17 7ph-Blatt
17-7PH sheet is a high-performance precipitation-hardening stainless steel containing chromium, Nickel, und Aluminium. Es bietet high tensile strength, excellent fatigue resistance, und gute Korrosionsbeständigkeit, especially after proper heat treatment.
This material is ideal for applications requiring Stärke, Haltbarkeit, and reliability under cyclic stress conditions.
- Beschreibung
17-7PH sheet is a precipitation-hardening stainless steel known for its excellent combination of hohe Festigkeit, gute Korrosionsbeständigkeit, and superior fatigue performance. Es wird häufig in der Luft- und Raumfahrt eingesetzt, spring manufacturing, and high-performance structural components.
17-7PH is an austenitic-martensitic stainless steel that achieves high strength through Wärmebehandlung (precipitation hardening process).
1. Chemische Zusammensetzung von 17-7PH Edelstahl
The typical chemical composition is as follows:
| Element | Inhalt (%) |
|---|---|
| Chrom (Cr) | 16.0 – 18.0 |
| Nickel (In) | 6.5 – 7.75 |
| Aluminium (Al) | 0.75 – 1.50 |
| Kohlenstoff (C) | ≤ 0.09 |
| Mangan (Mn) | ≤ 1.00 |
| Silizium (Und) | ≤ 1.00 |
| Phosphor (P) | ≤ 0.04 |
| Schwefel (S) | ≤ 0.03 |
| Eisen (Fe) | Gleichgewicht |
Key Alloying Elements:
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Chrom (Cr): Bietet Korrosionsbeständigkeit.
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Nickel (In): Stabilizes austenite and improves toughness.
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Aluminium (Al): Enables precipitation hardening and high strength.
2. Mechanische Eigenschaften (Typical After Heat Treatment)
Nach entsprechender Wärmebehandlung (such as CH900 condition), 17-7PH sheet can achieve:
| Eigentum | Typischer Wert |
|---|---|
| Zugfestigkeit | ≥ 1310 MPa |
| Streckgrenze | ≥ 1170 MPa |
| Verlängerung | ≥ 6% |
| Härte | Bis zu 44 HRC |
Actual values depend on the specific heat treatment condition (Zustand A, TH1050, RH950, CH900, usw.).
3. Leistungsmerkmale
3.1 Hohe Festigkeit
17-7PH offers significantly higher strength than standard austenitic stainless steels such as 304 oder 316 after aging treatment.
3.2 Ausgezeichnete Ermüdungsbeständigkeit
Due to its precipitation-hardening structure, it performs well in cyclic loading conditions.
3.3 Gute Korrosionsbeständigkeit
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Vergleichbar mit 304 Edelstahl in vielen Umgebungen.
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Suitable for mild corrosive and atmospheric conditions.
3.4 Gute Formbarkeit im geglühten Zustand
In Condition A (geglüht), the sheet can be formed and shaped before final hardening treatment.
3.5 Heat Treatment Flexibility
Multiple heat treatment conditions allow adjustment of:
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Stärke
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Zähigkeit
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Dimensional stability
4. Typical Applications of 17-7PH Sheet
Because of its high strength-to-weight ratio and fatigue resistance, 17-7PH sheet is commonly used in:
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Aerospace structural components
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Aircraft springs and diaphragms
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High-performance fasteners
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Präzisionsmechanische Teile
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Industrial spring clips and washers
5. Comparison with Common Stainless Steels
| Eigentum | 304 | 316 | 17-7PH |
|---|---|---|---|
| Stärke (Heat Treated) | Mäßig | Mäßig | Sehr hoch |
| Korrosionsbeständigkeit | Gut | Sehr gut | Gut |
| Ausscheidungshärtung | NEIN | NEIN | Ja |
| Fatigue Resistance | Mäßig | Mäßig | Exzellent |
