- Description
17-4PH Stainless Steel Plate Complete Guide: Traitement thermique, Propriétés mécaniques & Applications industrielles
17-4PH stainless steel plate (également connu sous le nom UNS S17400 / 630 acier inoxydable) est un precipitation-hardening martensitic stainless steel widely used in applications requiring a combination of haute résistance, bonne résistance à la corrosion, and dimensional stability.
Il est couramment utilisé dans defense systems, nuclear components, aerospace structures, équipement chimique, and high-load mechanical parts.
1. What is 17-4PH Stainless Steel?
| Propriété | Description |
|---|---|
| Steel type | Precipitation-hardening stainless steel |
| UNS designation | S17400 |
| Equivalent grade | 630 acier inoxydable |
| Main alloying elements | Cr, Dans, Cu |
The strengthening mechanism is based on durcissement par précipitation (aging process), which allows very high mechanical strength after heat treatment.
2. Traitement en solution + Aging Process
17-4PH performance is controlled by two key steps: traitement en solution et vieillissement.
- Traitement en solution: dissolves alloying elements into a uniform structure
- Aging treatment: precipitates strengthening phases to increase strength
| Condition | Mechanical Behavior |
|---|---|
| Solution traitée | Doux, good machinability |
| H900 | Maximum strength condition |
| H1025 | Force et ténacité équilibrées |
| H1150 | Une ténacité plus élevée, reduced hardness |
3. Mechanical Properties Overview
- Very high tensile strength after aging
- Good corrosion resistance in moderate environments
- Excellent dimensional stability after heat treatment
- Good fatigue resistance for cyclic loading
| Condition | Strength Level |
|---|---|
| Solution traitée | Faible |
| H900 | Très élevé |
| H1025 | Haut (balanced) |
| H1150 | Modéré (toughness optimized) |
4. 17-4PH vs 630 Acier inoxydable
17-4PH and 630 stainless steel refer to the same material system, with different naming conventions used across industries.
| Designation | Usage Context |
|---|---|
| 17-4PH | Common industrial / aerospace naming |
| 630 (UNS S17400) | Standardized metallurgical designation |
5. Applications typiques
| Industrie | Exemples d'application |
|---|---|
| Aérospatial | Composants structurels, support brackets |
| Défense | Ensembles mécaniques à haute résistance |
| Nuclear industry | Critical load-bearing components |
| Machines industrielles | Arbres, gears, high-load parts |
6. Considérations relatives au traitement
- Machining is easier in solution-treated condition
- Aging should be performed after final shaping
- Heat treatment must be tightly controlled for consistency
- Welding requires careful procedure control
7. Capacité d’approvisionnement en acier inoxydable de Teda Ganghua
À Teda Ganghua, we supply high-quality 17-4PH stainless steel plates (630 grade) with stable precipitation-hardening performance. Our materials are widely used in aerospace, nuclear engineering, and high-strength industrial systems.
We provide precision cutting, heat-treatment coordination, and customized fabrication services to meet strict engineering requirements for global customers.
Découvrez nos produits en acier inoxydable ici:
Produits en tôle d'acier inoxydable
Conclusion
17-4PH stainless steel plate is one of the most important precipitation-hardening alloys in modern engineering. With excellent strength, bonne résistance à la corrosion, and controllable heat treatment states, it is widely used in aerospace, nuclear, and high-performance industrial applications.
