Alloy 20 Stainless Steel Plate Manufacturer & Supplier
Alloy 20 (Carpenter 20Cb-3) is a niobium-stabilised, copper-bearing austenitic designed specifically for hot sulphuric acid. It bridges the gap between stainless steels and nickel alloys in acid service.
UNS: N08020 | Category: Super Austenitic & High Alloy Stainless
Size Range
Outer Diameter: Thickness 3 - 50 mm · Width 1000-3000 mm · Length 2000-12000 mm
Wall Thickness: 3 - 50 mm
Chemical Composition (%)
| C | Si | Mn | P | S | Cr | Ni | Mo | Cu | Nb |
|---|---|---|---|---|---|---|---|---|---|
| 0.07 max | 1.00 max | 2.00 max | 0.045 max | 0.035 max | 19.00-21.00 | 32.00-38.00 | 2.00-3.00 | 3.00-4.00 | 8 x C min, 1.00 max |
Mechanical Properties
- Yield Strength Rp0.2
- 240 MPa min
- Tensile Strength Rm
- 551 MPa min
- Elongation A5
- 30% min
- Hardness
- 217 HB max
Applicable Standards
- ASTM A240 / ASME SA240 (plate, sheet, strip)
- ASTM A480 (general requirements)
- EN 10088-2 (corrosion resisting sheet & plate)
- EN 10028-7 (pressure purposes)
- JIS G4304 / G4305
- EN 10204 3.1 certification
Applications
- Sulphuric acid tanks & piping spools
- Pickling equipment
- Pharmaceutical reactors
- Synthetic rubber plant equipment
- Acid mixing vessels
Industries Served
- Chemical & Petrochemical
- Pharmaceutical
- Fertilizer
Equivalent Grades
- UNS
- N08020
- EN
- 2.4660 / NiCr20CuMo
- Trade
- Alloy 20Cb-3