Alloy Wire International
Datasheet: Alloy 20 CB 3
Alloy 20 CB 3
Alloy 20 CB 3 is an austenitic stainless steel with excellent resistance to hot sulphuric acid and many other aggressive environments that would readily attack stainless steel 316. This alloy exhibits superior resistance to stress-corrosion cracking in boiling 20 to 40% sulphuric acid.
Available in all profile options
Key Features
Excellent resistance to hot sulphuric acid & many other aggressive environments that would attack ST/ST 316.
Superior resistance to stress corrosion cracking in boiling 20 – 40% sulphuric acid.
Typical Applications
Chemical and allied industries
Processing of synthetic rubber
High-octane gasoline
Solvents
Pharmaceuticals
Agrichemicals
Designations
W.Nr 2.4660
UNS N08020
AWS 130
Specifications
ISO 15156-3
(NACE MR 0175)
Chemical Composition
| Element | Min % | Max % |
|---|---|---|
| C | – | 0.07 |
| Si | – | 1.00 |
| Mn | – | 2.00 |
| P | – | 0.045 |
| S | – | 0.035 |
| Cr | 19.00 | 21.00 |
| Mo | 2.00 | 3.00 |
| Ni | 32.50 | 38.00 |
| Cu | 3.00 | 4.00 |
| Nb | 8 x C | 1.00 |
| Fe | bal |
Alloy Details
| Density | Melting Point | Coefficient of Expansion | Modulus of Rigidity | Modulus of Elasticity |
|---|---|---|---|---|
| 8.08 g/cm³ | 1425 °C | 14.69 μm/m °C (20 – 100 °C) | 73.6 kN/mm² | 193 kN/mm² |
| 0.292 lb/in³ | 2600 °F | 8.16 x 10-6 in/in °F (70 – 212 °F) | 10675 ksi | 27993 ksi |
Heat treatment of finished parts
| Condition as supplied by AWI | Type | Temperature | Time | Cooling |
|---|---|---|---|---|
| Annealed or Spring Temper | Stress Relieve | 250 – 530 °C (480 – 990 °F) | 1 Hr | Air |
Properties
| Annealed | ||
|---|---|---|
| Approx. tensile strength | <900 N/mm² | <131 ksi |
| Approx. operating temperature | -200 to +300 °C | -330 to +570 °F |
| Spring Temper | ||
|---|---|---|
| Approx. tensile strength | 1200 – 1800 N/mm² | 174 – 261 ksi |
| Approx. operating temperature | -200 to +300 °C | -330 to +570 °F |
The above tensile strength ranges are typical. If you require different please ask.
