ASTM A890/A890M
Standard Specification for Corrosion-Resistant Iron-Chromium-Nickel-Molybdenum
Duplex Stainless Steel (Austenitic/Ferritic) Steel Castings for General Applications
| Grade | Heat Treatment |
|---|---|
| 1A, 1B, 1C | Heat to a minimum temperature of 1900°F (1040°C), hold for sufficient time to uniformly heat the casting to the specified temperature, quench in water, or otherwise rapidly cool. |
| 2A | Heat to a minimum temperature of 2050°F (1120°C), hold for sufficient time to uniformly heat the casting to the specified temperature, quench in water, or otherwise rapidly cool. |
| 3A | Heat to a minimum temperature of 1950°F (1070°C), hold for sufficient time to uniformly heat the casting to the specified temperature, quench in water, or otherwise rapidly cool. |
| 4A | Heat to a minimum temperature of 2050°F (1120°C), hold for sufficient time to uniformly heat the casting to the specified temperature, water quench, or furnace cool to a minimum of 1850°F (1010°C) and hold for at least 15 minutes, then water quench or otherwise rapidly cool in lieu of water quenching. |
| 5A | Heat to a minimum temperature of 2050°F (1120°C), hold casting at temperature for sufficient time, furnace cool to 1910°F (1045°C), quench in water, or otherwise rapidly cool. |
| 6A | Heat to a minimum temperature of 2010°F (1100°C), hold for sufficient time to uniformly heat the casting to the specified temperature, quench in water, or otherwise rapidly cool. |
| Grade | Type | UNS | ACI | C, max | Mn, max | Si, max | P, max | S, max | Cr | Ni | Mo | Cu | W | N |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1A | 25Cr-5Ni-Mo-Cu | J93370 | CD4MCu | 0.04 | 1.00 | 1.00 | 0.040 | 0.040 | 24.5-26.5 | 4.75-6.00 | 1.75-2.25 | 2.75-3.25 | … | 0.10-0.25 |
| 1B | 25Cr-5Ni-Mo-Cu-N | J93372 | CD4MCuN | 0.04 | 1.00 | 1.00 | 0.040 | 0.040 | 24.5-26.5 | 4.70-6.00 | 1.70-2.30 | 2.70-3.30 | … | 0.22-0.33 |
| 1C | 25Cr-6Ni-Mo-Cu-N | J93373 | CD3MCuN | 0.030 | 1.20 | 1.10 | 0.030 | 0.030 | 24.0-26.7 | 5.60-6.70 | 2.90-3.80 | 1.40-1.90 | … | 0.10-0.30 |
| 2A | 24Cr-10Ni-Mo-N | J93345 | CE8MN | 0.08 | 1.00 | 1.50 | 0.040 | 0.040 | 22.5-25.5 | 8.00-11.00 | 3.00-4.50 | … | … | … |
| 3A | 25Cr-5Ni-Mo-N | J93371 | CD6MN | 0.06 | 1.00 | 1.00 | 0.040 | 0.040 | 24.0-27.0 | 4.00-6.00 | 1.75-2.50 | … | … | 0.15-0.25 |
| 4A | 22Cr-5Ni-Mo-N | J92205 | CD3MN | 0.03 | 1.50 | 1.00 | 0.040 | 0.020 | 21.0-23.5 | 4.50-6.50 | 2.50-3.50 | 1.00 max | … | 0.10-0.30 |
| 5A | 25Cr-7Ni-Mo-N | J93404 | CE3MN | 0.03 | 1.50 | 1.00 | 0.040 | 0.040 | 24.0-26.0 | 6.00-8.00 | 4.00-5.00 | … | … | 0.10-0.30 |
| 6A | 25Cr-7Ni-Mo-N | J93380 | CD3MWCuN | 0.03 | 1.00 | 1.00 | 0.030 | 0.025 | 24.0-26.0 | 6.50-8.50 | 3.00-4.00 | 0.50-1.00 | 0.50-1.00 | 0.20-0.30 |
| Grade | Type | Tensile Strength, ksi [MPa], min | Yield Strength (0.2% offset), ksi [MPa], min | Elongation (2 in. or 50 mm), %, min |
|---|---|---|---|---|
| 1A | 25Cr-5Ni-Mo-Cu | 100 [690] | 70 [485] | 16 |
| 2A | 24Cr-10Ni-Mo-N | 95 [655] | 65 [450] | 25 |
| 3A | 25Cr-5Ni-Mo-N | 95 [655] | 65 [450] | 25 |
| 4A | 22Cr-5Ni-Mo-N | 90 [620] | 60 [415] | 25 |
| 5A | 25Cr-7Ni-Mo-N | 100 [690] | 75 [515] | 18 |
| 6A | 25Cr-7Ni-Mo-N | 100 [690] | 65 [450] | 25 |
| 1B | 25Cr-5Ni-Mo-Cu-N | 100 [690] | 70 [485] | 16 |
| 1C | 25Cr-6Ni-Mo-Cu-N | 100 [690] | 65 [450] | 25 |
This info source from website, for your reference only. Any casting of this material you can contact Leesh info@leesh.cn, for more support, thanks.
