17-7PH
Description
Étendue de la fourniture du groupe Aviation :
Pièces forgées non standard, barres rondes, plaques d'acier, anneaux, tubes sans soudure
- 17-7PH introduction du matériel
17-7PH is an austenite-martensite precipitation hardened stainless steel developed based on 18-8CrNi, also known as controlled phase change stainless steel.
- Ingrédients chimiques
| alliage | C | Mn | Et | P | S | Cr | En | Al |
| 17-7ph | – | – | – | – | – | 16.0 | 6.50 | 0.75 |
| 0.09 | 1.0 | 1.0 | 0.04 | 0.03 | 18.0 | 7.75 | 1.50 |
- Propriétés physiques
| densité | 7.65g/cm3 |
| Point de fusion | 1415-1450℃ |
Mechanical properties of 17-7PH alloy at room temperature
| Jubao alloy | Résistance à la traction Rm N/mm2 |
Limite d'élasticité RP0,2N/mm2 |
Élongation A5 % |
Dureté Brinell HB |
| Solid melting 1000~1100℃ Quick cooling | ≤1030 | ≤380 | ≥20 | ≤229 |
| 565℃ vieillissement | ≥1140 | ≥960 | ≥5 | ≥363 |
| 510℃ vieillissement | ≥1230 | ≥1030 | ≥4 | ≥388 |
- Material properties
17-7PH is a hardened stainless steel with high strength and hardness, fatigue resistance, good corrosion resistance and die forging. After solid solution treatment, it is an unstable austenite structure with good plastic toughness and processability. After adjustment, the austenite precipitation of carbide phenol composition changes. After martensite transformation treatment, most of the structures are transformed into low-carbon tempered martensite with good toughness. This state is the use state of steel and has good medium-temperature mechanical properties. Corrosion resistance is better than general martensitic stainless steel.
- Application areas
Used in aerospace, chemical, petrochemical, papermaking and metal processing industries.
