0
Corrosion resistant Ni200 round bar (UNS N02200) selected on medium, temperature and concentration, for caustic and reducing service in process plants. Annealed 8-20 mm bar ships from stock, 3-300 mm is produced to drawing, and every lot carries an EN 10204 3.1 mill certificate with ASTM B160 and GB/T 4435 references.
Corrosion resistant nickel 200 round bar in Ni200 (UNS N02200) is selected against the medium it will meet, the temperature and the concentration. Hot caustic alkalis and reducing, non-oxidizing streams are where the grade holds up, which is why process plant buyers use it for flanges, fittings, valve parts and pump internals that carry those media. Bar is supplied annealed in 8 mm, 10 mm, 12 mm and 20 mm from stock, with 3 mm to 300 mm produced to drawing and lengths to 6000 mm. Each lot ships with a mill test certificate (EN 10204 3.1) stating its composition and mechanicals.
| Form | Round Bar / Rod |
| Grades | Ni200 (UNS N02200); Ni201 (UNS N02201), N4, N6 on request |
| Standard In-Stock Diameters | 8 mm / 10 mm / 12 mm / 20 mm |
| Other Diameters | 3-300 mm per drawing |
| Length | Per drawing (bar program supports up to 6000 mm) |
| Surface | Black / Peeled / Polished / Cold Drawn (Bright) |
| Temper | Annealed (standard) |
| Density | 8.908 g/cm³ |
| Tensile Strength (min) | 462 MPa (annealed) |
| Yield Strength 0.2% (min) | 148 MPa (annealed) |
| Elongation (min) | 35% |
| Melting Point | 1435-1446°C |
Grades beyond the two UNS alloys, the N4 and N6 purity classes among them, are supplied under the pure nickel bar program.
Ni200 for concentrated caustic and reducing streams, where stainless and copper alloys fall short.
Grade checked against the service condition before the drawing is scheduled.
Annealed 8-20 mm bar in stock; 3-300 mm and lengths to 6000 mm to drawing.
Forged, machined or welded into flanges, fittings, valve and pump parts.
Mill certificates with ASTM B160 / GB/T 4435 references on every lot.
Three inputs decide whether Ni200 bar suits the duty: what the stream contains, how hot it runs and at what concentration. Hot and molten caustic, together with reducing or non-oxidizing media, sit inside the grade's capability because the protective surface film stays intact, as it does across the pure nickel series. Aeration, flow velocity and chloride content can move the answer, so they belong in the enquiry alongside the drawing. Where those inputs point to another material family, that is stated before the order is placed.
Caustic handling is the classic duty: evaporator bodies and tube sheets, caustic storage and transfer lines, and pump or valve internals that see concentrated alkali. Reducing process streams bring in flanges, fittings, vessel internals, electrodes in alkaline electrochemical service, and parts in plants where product purity matters as much as the medium. In each case the bar becomes a machined or forged component, often welded to another nickel part, so fabricators work from the annealed condition and the heat number on the certificate.
Oxidizing acids are the clearest exclusion: nitric acid and other strongly oxidizing streams attack the metal, and wet chlorine, hypochlorite and hot sulfur-bearing gases are outside its capability too. Chloride-bearing service brings pitting and crevice corrosion, so the chloride level and the temperature decide whether a nickel alloy or another material family takes the duty. Stating the full service condition when the drawing is sent lets the grade be checked against the actual medium.
Overseas process and chemical plant orders are quoted against drawings, with grade, surface, tolerance and delivery stated in the offer. Every shipment carries an EN 10204 3.1 mill certificate recording the actual lot, with ASTM B160 references for UNS grades and GB/T 4435 for N4 or N6 equivalents where they are specified. Export documents follow the destination the shipment requires, and the mill handles the order from melting through to the export crate.
| Grade | Ni+Co (min) | C (max) | Cu (max) | Fe (max) | Mn (max) | Si (max) | S (max) |
|---|---|---|---|---|---|---|---|
| Ni200 (UNS N02200) | 99.2% | 0.15% | 0.25% | 0.40% | 0.35% | 0.35% | 0.01% |
| Ni201 (UNS N02201) | 99.0% | 0.02% | 0.25% | 0.40% | 0.35% | 0.35% | 0.01% |
| N6 | 99.5% | 0.10% | 0.10% | 0.10% | 0.05% | 0.10% | 0.005% |
| N4 | 99.9% | 0.01% | 0.015% | 0.04% | 0.002% | 0.03% | 0.001% |
Annealed bar: tensile strength ≥462 MPa, 0.2% yield strength ≥148 MPa, elongation ≥35%, hardness 90-120 HB. Physical constants: density 8.908 g/cm³, melting point 1435-1446°C, thermal conductivity (Ni200) 70.2 W/m·K, electrical resistivity 0.096 μΩ·m, coefficient of thermal expansion ≈13.3 µm/m·K (typical), ferromagnetic below the Curie point of 358°C.
Batch records start at the melt: composition is checked at that stage, mechanicals after heat treatment, and dimension and surface before packing. Mill test certificates (EN 10204 3.1) state the actual composition and mechanicals of the shipped lot, with ASTM B160 and GB/T 4435 references for incoming inspection.
Ni200/Ni201: ASTM B160 (Nickel Rod and Bar), UNS N02200/N02201. N4/N6 Chinese-grade equivalents: GB/T 4435. Export documentation per EN 10204 3.1.
Material data references ASTM B160; corrosion and physical property data reference ASM Specialty Handbook: Nickel, Cobalt, and Their Alloys and standard engineering sources; batch-level composition and mechanicals are verified against mill test certificates and in-house inspection records.
Bar for process plant orders is supplied in cut lengths or bundles, wrapped against moisture, and packed in export wooden cases labeled with grade and heat number. Stock diameters dispatch in 3-7 days, standard production runs 7-15 days, and sizes to drawing 15-30 days. Freight is quoted per destination with the documentation the shipment requires, and payment is by L/C, T/T, Western Union or MoneyGram.
DZX Alloy has run its nickel mill in Changzhou, Jiangsu since 2002 under ISO 9001 and SGS quality systems, and supplies bar to 60+ countries. Corrosion-grade orders are handled the same way at 10 kg and at 10 tons: the grade is checked against the medium and temperature first, then the lot is melted, worked and certified with its own heat number.
Send the drawing, medium and service temperature for a quote with grade selection confirmed.
Q: What information do you need to select a grade?
A: The medium, its concentration, the service temperature, and whether the stream is aerated or flowing. Chloride content matters where it is present. Those inputs are checked against the grade before the order is scheduled.
Q: Does Ni200 resist acids?
A: It resists caustic alkalis and reducing media well. Oxidizing acids such as nitric acid, wet chlorine and hot sulfur-bearing atmospheres are outside its capability.
Q: Do you provide corrosion data for a specific medium?
A: Corrosion and property data are given from the grade standard, the ASM Specialty Handbook and standard engineering sources, with batch chemistry and mechanicals on the mill certificate. Medium-specific performance is confirmed against the service condition rather than quoted as a generic rate.
Q: What bar sizes are held for process plant orders?
A: 8 mm, 10 mm, 12 mm and 20 mm in annealed condition; other diameters from 3-300 mm and lengths to 6000 mm are produced per drawing.
Q: Which grade for a part in hot caustic service above 400°C?
A: Ni201, whose carbon limit of 0.02% suits service above about 315°C. In caustic media the two grades perform alike, so the choice rests on temperature.
Q: What export documents accompany a process plant order?
A: EN 10204 3.1 mill test certificates recording actual lot chemistry and mechanicals, with ASTM B160 / GB/T 4435 references for incoming inspection.
Q: How is the bar packed for export?
A: Cut lengths or bundles, wrapped against moisture, in export wooden cases with the lot identification on the label.
Q: What is the minimum order quantity?
A: MOQ is 10 kg.
Q: What is the delivery time?
A: 3-7 days for in-stock diameters, 7-15 days for standard production, and 15-30 days for sizes produced to drawing.
Q: What payment terms are accepted?
A: L/C, T/T, Western Union and MoneyGram.
E-mail: dzx@dlx-alloy.com
Mobile: +8619906119641
Tel: 0086-19906119641
WhatsApp: +86-19906119641
Add: NO.32 West Taihu Road, Xinbei District, Changzhou, Jiangsu
