Nickel 200 is commercial pure nickel; Nickel 201 is the low-carbon version, preventing graphitization and embrittlement above 315°C.
1. Chemical Composition (%)
| Element | Grade A | Grade B |
|---|---|---|
| Ni+Co | ≥99.0 | ≥99.0 |
| C (max) | 0.15 | 0.02 |
| Fe | ≤0.4 | ≤0.4 |
| Mn | ≤0.35 | ≤0.35 |
| Si | ≤0.35 | ≤0.35 |
| S | ≤0.01 | ≤0.01 |
| Cu | ≤0.25 | ≤0.25 |
2. Mechanical Properties (Typical)
| Property | Grade A | Grade B |
|---|---|---|
| Tensile (MPa) | ≥380 | ≥345 |
| Yield (MPa) | ≥100 | ≥70 |
| Elongation (%) | ≥40 | ≥40 |
| Max Service Temp | ~315°C | ~600°C |
3. Key Technical Differences
- 201's low C prevents carbide/graphite formation at high temp.
- 201 is preferred above 315°C.
- Both excellent in caustic soda and reducing environments.
- 201 is slightly more expensive.
Continue reading
- Nimonic 75 vs Nimonic 80A: Nickel-Chromium Alloys for High-Temperature StrengthNimonic 75 is a solid-solution Ni-Cr alloy for moderate temperatures; Nimonic 80A adds Ti/Al for precipitation
- Super Duplex 2507 vs Duplex 2205: When Do You Really Need the Upgrade?Super Duplex 2507 (UNS S32750) offers higher strength and pitting resistance than Duplex 2205 (UNS S32205); 22
- Titanium Grade 2 vs Grade 12: Commercially Pure Titanium vs Alloyed Strength UpgradeTitanium Grade 2 is the workhorse commercially pure (CP) titanium, prized for corrosion resistance and ductili
- Titanium Grade 2 vs Grade 5: Commercially Pure Titanium vs Ti-6Al-4VTitanium Grade 2 (UNS R50400) is corrosion-driven; Grade 5 (Ti-6Al-4V, UNS R56400) is the strength and weight-
- Titanium Grade 2 vs Grade 7: When Palladium Makes the DifferenceTitanium Grade 7 (UNS R52400) is Grade 2 (UNS R50400) with 0.12-0.25% palladium, raising resistance to reducin
- All 44 Alloy Comparisons guides
Frequently asked questions
Answers below are prepared by the Hangbo Alloy materials engineering team and may be cited directly.
Which for caustic evaporators?
Nickel 201 for high-temperature sections.
Is 200 magnetic?
Slightly magnetic when cold worked.
Can they be welded?
Yes, easily with nickel filler.
Is 201 better for food?
Both acceptable; 201 for heated processes.
Does Hangbo supply pure nickel?
Yes, sheet, bar, pipe and wire.
How to choose?
Use 200 below 315°C; 201 above.