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Overview
Specifications
Alloy 20
Alloy 20 is an iron-base, austenitic alloy with excellent corrosion resistance. Designed specifically to withstand sulfuric acid, its nickel, chromium, molybdenum, and copper levels provide excellent general corrosion resistance.
Chemical Composition
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 32.5 – 35.0 |
| Chromium (Cr) | 19.0 – 21.0 |
| Molybdenum (Mo) | 2.0 – 3.0 |
| Copper (Cu) | 3.0 – 4.0 |
| Carbon (C) | 0.07 max |
| Manganese (Mn) | 2.0 max |
| Silicon (Si) | 1.0 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.035 max |
| Niobium (Nb) + Ta | 8 x C min – 1.0 max |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Value (Minimum) |
|---|---|
| Tensile Strength | 80,000 psi |
| Yield Strength (0.2% Offset) | 35,000 psi |
| Elongation in 2″ | 30% |
| Hardness (max) | 95 HRB |