17 4 Лист из нержавеющей стали Ph
17-4 PH stainless steel sheet is a high-performance precipitation-hardening alloy that combines excellent strength, твердость, и коррозионная стойкость. Its unique chemical composition allows heat treatment to significantly enhance mechanical properties, making it suitable for aerospace, energy equipment, marine engineering, и промышленное оборудование. With multiple equivalent international grades and similar precipitation-hardening alloys available, 17-4 PH remains one of the most widely used high-strength stainless steel materials.
- Описание
17-4 PH stainless steel sheet is a precipitation-hardening martensitic stainless steel known for its высокая прочность, excellent hardness, и хорошая коррозионная стойкость. The designation “17-4” refers to the approximate chemical composition of 17% хром и 4% никель, пока PH stands for precipitation hardening.
This material is widely used in industries that require strong mechanical performance combined with corrosion resistance, including aerospace, энергия, marine engineering, and precision mechanical equipment. Compared with conventional austenitic stainless steels, 17-4 PH provides significantly higher strength after heat treatment while maintaining good toughness.
Химический состав 17-4 PH Stainless Steel
The alloy composition of 17-4 PH stainless steel is designed to provide precipitation hardening capability and improved mechanical performance.
| Элемент | Типичный контент (%) |
|---|---|
| Хром (Кр) | 15.0 – 17.5 |
| Никель (В) | 3.0 – 5.0 |
| Медь (Cu) | 3.0 – 5.0 |
| Ниобий + Tantalum (Нб + Ta) | 0.15 – 0.45 |
| Углерод (С) | ≤ 0.07 |
| Марганец (Мин.) | ≤ 1.0 |
| Кремний (И) | ≤ 1.0 |
| Железо (Фе) | Баланс |
Добавление copper and niobium enables precipitation hardening during heat treatment, which significantly increases strength and hardness.
Механические свойства
После правильной термической обработки, 17-4 PH stainless steel sheet achieves high mechanical strength while maintaining corrosion resistance.
| Свойство | Типичное значение |
|---|---|
| Предел прочности | 1000 – 1300 МПа |
| Предел текучести | 800 – 1100 МПа |
| Твердость | 28 – 40 СПЧ |
| Плотность | 7.75 г/см³ |
| Elastic Modulus | 200 ГПа |
The exact mechanical properties depend on the heat treatment condition, широко известный как H900, H1025, H1075, or H1150.
Key Material Characteristics
17-4 PH stainless steel sheets offer several important performance advantages:
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High strength and hardness after precipitation hardening
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Good corrosion resistance in atmospheric and mild chemical environments
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Отличная усталостная стойкость
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Good mechanical stability under high stress
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Suitable for machining and precision manufacturing
Из-за этих характеристик, 17-4 PH is often used when traditional stainless steels cannot provide sufficient strength.
Общие применения 17-4 PH Stainless Steel Sheets
The high strength and durability of this alloy make it suitable for demanding industrial environments.
Аэрокосмическая промышленность
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Элементы конструкции самолета
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Turbine parts
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Aerospace fasteners
Energy and Power Equipment
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Pump shafts
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Valves and fittings
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Turbine blades
Морская инженерия
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Marine hardware components
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Offshore equipment parts
Industrial Machinery
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High-strength mechanical components
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Precision shafts
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Industrial tooling
Heat Treatment Conditions
The performance of 17-4 PH stainless steel depends largely on precipitation hardening heat treatment.
| Heat Treatment Condition | Характеристики |
|---|---|
| H900 | Highest strength and hardness |
| H1025 | Balanced strength and toughness |
| H1075 | Improved ductility |
| H1150 | Maximum toughness and corrosion resistance |
Different heat treatment conditions are selected depending on the mechanical requirements of the application.
Equivalent and Similar Grades
Several international standards define equivalent grades for 17-4 PH нержавеющая сталь.
| Стандартный | Equivalent Grade |
|---|---|
| АСТМ / АИСИ | 17-4 PH |
| НАС | S17400 |
| В | 1.4542 |
| ОТ | X5CrNiCuNb16-4 |
These designations refer to the same precipitation-hardening stainless steel alloy used in different international standards.
Similar Stainless Steel Materials
Some other precipitation-hardening stainless steels offer similar performance characteristics.
| Марка материала | Характеристики | Typical Difference |
|---|---|---|
| 15-5 PH | Similar strength with improved toughness | More uniform microstructure |
| 13-8 Мо | High strength and excellent toughness | Better stress corrosion resistance |
| 17-7 PH | High fatigue resistance | Often used in spring applications |
| 410 Нержавеющая сталь | Мартенситная нержавеющая сталь | Более низкая коррозионная стойкость |
These materials are selected depending on the required balance of strength, коррозионная стойкость, и механические характеристики.
