| Standard: | ASTM B729/ASME SB729 | Material Grade: | ALLOY20 (NO8020 / 2.4660 ) |
|---|---|---|---|
| Surface: | Pickled And Annealed， Bright Annealed， Polished | Type Of Tube: | Straight Tube |
| Alloy Or Not: | Nickel Alloy | Special Type: | Thick Wall Pipe |
| High Light: | Seamless Hastelloy Pipe， Hastelloy Seamless Nickel Alloy Pipe， Bright Annealed Alloy Steel | ||
ASTM B729 ALLOY 20 / UNS NO8020 HASTELLOY 100% ET HT
TONG CHUANG GROUP deal with Stainless/Duplex/ Nickel steel and tube already more than 10 years， every year sell more than 80000 tons of Stainless/Duplex/ Nickel steel and tube. Our client already cover more than 45 countries. Our Stainless Steel and tube was width used in Mining， Energy， Petrochemical， Chemical Industry， Food plant， Paper plant， Gas and Fluid Industry etc.
ASTM B729: Standard Specification for Seamless Nickel-Iron-Chromium-Molybdenum-Copper Nickel Alloy Pipe and TubeThis
specification covers UNS N08020， UNS N08026 and UNS N08024 nickel-alloy seamless， cold-worked or hot-finished pipe and tube intended for general corrosive service. The product of UNS N08020 alloy， UNS N08026 alloy， and UNS N08024 alloy shall be furnished in the stabilized-annealed condition， solution-annealed condition， and annealed condition， respectively. The tensile strength， yield strength， and elongation requirements are specified. Hydrostatic and nondestructive electric tests shall be conducted on the each pipe or tube.
What is Alloy 20?
Alloy 20 was designed specifically to withstand sulfuric acid. Its nickel， chromium， molybdenum and copper levels all provide excellent general corrosion resistance. Restricted carbon plus columbium stabilization permits welded fabrications to be used in corrosive environments， normally without post-weld heat treatment. At 33% nickel， Alloy 20 has practical immunity to chloride stress corrosion cracking. This alloy is often chosen to solve SCC problems， which may occur with 316L stainless.
Niobium stabilized Alloy 20 Pipe is also referred to as carpenter 20 or known by its trade name UNS N08020. Developed to exhibit good corrosion resistance properties， the Carpenter Alloy is an alloy which has exceptional resistance to sulfuric acid. The content of copper added to the Alloy 20 is what protects this metal grade against sulfuric acid. Hence， the Carpenter 20 Pipe UNS N08020 Pipe finds use in key industrial sectors such as chemical， petrochemical， power generation， as well as the plastic industries
Characteristics of Alloy 20
- Excellent resistance to chloride stress corrosion cracking
- Excellent mechanical properties and fabricability
- Minimal carbide precipitation during welding
- Excellent in resisting corrosion to hot sulfuric acid
Performance of Alloy 20
- Excellent resistance to sulfuric acid corrosion
- Good resistance to chloride stress corrosion cracking
- Excellent mechanical and processing performance
- Minimal precipitation of carbides during welding process
- Heat resistant sulfuric acid corrosion
Alloy 20 Mechanical Properties
Density | Melting Range | Yield Stress (0.2%Offset) | Tensile Stress | Elongation |
8.1 g/cm3 | 1443 °C (2430 °F) | Psi – 35000 ， MPa – 241 | Psi – 80000 ， MPa – 551 | 30 % |
B729 Alloy 20 Chemical Composition
Ni | C | Mo | Mn | Si | Fe | Cu | S | P | Cr |
32 – 38 | 0.02 max | 2 – 3 | 1 – 2 | 0.7 max | Bal | 3 – 4 | 0.005 max | 0.02 max | 19 – 21 |
B729 Alloy 20 Equivalent
STANDARD | UNS | WERKSTOFF NR. | AFNOR | EN | JIS | BS | GOST |
Alloy 20 | N08020 | 2.4660 | Z2NCUD31-20AZ | NiCr20CuMo | – | – | – |
Application of Alloy 20
- Synthetic rubber production equipment
- Processing of pharmaceuticals， plastics， organic and chemical products
- Production equipment such as storage tanks， pipelines， heat exchangers， pumps， valves， etc
- Pickling equipment
- Chemical processing pipeline
- Bubble hood
- Petrochemical production equipment
- Production of food and dyes
