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Choudhary Metals is a trusted importer, exporter, and supplier of premium non-ferrous and ferrous metals, serving diverse industries worldwide. With a strong focus on quality and reliability, we deliver copper, brass, aluminium, bronze, and other metals in various forms to meet every industrial need.
Alloy 20 plates or alloy 20 was designed in particular to face up to sulfuric acid. Its nickel, chromium, molybdenum and copper tiers all offer remarkable trendy corrosion resistance. Confined carbon plus columbium stabilization allows welded fabrications for use in corrosive environments, typically without put up-weld heat treatment. At 33% nickel, alloy 20 has practical immunity to chloride strain corrosion cracking. This alloy is often selected to solve SCC issues, which might also arise with 316L stainless.
| Ni | Cr | Mo | Mn | Cu | Si | C | S | P | Cb+Ta | Fe | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| MIN | 32.5 | 19.0 | 2.0 | - | 3.0 | - | - | - | - | 8.0 x C 1.0 | - |
| MAX | 35.0 | 21.0 | 3.0 | 2.0 | 4.0 | 1.0 | 0.06 | 0.035 | 0.035 | - | Balance |
| Temperature, °F | 70 | 212 | 392 | 572 | 752 | 842 | 932 |
|---|---|---|---|---|---|---|---|
| Coefficient* of Thermal Expansion, in/in°F x 10-6 | - | 8.16 | 8.37 | 8.62 | 8.62 | 8.84 | 8.91 |
| Thermal Conductivity Btu • ft/ft2 • hr • °F |
6.7 | 7.57 | 8.56 | 9.53 | 10.5 | - | - |
| Modulus of Elasticity, Dynamic psi x 106 | 28 | - | - | - | - | - | - |
Minimum Specified Properties, Asme Sb-688 Plate
| Ultimate tensile strength, ksi | 80 |
| 0.2% yield strength, ksi | 35 |
| Elongation, % | 30 |
| Hardness MAX, Brinell | 217 |
Minimum Specified Properties, Asme Sb-688 Plate
| Temperature, °F | 70 |
| Ultimate Tensile Strength, ksi | 91 |
| 0.2% Yield Strength, ksi | 48 |
| Elongation, % | 45 |
| Charpy Impact V-notch, ft-lbs | 200 |
