Nickel 200/201 are the premier materials for resisting caustic soda and alkaline environments. This article explores their thermal conductivity, mechanical differences between high and low carbon grades, and their essential role in chemical evaporators.
Nickel 200/201: The Standard for Chemical Processing Stability
In the chemical processing industry, maintaining material integrity in highly corrosive environments is critical.
Nickel 200 (UNS N02200) and its low-carbon variant,
Nickel 201 (UNS N02201), are commercially pure wrought nickels that offer the best resistance to caustic alkalis, particularly caustic soda (NaOH) and caustic potash (KOH).
While Nickel 200 is the standard for temperatures below 315°C (600°F), Nickel 201 is preferred for higher temperature applications due to its resistance to graphitization.
Technical Comparison and Material Constants
The primary advantage of these alloys lies in their exceptional resistance to neutral and alkaline salt solutions. Their high thermal and electrical conductivity also make them valuable for specialized electrical components.
Nickel 200/201 Mechanical & Physical Properties
| Property |
Nickel 200 |
Nickel 201 |
| Carbon Content |
0.15% max |
0.02% max |
| Tensile Strength |
462 MPa |
403 MPa |
| Yield Strength (0.2% Offset) |
148 MPa |
103 MPa |
| Thermal Conductivity |
70.2 W/m·K |
79.3 W/m·K |
| Density |
8.89 g/cm³ |
8.89 g/cm³ |
Industrial Applications in Caustic Environments
Nickel 200 and 201 plates are the backbone of equipment that handles concentrated alkalis. Their ability to form a passive oxide film protects the substrate from high-velocity chemical flow.
- Caustic Evaporators: Essential for the concentration of caustic soda up to 50% or higher.
- Chemical Storage: Used for tanks and vessels transporting highly pure chemicals where contamination must be avoided.
- Synthetic Fiber Production: Maintaining high product purity in the manufacturing of viscose and other synthetic materials.
As a dedicated supplier,
Wuxi Xinshanhu Steel Co., Ltd. offers high-purity Nickel 200/201 plates and sheets compliant with ASTM B162, ensuring your caustic processing systems operate with maximum safety and longevity.
