 201 is commonly around 8.89 g/cm³. This density is useful for calculating bar weight, shipping weight, machining blank weight, and project material cost. For round bar stock, buyers often calculate weight based on diameter, length, and density before confirming quantity and freight.
| Physical Property | Nickel Alloy 200 | Nickel Alloy 201 | Practical Meaning |
|---|---|---|---|
| Density | About 8.89 g/cm³ | About 8.89 g/cm³ | Used for weight and cost calculation |
| Melting Range | About 1435-1446°C | About 1435-1446°C | Useful for thermal processing reference |
| Electrical Conductivity | High compared with many nickel alloys | High compared with many nickel alloys | Useful for electrical and battery-related parts |
| Thermal Conductivity | Good | Good | Useful for heat transfer and thermal components |
| Magnetic Behavior | Ferromagnetic at room temperature | Ferromagnetic at room temperature | May matter for electrical or instrument applications |
Density is important because Nickel 200 and Nickel 201 bars are often sold by weight. A small change in diameter or length can significantly affect total weight, especially for large round bars and long pieces. When requesting a quotation, buyers should provide diameter, length, quantity, and whether cutting service is required.
Nickel Alloy 200 and Nickel Alloy 201 bars have excellent corrosion resistance in many environments, especially caustic alkalis, neutral salts, dry fluorine, and many reducing conditions. Their commercially pure nickel composition makes them useful for chemical processing and alkali handling equipment.
One of the most important advantages of Nickel 200 and Nickel 201 is their strong resistance to caustic alkalis. These alloys are often used in caustic soda production, alkali evaporation equipment, chemical handling systems, and related components. Nickel 201 is often preferred if the alkali environment involves elevated temperature.
Nickel 200 and Nickel 201 bars perform well in many reducing and neutral environments. They can resist many non-oxidizing salts and alkaline solutions. This makes them useful for chemical processing, food processing, and industrial equipment where purity and corrosion resistance are important.
Nickel 200 and Nickel 201 are not the best choices for strong oxidizing environments. Because they do not contain chromium like stainless steel or Inconel alloys, their resistance to oxidizing acids and high-temperature oxidation is more limited. For strong oxidizing acids, chloride pitting conditions, or severe mixed chemical environments, other nickel alloys may be more suitable.
| Environment | Nickel 200 Performance | Nickel 201 Performance | Selection Note |
|---|---|---|---|
| Caustic Alkali | Excellent | Excellent, especially at higher temperature | One of the strongest application areas |
| Neutral Salt Solutions | Good | Good | Actual performance depends on impurities and temperature |
| Reducing Media | Good | Good | Suitable for many non-oxidizing conditions |
| Strong Oxidizing Acids | Limited | Limited | Other alloys may be better |
| High-Temperature Oxidation | Limited compared with nickel-chromium alloys | Better carbon control, but still not a nickel-chromium oxidation alloy | Inconel alloys may be more suitable |
High-temperature performance is one of the most important reasons to distinguish Nickel 200 from Nickel 201. Although both materials are commercially pure nickel, Nickel 201 is usually preferred for service above about 315°C because of its lower carbon content.
Nickel 200 can be used in many moderate-temperature applications, but it is not usually recommended for prolonged service above about 315°C when carbon-related graphitization may become a concern. If the working condition includes elevated temperature for long periods, the buyer should carefully review whether Nickel 201 is required.
Nickel 201 is designed for better high-temperature reliability because of its low carbon content. It is often selected for caustic alkali equipment, chemical processing parts, furnace-related components, and other applications where pure nickel corrosion resistance is needed at elevated temperature.
| Service Condition | Recommended Grade | Reason |
|---|---|---|
| Room temperature corrosion-resistant parts | Nickel 200 or Nickel 201 | Both may be suitable depending on specification and availability |
| Moderate-temperature chemical equipment | Nickel 200 or Nickel 201 | Final choice depends on exact temperature and project requirement |
| Service above about 315°C | Nickel 201 | Low carbon content helps reduce graphitization risk |
| High-temperature caustic alkali service | Nickel 201 | Better choice for elevated-temperature pure nickel service |
| High-temperature oxidizing gas | Usually not Nickel 200 or 201 | Nickel-chromium alloys may be more suitable |
Nickel Alloy 200 and Nickel Alloy 201 bars can be supplied in several bar forms. The right form depends on machining method, final component shape, tolerance requirement, production efficiency, and cost.
Round bar is the most common form. It is used for shafts, pins, rods, fasteners, valve parts, fittings, bushings, electrical contacts, and machined components. Round bars may be supplied as hot rolled, forged, cold drawn, peeled, polished, or centerless ground material.
Flat bar is used for brackets, strips, electrical connectors, bus bars, spacers, supports, and fabricated components. For electrical applications, surface condition and dimensional tolerance may be important.
Square bar is used for machined blocks, fittings, support parts, and custom components. It can reduce machining waste when the final part has a square or rectangular profile.
Hex bar is commonly used for nuts, fittings, threaded parts, and fastener components. Hex bar helps reduce machining time because the hexagonal shape is already close to the finished part geometry.
| Bar Form | Typical Uses | Selection Advantage |
|---|---|---|
| Round Bar | Shafts, rods, pins, fasteners, valve parts, fittings | Most common and versatile bar form |
| Flat Bar | Bus bars, brackets, strips, supports, fabricated parts | Good for rectangular components and electrical parts |
| Square Bar | Machined blocks, fittings, structural small parts | Reduces machining waste for square components |
| Hex Bar | Nuts, fittings, fastener parts, threaded components | Efficient for hexagonal machined parts |
Nickel Alloy 200 | 201 bars are usually supplied according to recognized nickel material standards. Standards help define chemical composition, mechanical properties, product form, testing, tolerance, marking, certification, and acceptance requirements.
One of the common specifications for Nickel 200 and Nickel 201 rod and bar products is ASTM B160. ASME SB-160 may also be used for pressure-related or engineering applications. Buyers may also specify UNS N02200 for Nickel 200 and UNS N02201 for Nickel 201 to avoid grade confusion.
| Standard / Designation | Nickel 200 | Nickel 201 | Meaning |
|---|---|---|---|
| UNS Number | UNS N02200 | UNS N02201 | Unified material designation |
| ASTM B160 | Applicable | Applicable | Common specification for nickel rod and bar |
| ASME SB-160 | Applicable | Applicable | Often used for ASME-related projects |
| W.Nr. | 2.4066 | 2.4068 | European material number reference |
| Customer Specification | May apply | May apply | May include extra testing, tolerance, or documentation |
A complete inquiry for Nickel Alloy 200 | 201 bar should include grade, UNS number, standard, bar form, diameter or size, length, quantity, surface condition, tolerance, delivery condition, testing requirement, certificate requirement, and destination if freight is needed. Clear specifications help reduce mistakes and make quotation faster.
Nickel Alloy 200 and Nickel Alloy 201 bars can be supplied in many sizes depending on stock availability and production capability. Round bars are commonly ordered by diameter and length, while flat, square, and hex bars require width, thickness, across-flat dimension, or customized size details.
Nickel 200 and Nickel 201 round bars may be supplied from small diameters for fasteners and electrical parts to large diameters for heavy machined components. Common sizes may include 6 mm, 8 mm, 10 mm, 12 mm, 16 mm, 20 mm, 25 mm, 30 mm, 40 mm, 50 mm, 60 mm, 80 mm, 100 mm, and larger forged sizes.
Bars may be supplied in random length, fixed length, or cut-to-size length. For export and machining orders, buyers often request fixed pieces according to final machining blanks. Cutting allowance should be considered because saw cutting may require facing or end machining.
Surface condition affects appearance, machining allowance, corrosion performance, and final cost. Hot rolled or black surface bars are often economical for general machining. Peeled or polished bars provide cleaner surface quality. Centerless ground bars offer better tolerance and surface finish for precision applications.
| Surface Condition | Main Feature | Typical Use |
|---|---|---|
| Hot Rolled / Black Surface | Economical, may require machining or cleaning | General industrial machining |
| Forged Surface | Suitable for large bars and heavy sections | Large machined parts and heavy-duty components |
| Peeled Bar | Cleaner surface and reduced machining allowance | Shafts, rods, machined parts |
| Cold Drawn Bar | Better tolerance and higher strength | Small diameter precision parts and fasteners |
| Centerless Ground Bar | Tight tolerance and smooth finish | Precision shafts, rods, electrical components |
Tolerance should be selected according to final use. If the bar will be heavily machined, standard tolerance may be enough. If the bar will be used as a precision rod or near-net-size component, tighter tolerance may reduce machining cost. For shafts and electrical parts, straightness and surface finish may also be important.
Nickel Alloy 200 and Nickel Alloy 201 bars are used in applications requiring commercially pure nickel properties. Their corrosion resistance, conductivity, ductility, and purity make them useful in chemical, electrical, marine, food, battery, and industrial processing fields.
Nickel 200 and Nickel 201 bars are widely used for chemical processing components, especially where caustic alkali resistance is required. They may be machined into rods, shafts, valve parts, fittings, fasteners, and support components for alkali handling equipment.
Pure nickel materials are commonly used in caustic soda production and alkali processing. Nickel 201 is often preferred when the alkali environment includes elevated temperature. Typical components include evaporator parts, heaters, rods, fasteners, support bars, and machined fittings.
Because Nickel 200 and Nickel 201 have good electrical conductivity compared with many nickel alloys, they are used for electrical contacts, terminals, conductive rods, battery parts, connectors, and electronic industrial components. Surface quality and dimensional accuracy may be especially important in these applications.
Nickel bars may be used in selected food processing and industrial processing equipment where corrosion resistance and cleanliness are required. Material surface condition and cleaning procedure should be controlled according to the application.
Nickel 200 and Nickel 201 are used in selected marine and salt-related environments, especially where reducing or alkaline conditions are present. For severe seawater shaft applications, Monel 400 may sometimes be more suitable, but Nickel 200 and 201 remain useful in many corrosion-resistant industrial parts.
| Industry | Typical Nickel 200 201 Bar Components | Reason for Use |
|---|---|---|
| Chemical Processing | Valve parts, rods, fittings, fasteners, support bars | Good resistance to many reducing and alkaline media |
| Caustic Alkali | Evaporator parts, heater components, rods, fixtures | Excellent caustic alkali resistance |
| Electrical | Contacts, terminals, conductive rods, connectors | Good electrical and thermal conductivity |
| Battery Industry | Battery tabs, connectors, conductive parts | Pure nickel properties and conductivity |
| Industrial Equipment | Machined parts, pins, shafts, spacers, supports | Corrosion resistance and ductility |
For normal-temperature chemical, electrical, and industrial applications, Nickel 200 is often suitable. For elevated-temperature service, especially above about 315°C, Nickel 201 is usually preferred because of its low carbon content. If the purchase specification already states UNS N02201, Nickel 201 should be supplied instead of Nickel 200.
What is the difference between Nickel 200 and Nickel 201?
The main difference between Nickel 200 and Nickel 201 is carbon content. Nickel 200 is a commercially pure nickel alloy with a higher permitted carbon content, while Nickel 201 is the low-carbon version. Nickel 201 is preferred for service above about 315°C because its low carbon content helps reduce the risk of graphitization and carbon-related embrittlement. For normal-temperature applications, Nickel 200 may be suitable if the specification allows it.
What is Nickel 200 bar used for?
Nickel 200 bar is used for chemical processing parts, caustic alkali equipment, electrical contacts, conductive rods, battery components, fasteners, fittings, valve parts, shafts, and industrial corrosion-resistant components. It is selected when commercially pure nickel properties, good corrosion resistance, ductility, and high thermal or electrical conductivity are required.
What is the density of Nickel 200 and Nickel 201?
The density of Nickel 200 and Nickel 201 is commonly about 8.89 g/cm³. This value is useful for calculating the weight of round bars, flat bars, square bars, hex bars, and cut-to-size pieces. Since nickel bars are often sold by weight, density is important for quotation, shipping cost, machining blank planning, and project material calculation.
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