Nickel 200, 201, and 233 are commercially pure wrought nickels supplied for chemical processing, oil and gas, electrical and electronic, and industrial equipment applications. Nickel 200 is also identified as UNS N02200, Nickel 201 as UNS N02201, and Nickel 233 as UNS N02233, with ASTM specifications including B160, B161, B162, and B163.
The three grades share the same 99.0% minimum nickel base composition but differ in their controlled residuals, particularly carbon content, which drives service temperature limits and forming behavior.
EFINEA stocks the Nickel 200 material, Nickel 201 material, and Nickel 233 material in round bar, rod, sheet, strip, and coil, all mill certified and ready to ship.
For questions about which grade fits your design, our sales engineers and metallurgists are reachable at 800-348-6268.
Nickel 200, 201 & 233 Forms Available from EFINEA
EFINEA stocks Nickel 200 and Nickel 201 in round bar, rod, sheet, strip, and coil. Nickel 233 is primarily stocked in sheet, with custom forms available on request from the mill. All stock material ships with mill certification traceable to the original mill.
Nickel 200 & 201 Round Bar and Rod
EFINEA stocks Nickel 200 and Nickel 201 round bar across standard diameters. Custom cut lengths are available through in-house saw and waterjet services. Multiple temper conditions and diameters support prototype and production requirements.
Nickel 200, 201 & 233 Sheet
EFINEA stocks Nickel 200, 201, and 233 sheet in standard gauges to ASTM B162. Custom slitting and shearing are available for narrower widths and blanks. Nickel 233 sheet is available in multiple thicknesses, including specified gauges.
Nickel 200 & 201 Strip and Coil
EFINEA stocks Nickel 200 and Nickel 201 strip and coil in annealed condition across a range of widths and tempers. Custom slitting is available for narrow-width strip. Multiple widths and temper conditions support production requirements.
Why Choose EFINEA Metals as Your Nickel Alloy Supplier
EFINEA Metals has supplied specialty metals and alloys to high-technology industries since 1965. As a Nickel 200, Nickel 201, and Nickel 233 alloy distributor with inventory across four ISO 9001:2015 and AS9100D-certified facilities in New Jersey and California, EFINEA ships standard stock within 24 hours of order confirmation.
- Nickel 233 sheet in stock. Most distributors carry 200 and 201; 233 is harder to source on short notice. EFINEA maintains 233 sheet inventory at the gauges most often called out on electrical and electronic drawings.
- Grade selection guidance from staff metallurgists. When a drawing calls for Nickel 200 in service above 315°C, our sales engineers will flag the risk before the order ships and recommend a replacement grade where appropriate.
- Documentation for pressure vessel and process equipment programs. Mill certifications ship with every order, traceable to the original mill, and source mills meet ASTM and ISO standards as well as ASME Section II Part B material requirements.
- In-house precision cutting, shearing, slitting, and waterjet services. Custom slitting on 200 and 201 strip and coil for battery, connector, leadframe, and EMI shielding work is handled internally.
- More than 60 years of continuous nickel alloy supply, with institutional knowledge across customer programs in chemical processing and industrial electronics.
As a Nickel 200, Nickel 201, and Nickel 233 alloy supplier, EFINEA accepts orders of any size, from research and prototype quantities through production runs supporting chemical processing, oil and gas, electrical, electronic, and industrial equipment manufacturers.
What Are Nickel 200, 201, and 233?
All three grades are commercially pure wrought nickels with a nickel content of 99.0% minimum. They share the same general property profile: good mechanical strength at moderate temperatures, low electrical resistivity, high thermal conductivity, and strong corrosion resistance across neutral and mildly reducing environments. Composition limits are controlled under ASTM B160 (rod and bar), ASTM B161 (seamless pipe and tube), ASTM B162 (plate, sheet, and strip), and ASTM B163 (condenser and heat exchanger tubes).
Where the grades differ is in carbon content and other controlled residuals that determine high-temperature behavior, cold-forming performance, electrical properties, and resistance to embrittlement at elevated temperatures. The differences are small in absolute terms but have substantial consequences for which grade should be specified for a given application.
Nickel 200 (UNS N02200)
Nickel 200 is the general-purpose commercially pure grade. Carbon content is held at 0.15% maximum. The grade has good mechanical properties and excellent corrosion resistance in caustic alkalis and reducing acids. Reliable service extends up to approximately 315°C (600°F). Above that temperature, graphite precipitation at grain boundaries can cause embrittlement.
Composition and properties are specified to ASTM B160 and ASTM B162.
Nickel 201 (UNS N02201)
Nickel 201 is the low-carbon variant developed for service above 315°C and for parts requiring better cold formability. Carbon content is held to 0.02% maximum, approximately an eighth of Nickel 200’s maximum, which prevents graphite precipitation during prolonged elevated-temperature exposure. The lower carbon also reduces hardening during cold work, which improves deep-draw and spinning behavior.
Common services include caustic soda concentration equipment, plate evaporators, components that must operate above the temperature limit of Nickel 200, and parts requiring substantial cold forming during fabrication.
Nickel 233 (UNS N02233)
Nickel 233 is a tightly controlled commercially pure grade specified for electrical and electronic applications. Chemistry is held to limits that improve electrical conductivity, reduce inclusions affecting drawability, and produce a uniform microstructure suited to stamping and forming operations.
The grade is subject to intergranular embrittlement by sulfur compounds at service temperatures above 315°C, which should be considered for any application involving sulfur-bearing atmospheres or process media at elevated temperatures.
Nickel 200, 201 & 233 Properties and Applications
For full property tables (chemistry, physical and mechanical property data, temperature-dependent behavior, and specifications) and detailed application coverage across chemical processing, electrical and electronic components, oil and gas service, and industrial equipment, see our dedicated Nickel 200, 201 & 233 Properties and Applications page.
The short version: commercially pure wrought nickels combine corrosion resistance in caustic and neutral-to-mildly-reducing environments with the high thermal and electrical conductivity that pure nickel provides. The grades show low gas content and low vapor pressure, exhibit magnetic and magnetostrictive properties, and are readily fabricated using standard forming, machining, joining, and finishing techniques. Common end uses include:
- Caustic soda processing equipment
- Electroplating anodes
- Marine and seawater service components
- Battery and capacitor electrodes
- Electronic enclosures
- Transistor packaging
- Hydrogen thyratron components
- Anode plates
- Plater bars
- Heat exchanger and condenser tubing
For comparison against the higher-purity electronic nickels EFINEA stocks, see our Nickel 205 & 270 page.
Frequently Asked Questions About Nickel 200, 201, and 233 Alloy
Commercially pure nickels are not heat-treatable in the precipitation-hardening sense. They remain single-phase austenitic at all service temperatures. Annealing is used to soften cold-worked material and restore ductility, and stress-relief treatments are sometimes specified after extensive cold forming or welding. The grades work-harden during cold deformation, which can be used as a strengthening mechanism when higher strength is required.
Yes. Commercially pure nickel is ferromagnetic at room temperature, with a Curie temperature of approximately 358°C for Nickel 200. The magnetic behavior is generally not a primary design driver but can matter for instrument enclosures, components placed near sensitive electronics, and parts used in magnetic field measurements or magnetic resonance environments.
Yes. All three grades are readily welded by GTAW (TIG), GMAW (MIG), SMAW (stick), submerged arc, and resistance welding processes. Filler metals matching the parent chemistry (ERNi-1 or equivalent) are commercially available. For sulfur-bearing service or elevated-temperature applications, low-carbon Nickel 201 is generally preferred for both the parent material and the filler to avoid embrittlement of the weld zone. Pre-weld cleaning is important, since surface sulfur or other low-melting contaminants can cause cracking during welding.