ALLOY 20
(ASTM A 265, B 366, B 463, B 464, B 471, B 472, B 473, B 474, B 475, UNS N08020, NACE MR0175)
Other common names: Carpenter 20, 20Cb-3, Incoloy alloy 20Alloy 20, also known as Carpenter 20, is a nickel-iron-chromium austenitic alloy that was developed for maximum resistance to acid attack, specifically sulfuric acid. This Alloy has excellent resistance to general corrosion, pitting, and crevice corrosion in chemicals containing chlorides and sulfuric, phosphoric, and nitric acids. It also contains niobium for stabilization against sensitization and resultant intergranular corrosion. Alloy 20 combines excellent corrosion resistance with elevated mechanical properties and relatively easy fabrication. Alloy 20 is now a popular choice for a wide variety of industries including the chemical, food, pharmaceutical, and plastics industries. In addition, this Alloy is used in heat exchangers, mixing tanks, metal cleaning and pickling equipment, and piping.
Specification of Nickel Alloy 20 Round Bars:
Standard: |
ASTM B 473, ASME SB 473, UNS N08020 |
Grades : |
Werkstoff Nr. 2.4660,Round, Square, Hex (A/F), Bush , ASTM B 473, ASME SB 473, UNS N08020 / Werkstoff Nr. 2.4660 |
Form : |
Round, Square, Hex (A/F), Bush, Rectangle , Flat, Wire Mesh |
Length : |
Random, Fix & Cut Length or as per Customer Requirment |
Features : |
· Market leading prices |
Applications : |
· Chemical and allied industries |
Characteristics of Alloy 20
- Excellent general corrosion resistance to sulfuric acid
- Excellent resistance to chloride stress corrosion cracking
- Excellent mechanical properties and fabricability
- Minimal carbide precipitation during welding
- Excels in resisting corrosion to hot sulfuric acids
Chemical Composition (%) of Nickel Alloy 20 Round Bar :
| Ni | Fe | Cr | Cu | Mo | Nb |
| 32.00-38.00 | Balance | 19.0-21.0 | 3.0-4.0 | 2.0-3.0 | 8xC-1.0max |
| C | Mn | P | S | Si | |
| 0.07max | 2.0max | 0.045max | 0.035max | 1.0max |
Mechanical Properties of Nickel Alloy 20 Round Bar :
| Form | Tensile Min. | Yield Min. (.2% offset) | Elongation Min. | Reduction of Area Min. |
| Bar (hot or cold finished) | 80 ksi | 35 ksi | 30% | 50% |
| Sheet/Plate | 80 ksi | 35 ksi | 30% | - |