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Nickel Alloy 200 and 201 are highly pure nickel-based alloys known for their excellent corrosion resistance and outstanding mechanical properties. These alloys are widely used in piping systems where durability, high strength, and resistance to harsh environments are crucial. Nickel Alloy 200/201 pipe and fittings are designed to withstand oxidizing and reducing agents, making them suitable for chemical processing, marine, and industrial applications.
Nickel Alloy 200 primarily consists of over 99% nickel, with minor amounts of carbon, iron, and copper. Alloy 201 is a low-carbon version of Alloy 200, containing less than 0.015% carbon, which improves its resistance to intergranular corrosion after welding. This unique chemical composition ensures that both alloys offer excellent resistance to a wide range of chemicals, including caustic solutions, acids, and alkalis, while maintaining structural integrity over prolonged service periods.
Nickel Alloy 200 and 201 pipe fittings are high-purity nickel materials designed for exceptional corrosion resistance and high ductility. They are widely used in chemical processing, marine, petrochemical, and aerospace industries. These fittings are ideal for piping systems handling caustic solutions, acids, and other aggressive chemicals, providing long-term durability in harsh environments.
Nickel Alloy 200 contains a minimum of 99% nickel, while Alloy 201 has slightly reduced carbon content for improved fabrication properties. Both alloys may contain trace amounts of iron, copper, and manganese. The high nickel content ensures excellent resistance to oxidation, reducing environments, and a variety of chemicals.
Nickel Alloy 200/201 pipes and fittings exhibit high tensile strength, ductility, and toughness. They maintain excellent mechanical performance even at elevated temperatures up to 600°C (1112°F). The low work-hardening rate of these alloys allows for easy fabrication, bending, and welding without compromising durability. These properties make them an ideal choice for high-stress applications in chemical, power, and marine industries.
Due to their exceptional corrosion resistance, Nickel Alloy 200/201 pipe and fittings are widely used in chemical processing plants, desalination plants, heat exchangers, marine environments, and aerospace applications. They are particularly effective in handling sulfuric acid, hydrochloric acid, and caustic soda solutions. Their reliability in extreme conditions ensures safety and longevity of piping systems in critical industrial operations.
Nickel 200/201 pipe fittings exhibit tensile strength ranging from 275–550 MPa and yield strength between 125–380 MPa, depending on temper and processing. Elongation typically ranges from 30–60%, providing excellent ductility and toughness. This combination makes these fittings suitable for high-stress and high-pressure piping systems.
These alloys are highly resistant to a wide range of corrosive environments, including caustic alkalis, hydrochloric acid, and sulfuric acid at moderate temperatures. They also resist stress corrosion cracking and pitting in many chemical and marine applications, making them reliable for long-term service in aggressive environments.
Specification Table
| Specification | Details |
|---|---|
| Material Grades | Nickel Alloy 200 (UNS N02200), Nickel Alloy 201 (UNS N02201, low carbon) |
| Standards & Specifications | ASTM B161, ASTM B162, ASTM B564, ASME SB161 / SB162 / SB564 |
| Form | Pipes: Seamless, Welded Fittings: Elbows, Tees, Reducers, Couplings, Flanges |
| Dimensions & Sizes | Pipe Sizes: 1/2" to 24" (custom sizes available) Schedule: SCH 10, SCH 20, SCH 40, SCH 80, SCH 160 Fittings: ASME/ANSI B16.9, B16.11 |
| Temperature & Pressure Ratings | Maximum Service Temperature: Up to 600°C (1112°F) Pressure Rating: As per ASTM/ASME standards depending on schedule and size |
| Applications | Chemical & petrochemical processing, Marine & seawater systems, Heat exchangers & condensers, Food & beverage industry, Aerospace & high-temperature applications |
| Key Features | Excellent corrosion resistance, High tensile strength & ductility, Suitable for welding & fabrication, Alloy 201 provides enhanced intergranular corrosion resistance |
Chemical Composition (Typical ranges for SSS32760)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
| Element | Nickel Alloy 200 (%) | Nickel Alloy 201 (%) |
|---|---|---|
| Nickel (Ni) | ≥ 99.0 | ≥ 99.0 |
| Carbon (C) | ≤ 0.15 | ≤ 0.015 |
| Copper (Cu) | ≤ 0.35 | ≤ 0.35 |
| Iron (Fe) | ≤ 0.40 | ≤ 0.40 |
| Manganese (Mn) | ≤ 0.50 | ≤ 0.50 |
| Silicon (Si) | ≤ 0.50 | ≤ 0.50 |
| Sulfur (S) | ≤ 0.025 | ≤ 0.025 |
Mechanical Properties (Typical)
| Property | Nickel Alloy 200 | Nickel Alloy 201 |
|---|---|---|
| Tensile Strength (MPa) | 520 – 750 | 520 – 750 |
| Yield Strength (MPa) | 140 – 275 | 140 – 275 |
| Elongation (%) | 30 – 50 | 30 – 50 |
| Hardness (HRB) | 70 – 95 | 70 – 95 |
| Melting Point (°C) | 1455 | 1455 |
| Service Temperature (°C) | Up to 600 | Up to 600 |
Equivalent Grades
| Standard | Nickel Alloy 200 | Nickel Alloy 201 |
|---|---|---|
| UNS | N02200 | N02201 |
| ASTM / ASME | B161 / B162 / B564 | B161 / B162 / B564 |
| EN / DIN | 2.4066 | 2.4066 |
| JIS | NCF401 | NCF401 |
| Other | Ni 200 | Ni 201 (Low Carbon) |
Dimension & Weight Chart (Selected common sizes)
Below is a representative chart showing outside diameter, wall thickness, inside diameter, cross-sectional area of metal and calculated weight per metre (kg/m). Values are calculated using density = 7.93 g/cm³ and are for guidance — use actual MTC values for procurement & engineering.
| Nominal Pipe Size (inch) | Outer Diameter (mm) | Schedule | Wall Thickness (mm) | Weight per Meter (kg/m) |
|---|---|---|---|---|
| 1/2" | 21.3 | SCH 10 | 2.77 | 0.68 |
| 1/2" | 21.3 | SCH 40 | 2.87 | 0.70 |
| 1" | 33.4 | SCH 10 | 2.77 | 1.08 |
| 1" | 33.4 | SCH 40 | 3.38 | 1.32 |
| 2" | 60.3 | SCH 10 | 2.87 | 2.03 |
| 2" | 60.3 | SCH 40 | 3.91 | 2.74 |
| 4" | 114.3 | SCH 10 | 3.38 | 5.48 |
| 4" | 114.3 | SCH 40 | 6.02 | 9.70 |
| 6" | 168.3 | SCH 10 | 3.91 | 8.80 |
| 6" | 168.3 | SCH 40 | 7.11 | 15.70 |
Types Of Pipe Fittingss and Tubes
Tube Unions
Bite Type Tube Fittings
Stainless Steel Pipe Fittings
Forged Fsitting
Fitting
Carbon Steel Butt Weld Pipe Fittings
Frequently Asked Questions (FAQ)
What is Nickel Alloy 200?
Nickel Alloy 200 is a commercially pure nickel material known for excellent corrosion resistance in both oxidizing and reducing environments.
What is the difference between Alloy 200 and Alloy 201?
Alloy 201 is a low-carbon variant of Alloy 200, offering enhanced resistance to intergranular corrosion, especially after welding.
What are the common applications of Nickel Alloy 200/201?
They are widely used in chemical processing, marine and seawater systems, heat exchangers, desalination plants, and high-temperature industrial applications.
Can Nickel Alloy 200/201 pipes and fittings be welded?
Yes, both alloys are weldable and can be easily fabricated without compromising mechanical strength or corrosion resistance.
What is the maximum service temperature of Nickel Alloy 200/201?
They can safely operate at temperatures up to 600°C (1112°F) while maintaining their mechanical and corrosion-resistant properties.
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