17-7PH sheet is a precipitation-hardening stainless steel known for its excellent combination of cường độ cao, chống ăn mòn tốt, and superior fatigue performance. It is widely used in aerospace, spring manufacturing, and high-performance structural components.

17-7PH is an austenitic-martensitic stainless steel that achieves high strength through xử lý nhiệt (precipitation hardening process).

1. Chemical Composition of 17-7PH Stainless Steel

The typical chemical composition is as follows:

Key Alloying Elements:

• crom (Cr): Provides corrosion resistance.

• Niken (TRONG): Stabilizes austenite and improves toughness.

• Aluminum (Al): Enables precipitation hardening and high strength.

2. Tính chất cơ học (Typical After Heat Treatment)

Sau khi xử lý nhiệt thích hợp (such as CH900 condition), 17-7PH sheet can achieve:

Actual values depend on the specific heat treatment condition (Condition A, TH1050, RH950, CH900, vân vân.).

3. Performance Characteristics

3.1 Cường độ cao

17-7PH offers significantly higher strength than standard austenitic stainless steels such as 304 hoặc 316 after aging treatment.

3.2 Excellent Fatigue Resistance

Due to its precipitation-hardening structure, it performs well in cyclic loading conditions.

3.3 Chống ăn mòn tốt

• Comparable to 304 stainless steel in many environments.

• Suitable for mild corrosive and atmospheric conditions.

3.4 Good Formability in Annealed Condition

In Condition A (ủ), the sheet can be formed and shaped before final hardening treatment.

3.5 Heat Treatment Flexibility

Multiple heat treatment conditions allow adjustment of:

• Sức mạnh

• độ dẻo dai

• 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:

• Aerospace structural components

• Aircraft springs and diaphragms

• High-performance fasteners

• Precision mechanical parts

• Industrial spring clips and washers

5. Comparison with Common Stainless Steels