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.
Applications include:
- Chemical and Allied Industries
- Processing of synthetic rubber, high-octane
gasoline, solvents, pharmaceuticals, and agrichemicals
|
Approximate Chemical Composition |
| Ni |
32-38% |
| Cr |
19-21% |
| Cu |
3-4% |
| Mo |
2-3% |
| Fe |
BAL |
| C |
0.07% max |
| DENSITY |
8.08 g/cm3 |
0.292 lb/in3 |
| MELTING POINT |
1425 oC |
2600 oF |
| COEFFICIENT OF EXPANSION |
14.69 µm/m °C
( 20 -
100°C) |
8.16 x 10-6 in/in
°F
( 70 - 212°F) |
| MODULUS OF RIGIDITY |
73.6 kN/mm2 |
10675 ksi |
| MODULUS OF ELASTICITY |
193 kN/mm2 |
27993 ksi |
| CONDITION OF
SUPPLY |
HEAT TREATMENT
(AFTER FORMING) |
| Annealed / Spring Temper |
Stress relieve at 250 - 530ºC (480 - 990ºF) for 1
hour and air cool. |
| CONDITION |
APPROX TENSILE
STRENGTH |
APPROX SERVICE
TEMPERATURE |
| Annealed |
|
| -200-+300 oC |
-330-+570 oF |
|
| Spring Temper |
| 1200-1800 N/mm2 |
174-261 ksi |
|
| -200-+300 oC |
-330-+570 oF |
|
