Nickel 200 and Nickel 201 Flanges
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Nickel 200 and Nickel 201 Flanges - ASTM B564 Supplier in Mumbai
Nicorex Alloys is an ISO 9001 / ISO 14001 certified, trusted supplier of Nickel 200 and Nickel 201 flanges based in Mumbai, India. We provide flanges manufactured in accordance with ASTM B564 / ASME SB564 standards.
Nickel 200 and 201 contain a minimum of 99.0% nickel, giving them extremely high nickel purity for engineering use. Nickel 200 (UNS N02200, Werkstoff 2.4060/2.4066) contains a maximum of 0.15% carbon, while Nickel 201 (UNS N02201, Werkstoff 2.4061/2.4068) contains a maximum of just 0.02% carbon. This difference in carbon content is the key factor when choosing between the two grades. Nickel 201 must be used above 315°C (600°F) because its lower carbon content prevents graphitisation, which can affect Nickel 200 at higher temperatures. Commercially pure nickel is the preferred material for handling molten sodium hydroxide at concentrations up to 100% and temperatures above 315°C. As a result, Nickel 200 and Nickel 201 flanges are widely used in chlor-alkali plant piping, caustic evaporator connections, and concentrated NaOH transfer headers. Typical tensile strength values are 380 MPa (55 ksi) for Nickel 200 and 345 MPa (50 ksi) for Nickel 201, with a yield strength of about 103 MPa (15 ksi). Thermal conductivity is about 70.2 W/m·K. Types include weld neck (WNRF), slip-on (SORF), blind (BLRF), socket weld (SWRF), threaded, lap joint, long weld neck (LWNRF), ring type joint (RTJ), spectacle blind, and reducing flanges. Sizes range from NPS 1/2″ to 24″ (ASME B16.5) and from NPS 26″ to 60″ (ASME B16.47). Pressure classes are available from 150 to 2500.
Both Nickel 200 and Nickel 201 are magnetic and have a Curie temperature of about 358°C. Typical applications include caustic soda production, fluorine and UF₆ processing, food and pharmaceutical piping, and aerospace systems. We provide EN 10204/3.1 mill test certificates with every shipment.
Nickel 200/201 Flanges Specifications
Nickel 200/201 Flanges are available in different grades, types, sizes, pressure ratings, face styles, and dimensions:
| Specification | ASTM B564 / ASME SB564 |
|---|---|
| Flange Types | WNRF, SORF, BLRF, SWRF, Threaded, Lap Joint, LWNRF, RTJ, Spectacle Blind, Reducing |
| Size (B16.5) | NPS 1/2” to 24” |
| Size (B16.47) | NPS 26” to 60” |
| Pressure Class | 150, 300, 400, 600, 900, 1500, 2500 |
| Face Types | RF, FF, RTJ, Tongue & Groove, Male & Female |
| Dimensional Standards | ASME B16.5, B16.47, B16.36, B16.48, MSS SP-44, EN 1092-1, JIS B2220 |
Nickel 200 vs Nickel 201 Flanges - Grade Selection Guide
Both grades share identical corrosion resistance. Nickel 200 (C 0.15% max) gains strength from carbon but is susceptible to graphitisation above 315°C. Nickel 201 (C 0.02% max) avoids this; ASME BPVC-approved up to 677°C.
| Property | Nickel 200 (N02200) | Nickel 201 (N02201) |
|---|---|---|
| Carbon Content | 0.15% max | 0.02% max |
| Min Tensile | 380 MPa (55 ksi) | 345 MPa (50 ksi) |
| Max Service Temp | 315°C (600°F) | 677°C (1250°F) |
| Graphitisation Risk | Yes, above 315°C | No |
| Preferred Use | Ambient-temp caustic, HF acid, food-grade | High-temp caustic evaporators, molten NaOH |
For caustic solutions above 315°C and stronger than 50%, use Nickel 201. For room‑temperature hydrofluoric acid or food-grade service, you can use either Nickel 200 or Nickel 201.
Chemical Composition of Nickel 200/201 Flanges
Chemical composition details for Nickel 200 and Nickel 201 flanges, listing alloy elements and limits defined for each grade:
| Grade | Nickel (Ni) | Carbon (C) | Manganese (Mn) | Silicon (Si) | Iron (Fe) | Copper (Cu) | Sulfur (S) |
|---|---|---|---|---|---|---|---|
| Nickel 200 (N02200) | 99.0% min | 0.15% max | 0.35% max | 0.35% max | 0.40% max | 0.25% max | 0.010% max |
| Nickel 201 (N02201) | 99.0% min | 0.02% max | 0.35% max | 0.35% max | 0.40% max | 0.25% max | 0.010% max |
Carbon is the defining distinction. In Nickel 200, it strengthens the matrix but precipitates as graphite above 315°C. In Nickel 201, the 0.02% max carbon eliminates graphitisation risk. Both grades share identical corrosion resistance.
Mechanical Properties of Nickel 200 Flanges
Mechanical performance data for Nickel 200 flanges supplied in the annealed condition, including strength and ductility values:
| Grade | Tensile Strength (min) | Yield 0.2% Offset (min) | Elongation (min) | Density | Melting Range |
|---|---|---|---|---|---|
| Nickel 200 (N02200) | 380 MPa (55 ksi) | 103 MPa (15 ksi) | 30% | 8.89 g/cm³ | 1435-1446°C (2615-2635°F) |
| Nickel 201 (N02201) | 345 MPa (50 ksi) | 103 MPa (15 ksi) | 30% | 8.89 g/cm³ | 1435-1446°C (2615-2635°F) |
Commercially pure nickel has moderate strength; its value lies in corrosion resistance. Nickel 200 achieves slightly higher tensile (380 vs 345 MPa) from carbon strengthening. Thermal conductivity: 70.2 W/m·K, far exceeding Monel 400 (21.8) or Inconel 625 (9.8).
Nickel 200 and Nickel 201 Equivalent Grades
Nickel 200 and Nickel 201 equivalence chart, listing corresponding international grade designations used across global standards:
| Grade | UNS | Werkstoff Nr. | EN | JIS | AFNOR |
|---|---|---|---|---|---|
| Nickel 200 | N02200 | 2.4060 / 2.4066 | Ni 99.2 / NW 2200 | NW 2200 | N-100M0 |
| Nickel 201 | N02201 | 2.4061 / 2.4068 | LC-Ni 99 / NW 2201 | NW 2201 | – |
Manufacturers often certify material as both N02200 and N02201 when the carbon in the heat is below 0.02%. Verify the MTC to confirm grade compliance.
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Types of Nickel 200/201 Flanges in Stock
Available Nickel 200/201 forged flanges per ASME B16.5 and B16.47:
Nickel 201 Weld Neck Flanges (WNRF)
Nickel 200 Slip-On Flanges (SORF)
Nickel 201 Blind Flanges (BLRF)
Nickel 200 Socket Weld Flanges (SWRF)
Nickel 200 Threaded Flanges
Nickel 201 Lap Joint Flanges (LJRF)
Nickel 200 Long Weld Neck Flanges (LWNRF)
Nickel 201 Ring Type Joint Flanges (RTJ)
Nickel 200 Spectacle Blind and Reducing Flanges
Pressure-Temperature Ratings for Nickel 200/201 Flanges
Nickel 200/201 flanges fall under ASME B16.5 Material Group 3.12. Group 3.12 ratings hold better at elevated temperatures than carbon steel due to nickel’s creep resistance. Nickel 201 is approved by ASME BPVC Section VIII for use up to 677°C, while Nickel 200 can only be used up to 315°C.
Industrial Applications of Nickel 200/201 Flanges
Nickel 200/201 flanges support demanding industrial processes, offering reliable performance in caustic, fluorinated, food-grade, chemical, and aerospace environments:
- Chlor-Alkali & Caustic Soda Production: Chlor-alkali plants use large volumes of high-purity nickel piping. Nickel 201 flanges connect evaporator tubes and pipelines carrying sodium hydroxide (NaOH), even at temperatures above 350°C.
- Fluorine & Uranium Hexafluoride (UF₆) Processing: In nuclear fuel plants, Nickel 200/201 flanges are used in fluorine production units, UF₆ transfer lines, and enrichment system connections. A thin, stable layer of nickel fluoride (NiF₂) forms on the surface and protects the metal from further attack.
- Food & Pharmaceutical Processing: Nickel 200 flanges serve brine cooling circuits, fatty acid handling, and fruit juice concentration systems without imparting metallic taste, meeting FDA food-contact regulations.
- Pulp, Paper & Rayon Manufacturing: In rayon plants using chemicals such as caustic soda, carbon disulfide, and sulfuric acid, Nickel 200/201 flanges join pipelines that carry viscose solutions and kraft liquors.
- Chemical Processing & Acid Handling: These flanges are used on pipelines handling de-aerated sulfuric acid, hydrochloric acid, and various organic acids. They offer excellent resistance to reducing acids in phenol and fatty acid distillation systems.
- Aerospace & Electronics Manufacturing: Because Nickel 200/201 are magnetic, they are used in electroplating bath piping and battery production lines. In aerospace applications, they are also used in systems handling fluorine-based oxidiser propellants.
How to Order Nickel 201 Flanges from Nicorex Alloys
To order Nickel 200 and 201 Flanges, provide these 10 important details:
- Flange Type: WNRF / BLRF / SORF / SWRF / RTJ
- Size: NPS and Schedule (½" to 24"+)
- Pressure Class: 150 / 300 / 600 / 900 / 1500 / 2500
- Face Type: RF / FF / RTJ / T&G
- Material Grade: Nickel 200 / UNS N02200 or Nickel 201 / UNS N02201
- Quantity: Number of pieces or kg
- Standard: ASME B16.5 / B16.47 / ASTM B564
- Additional Requirements: NACE, PMI, min 99% Ni, annealed condition
-
Documentation: MTC 3.1/3.2, PMI, Chemical Composition Report, TPI Certificate
- Delivery: Domestic / International (specify destination)
Frequently Asked Questions
What ASTM specification covers Nickel 200/201 Forged Flanges?
ASTM B564 (ASME SB564) covers Nickel 200 (N02200) and Nickel 201 (N02201) forged flanges. Dimensions follow ASME B16.5 for NPS 1/2″–24″ and ASME B16.47 for NPS 26″–60″.
Can Nickel 200 Flanges handle Hydrofluoric Acid (HF) Service?
Yes, at all concentrations in de-aerated conditions, with corrosion rates below 0.5 mm/year at ambient. A protective NiF₂ film forms. For HF above 315°C, specify Nickel 201.
Are Nickel 200/201 Flanges Magnetic?
Yes, both grades are ferromagnetic with a Curie temperature of ~358°C (676°F). Above this, the alloy becomes paramagnetic. Suitable for magnetic shielding but requires consideration near sensitive instruments.
What Welding Filler Metal is recommended for Nickel 200/201 Flange Joints?
Use ERNi-1 (AWS A5.14) for TIG/GTAW welding and ENi-1 (AWS A5.11) for stick/SMAW welding. For dissimilar joints to carbon steel, use ENiCrFe-3 or ERNiCr-3. Max interpass temperature is 150°C.
What is the Maximum Service Temperature for Nickel 200 Flanges in Pressure Piping?
The temperature is 315°C, which is about 600°F. Above this, carbon (0.15% max) causes graphitisation. For pressure piping above 315°C, specify Nickel 201; it is ASME BPVC Section VIII approved up to 677°C (1250°F).