Overview

Heat exchangers specify nickel for one reason: it moves heat in environments where copper and aluminum cannot live. Nickel 200 rod and bar in Ni200 (UNS N02200) and Ni201 (UNS N02201) conducts heat at 70.2 W/m·K — roughly four times stainless steel — with only a modest decline as temperature rises, while holding corrosion resistance in the caustic and reducing media that rule out common heat-transfer metals. Annealed bar in 8, 10, 12 and 20 mm diameters is kept in stock; other sizes run from 3-300 mm per drawing. Every lot ships with a mill test certificate (EN 10204 3.1).

Thermal Conductivity in Perspective

Nickel's thermal conductivity is good — not magical, and the distinction matters for selection. At 70.2 W/m·K, Ni200 conducts roughly four times as well as stainless steel (~15 W/m·K) and better than most corrosion-resistant alloys, which is exactly why it is chosen for heat-transfer duty where stainless would throttle the heat and copper or aluminum would corrode. Copper (~400 W/m·K) and aluminum (~237 W/m·K) conduct far better, but they do not survive caustic and reducing process media. So the honest spec is not "the most conductive metal" — it is the most conductive corrosion-resistant bar for the media you run.

Specifications

The full shape and surface program for Pure Nickel Bar covers round, hexagonal and square forms with black, peeled, polished and cold drawn surfaces.

Key Strengths

• Thermal conductivity 70.2 W/m·K at room temperature — about 4× stainless steel, modest decline at temperature.

• Heat-transfer grade that survives caustic and reducing media (where copper/aluminum corrode).

• Ni200 for general thermal duty; Ni201 (C ≤0.02%) for parts seeing sustained service above 315°C.

• 8-20 mm in stock with 3-7 day dispatch; 3-300 mm per drawing.

• Mill test certificates (EN 10204 3.1) recording lot composition and mechanicals.

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Technical Details

Thermal Conductivity Data, by Condition

At room temperature Ni200 conducts 70.2 W/m·K; like most metals the value declines modestly as temperature rises, so a part operating at a few hundred degrees still moves heat effectively — the page's own influencing-factors note is correct on this point. Thermal properties are a function of the metal itself, not the bar's surface state, so the same conductivity applies across black, peeled, polished and cold drawn finishes. Where heat must also move through a joint, the weldability of the Pure Nickel Series grades keeps joint conductivity close to the parent metal.

Heat Exchange and Thermal Parts

Nickel rod and bar appear as machined heat-transfer components — exchanger parts, heater elements, thermal fittings and sensor hardware — in chemical and process plants where the media would destroy copper and aluminum. The engineering trade-off is exactly the one this page states plainly: choose nickel when corrosion rules out the better conductors, and size the section for the lower (but dependable) conductivity. Confirm media, temperature and duty with your drawing and the grade is confirmed against the service, not a datasheet guess.

Grades and Surface for Thermal Duty

Ni200 is the standard choice for thermal components in chemical service; Ni201 takes the same parts above roughly 315°C, where its low carbon avoids grain-boundary embrittlement. Machined fins, flanges or sensor housings start from the surface state that suits the process — peeled or bright bar for tight machined features, black bar where the part is machined all over. If conductivity is the requirement, grade and section carry the heat; surface state carries the machining.

Inspection and Certification

Every batch is checked before it ships: chemical composition by spectral analysis, mechanical properties by tensile and hardness testing, and dimension, straightness and surface by calibrated inspection. Corrosion behavior is verified against the grade standard, and weldability is confirmed on the certificate where welded service is declared. Mill test certificates (EN 10204 3.1) record the results, and each bar carries melt and lot traceability back to production.

Chemical Composition

Mechanical & Physical Properties

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 (stable electrical performance — resistor duty belongs to NiCr alloys), coefficient of thermal expansion (Ni200) ≈13.3 µm/m·K, magnetic (ferromagnetic below Curie point 358°C).

Quality Assurance

Produced under ISO 9001 quality systems and SGS-verified processes, each bar batch passes chemical composition analysis, mechanical property testing, and dimensional and surface inspection before packing. Inspection methods follow the grade standards: spectral analysis for composition, tensile and hardness testing for mechanicals, calibrated measurement for dimension and straightness. Mill test certificates (EN 10204 3.1) document each lot.

Applicable Standards

Ni200/Ni201: ASTM B160 (Nickel Rod and Bar). Export documentation per EN 10204 3.1. N4/N6 Chinese-grade equivalents follow GB/T 4435 on request.

References

Material data follows ASTM B160; thermal conductivity values reference ASM Specialty Handbook: Nickel, Cobalt, and Their Alloys and standard engineering data for comparative metals; batch-level composition and mechanicals are verified against mill test certificates (EN 10204 3.1) and in-house inspection records.

Packaging & Delivery

Bar is supplied in bundles with protective wrapping, packed in export wooden cases, and labeled with grade, size, surface and weight. Worldwide shipping is quoted per destination. In-stock diameters dispatch in 3-7 days, standard production in 7-15 days, and custom sizes in 15-30 days per drawing. Payment by L/C, T/T, Western Union or MoneyGram.

About DZX Alloy

DZX Alloy has melted and processed nickel-based materials in Jiangsu, China since 2002, under ISO 9001 and SGS quality systems. Beyond the bar itself, buyers of thermal components get the data that makes the part work: certified conductivity values, grade selection against service temperature, and drawings quoted with surface, tolerance and delivery confirmed before scheduling. Export experience across 60+ countries keeps the same UNS grades and documentation available for repeat heat-exchange and thermal-management programs.

Submit your drawing and quantity for a confirmed quote.

FAQ

Q: What is the brand name of this product?
A: The brand name is DZX Alloy.

Q: What grades are available?
A: Ni200 (UNS N02200) and Ni201 (UNS N02201); N4/N6 are available on request.

Q: What is the thermal conductivity of this nickel rod?
A: Ni200 conducts 70.2 W/m·K at room temperature — about four times stainless steel — with only a modest decline at elevated temperature. Copper and aluminum conduct more, but corrode in the media where nickel is specified.

Q: How is pricing determined?
A: Pricing is quoted by grade, diameter and quantity — send the drawing or spec and the mill returns a confirmed FOB quote. We do not publish nominal prices that ignore size and grade.

Q: What sizes are available?
A: 8 mm, 10 mm, 12 mm and 20 mm diameters are stocked; other diameters from 3-300 mm and lengths up to 6000 mm are produced per drawing.

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, 15-30 days for custom sizes (per drawing).

Q: Do you issue mill certificates?
A: Yes, mill test certificates (EN 10204 3.1) recording actual lot composition are issued with each shipment on request.

Q: What are the accepted payment terms?
A: L/C, T/T, Western Union and MoneyGram are accepted.