Henan Sheng He Pipe Industry Co., Ltd., have an experience spanning for over ten years, producing and supplying best-in-class products, minimize cost by getting manufacturing processes under one roof and delivering consignments on a daily basis only because of a diligent and dedicated team. We are manufacturers, suppliers and exporters of Alloy 20 material.
Common Trade Names: Carpenter 20, 20Cb-3®, Incoloy® alloy 20
Alloy 20 is an austenitic stainless steel containing less than 50% iron developed for applications involving sulfuric acid. Its corrosion resistance also finds other uses in the chemical, petrochemical, power generation, and plastics industries. Alloy 20 resists pitting and chloride ion corrosion, better than 304 stainless steel and on par with 316L stainless steel. Its copper content protects it from sulfuric acid. Alloy 20 is often chosen to solve stress corrosion cracking problems, which may occur with 316L stainless. Alloy of the same name with the designation “Cb-3” indicates niobium (also known as columbium) stabilized.
Specifications
- ASTM B729, B464, B366, B463, B473, B462, A182, A351, ASTM A743
- ASME SB729, SB464, SB366, SB473, SB462,SA 182, SA351
- ANSI / ASTM A555-79
- EN 2.4660
- UNS N08020
- Werkstoff 2.4660
- Castings are designated CN7M
Sheng He Pipe Industry offers Alloy 20 in a variety of forms, including:
- Pipe & Welded pipe
- Pipe fittings
- Seamless tube & Welded tube
- Flanges
- Bar
- Sheet
- Wire
- Plate
- Forgings
- Weld Rod
ASTM Specifications
ASTM (American Society for Testing and Materials) for various products made out of Alloy 20 are as follow
| Pipe Seamless | Pipe Welded | Tube Seamless | Tube Welded | Sheet/Plate | Bar | Forging | Fitting | Wire |
| B729 | B464 | B729 | B468 | B463 | B473 | B462 | B366 | – |
Chemical Composition, %
| 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 |
| .07max | 2.0max | .045max | .035max | 1.0max |
Mechanical Properties
Annealed Material
| 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% | – |