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Nickel Alloy 200 and 201 flanges are high-performance industrial components designed for critical applications in corrosive and high-temperature environments. Manufactured from pure nickel (Alloy 200) and low-carbon nickel (Alloy 201), these flanges exhibit exceptional corrosion resistance, making them ideal for chemical processing, marine, and petrochemical industries.
Nickel Alloy 200 and 201 flanges are produced according to ASTM B564 standards and are widely recognized under UNS N02200 (Alloy 200) and UNS N02201 (Alloy 201). The alloys are composed primarily of nickel with minimal impurities, ensuring consistent mechanical strength and chemical stability. Alloy 201 is preferred where sulfur content control and weldability are critical.
Both Alloy 200 and Alloy 201 flanges provide outstanding resistance to a variety of corrosive media, including caustic alkalis, hydrochloric acid, and phosphoric acid. Alloy 201, with its lower carbon content, is particularly suitable for environments where stress corrosion cracking is a concern.
These flanges offer excellent tensile strength, ductility, and impact resistance. Alloy 200 has a tensile strength of approximately 585 MPa and elongation of 30%, while Alloy 201 offers slightly higher strength with comparable elongation, making both materials ideal for pressure-containing applications.
Nickel Alloy 200 and 201 flanges can operate effectively over a wide temperature range, from cryogenic conditions to high temperatures exceeding 600°C. This makes them suitable for heat exchangers, boilers, and high-temperature chemical processes.
Nickel Alloy flanges are available in various types, including weld neck, slip-on, socket weld, blind, and threaded flanges. They come in standard dimensions as per ASME B16.5 and ASME B16.47, ensuring compatibility with global piping systems.
Both Alloy 200 and 201 flanges are easily fabricated, machined, and welded using standard nickel welding procedures. Alloy 201, with its lower carbon content, is more suitable for heavy welding applications and reduces the risk of carbide precipitation during high-temperature exposure.
These flanges are extensively used in chemical processing, oil and gas, marine engineering, desalination plants, and pharmaceutical industries. Their resistance to oxidizing and reducing agents makes them reliable for long-term service in aggressive chemical environments.
Nickel Alloy 200 and 201 flanges undergo strict quality testing, including radiographic inspection, dimensional checks, and mechanical testing, to ensure compliance with ASTM and ASME standards. This guarantees high performance, safety, and longevity in demanding industrial applications.
Specification Table
| Property | Nickel Alloy 200 | Nickel Alloy 201 | Standard |
|---|---|---|---|
| UNS Number | N02200 | N02201 | ASTM B564 |
| Chemical Composition (Wt%) | Ni: 99.0 min, C: 0.15 max, Fe: 0.40 max, Cu: 0.30 max | Ni: 99.0 min, C: 0.03 max, Fe: 0.40 max, Cu: 0.30 max | ASTM B564 |
| Density | 8.90 g/cm³ | 8.90 g/cm³ | ASTM B564 |
| Melting Point | 1455-1458°C | 1455-1458°C | ASTM B564 |
| Tensile Strength | 585 MPa | 620 MPa | ASTM B564 |
| Yield Strength (0.2% offset) | 275 MPa | 310 MPa | ASTM B564 |
| Elongation | 30% | 35% | ASTM B564 |
| Hardness | HRB 75 max | HRB 80 max | ASTM B564 |
| Operating Temperature | Up to 600°C | Up to 600°C | ASTM B564 |
Mechanical Properties (Typical)
| Property | Nickel Alloy 200 | Nickel Alloy 201 | Standard |
|---|---|---|---|
| Tensile Strength (MPa) | 585 | 620 | ASTM B564 |
| Yield Strength (0.2% offset, MPa) | 275 | 310 | ASTM B564 |
| Elongation (%) | 30 | 35 | ASTM B564 |
| Hardness (HRB) | 75 max | 80 max | ASTM B564 |
| Modulus of Elasticity (GPa) | 207 | 207 | ASTM B564 |
| Poisson’s Ratio | 0.31 | 0.31 | ASTM B564 |
| Operating Temperature | Up to 600°C | Up to 600°C | ASTM B564 |
Equivalent Grades
| Standard | Nickel Alloy 200 | Nickel Alloy 201 |
|---|---|---|
| UNS | N02200 | N02201 |
| ASTM | B564 / B162 | B564 / B162 |
| ASME | SB-564 / SB-162 | SB-564 / SB-162 |
| EN | 2.4066 | 2.4066 |
| JIS | SN0200 | SN0201 |
| DIN | 2.4066 | 2.4066 |
| British Standard (BS) | Ni 200 | Ni 201 |
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.
| NPS (inches) | DN (mm) | Flange Type | Outside Diameter (OD, mm) | Bolt Circle Diameter (BCD, mm) | No. of Bolts | Bolt Size | Thickness (mm) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 1/2" | 15 | Weld Neck | 90 | 65 | 4 | ½"-13 UNC | 14 | 1.2 |
| 1" | 25 | Slip-On | 120 | 85 | 4 | ⅝"-11 UNC | 16 | 2.5 |
| 2" | 50 | Weld Neck | 150 | 110 | 4 | ⅞"-9 UNC | 18 | 5.0 |
| 4" | 100 | Blind | 230 | 185 | 8 | ¾"-10 UNC | 22 | 12.5 |
| 6" | 150 | Slip-On | 280 | 240 | 8 | 7/8"-9 UNC | 24 | 21.0 |
| 8" | 200 | Weld Neck | 350 | 305 | 8 | 1"-8 UNC | 28 | 35.0 |
| 10" | 250 | Blind | 405 | 360 | 12 | 1"-8 UNC | 32 | 55.0 |
Common Types Of Flangess
Ring Flanges
Type of Flanges
General Flanges
Stainless Alloy Pipe Flanges
ASME B16.5 Flanges
Stainless Alloy Flanges
Frequently Asked Questions (FAQ)
What are Nickel Alloy 200 & 201 Flanges?
Nickel Alloy 200 and 201 flanges are high-performance piping components made from commercially pure nickel. Alloy 200 has standard nickel content, while Alloy 201 has reduced carbon content for improved corrosion resistance and weldability.
What standards do these flanges comply with?
These flanges are manufactured according to ASTM B564 and ASME SB-564 standards. They also meet global equivalents under UNS N02200 (Alloy 200) and UNS N02201 (Alloy 201).
What types of flanges are available in Nickel Alloy 200 & 201?
Common flange types include Weld Neck, Slip-On, Socket Weld, Blind, Threaded, and Lap Joint flanges. They are available in various dimensions as per ASME B16.5 and B16.47 standards.
What are the key mechanical properties of these flanges?
Nickel Alloy 200 has tensile strength ~585 MPa, yield strength ~275 MPa, and elongation ~30%. Alloy 201 has tensile strength ~620 MPa, yield strength ~310 MPa, and elongation ~35%. Both flanges have excellent hardness and ductility.
Where are Nickel Alloy 200 & 201 Flanges commonly used?
They are used in chemical processing, petrochemical, marine, desalination, pharmaceutical, and high-temperature industrial applications due to their excellent corrosion resistance and durability.
Pipes & Tubes Supplier
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