Guaranteed on time delivery
Gayatri Tubes are a well-known industry that is engaged in manufacturing and offering a very good quality of Alloy 20 Flanges. These flanges are manufactured according to various product quality standards like ASTM, ANSI, etc. It is made available to the national and international clients at different standards, specifications, dimensions, grade, sizes, pressure and classes. We too manufacture and offer it at custom made specifications according to the client’s exact demands from us. These alloy 20 or carpenter 20 flanges are provided to the industrialists in different types. It includes alloy 20 blind flanges, alloy 20 slip-on flanges, alloy 20 weld neck flanges. More types of flanges provided by us is alloy 20 spectacle blind flanges, alloy 20 screwed and threaded flanges, alloy 20 reducing flanges and alloy 20 RTJ flanges.
Alloy 20 Flanges that is called as 20CB-3 or carpenter 20 are the combination of various alloys like molybdenum, chromium, nickel, and copper. It thus provides very good resistance to general corrosion. Alloy 20 flanges are ideal for high pressure and high temperature applications. Alloy 20 is the nickel-based alloy that is designed specifically for easily withstands the harsh atmosphere of the hot sulfuric acid but it too works very well in the ranges of acids. Alloy 20 flanges into the hot sulfuric acid are providing very good performances. These flanges to the SCC at the boiling sulfuric acid at the range of 20-40% concentration offer very good resistance. Also, these flanges are showing usefulness as it is resistance to both nitric as well as phosphoric acid. Pitting and crevice corrosion at the chloride atmosphere and very good ICG resistance to the as-welded condition is making it a good product.
The application where it has found its usability is offshore, heat exchanger, pharmaceuticals, gas processing, pulp & paper industry, specialty chemicals, petrochemicals, seawater equipment, etc. Alloy 20 Flanges are tested for checking the strength. The tests done on it are hardiness test, PMI & IGC test, chemical & mechanical test, pitting resistance test and so on. The TC offered with the product is mill test certifications as per EN10204/3.1b. Also third party test report, radiography test reports are provided.
| STANDARD | WERKSTOFF NR. | UNS | EN | AFNOR |
| Alloy 20 | 2.4660 | N08020 | NiCr20CuMo | Z2NCUD31-20AZ |
| Specifications | ASTM B462 / ASME SB462 |
| Dimensions | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc. |
| Size | 1/2″NB TO 60″NB |
| Flange Face Type | Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
| Class / Pressure | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
| DIN Flanges | DIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673 |
| JIS Flanges | JIS B2220 5K, JIS B2220 10K, JIS B2220 16K, JIS B2220 20K |
| BS Flanges | BS4504 PN 6, BS 4504 PN 10, BS4504 PN 16, BS4504 PN 25, BS4504 PN 40, BS 4504 PN 64, BS 4504 PN 100, BS 4504 PN 160, BS 4504 PN 250, BS 10, BS Table D, BS Table E, BS Table F, BS Table H. |
| Grade | C | Mn | Si | S | Cu | Ni | Cr | Fe | Mo | P |
| Alloy 20 | 0.07 max | 2.00 max | 1.00 max | 0.035 max | 3.00 – 4.00 | 32.00 – 38.00 | 19.00 – 21.00 | 29.85 min* | 2.00 – 3.00 | 0.045 max |
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| Alloy 20 | 8.1 g/cm3 | 1443 °C (2430 °F) | Psi -80,000, MPa -551 | Psi - 35,000, MPa - 241 | 30 % |
