| GRADE: | ALLOY20 (NO8020 / 2.4660 ) | SURFACE: | Pickled And Annealed， Bright Annealed， Polished |
|---|---|---|---|
| STANDARD: | ASTM B729/ASME SB729 | PACKAGE: | BUNDLE，PLYWOOD CASE |
| High Light: | heat exchanger pipe， heat recovery pipe | ||
Hastelloy Pipe ASTM B729 ALLOY20 ，NO8020 / 2.4660，100% ET / HT/ UT
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. ANSI B16.10: B16.19 SCH 5S， SCH 10S， SCH 20， SCH 30， SCH 40S， SCH 60， SCH80S， XS， SCH 100， SCH 120， SCH160， XXS
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.
Chemistry
| 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 |
Specifications
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Inventory
Alloy 20 Coil， Alloy 20 Plate， Alloy 20 Sheet， Alloy 20 Weld Wire， Alloy20 Pipe ， Alloy20 Tube ， Alloy 20 Flange ， Alloy20 Fitting
Features
- Excellent resistance to hot sulfuric acid
- Resistant to intergranular corrosion in the as-welded condition
- Chloride stress corrosion cracking resistance
Applications
- Sulfuric acid pickling tanks， racks and heating coils
- Phosphate coating drums and racks
- Heat exchangers
- Bubble caps
- Process piping
- Mixing tanks
- Chemical and petroleum process equipment
Physical Properties
Density: 0.278 lb/in3 annealed
Melting Point: 2525-2630°F
Electrical Resistivity: 651 Ohm-circ mil/ft
| 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 | – | – | – | – | – | – |
* 70°F to indicated temperature.
Mechanical Properties
Minimum Specified Properties， Asme Sb-688 Plate
| Ultimate tensile strength， ksi | 80 |
| 0.2% yield strength， ksi | 35 |
| Elongation， % | 30 |
| Hardness MAX， Brinell | 217 |
Typical Tensile Properties， Bar
| Temperature， °F | 70 |
| Ultimate Tensile Strength， ksi | 91 |
| 0.2% Yield Strength， ksi | 48 |
| Elongation， % | 45 |
| Charpy Impact V-notch， ft-lbs | 200 |
