17-7PH Stainless Steel Plate&Sheet
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Gnee Super Alloy (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of 17-7ph stainless steel plate&sheet in China. If you're going to wholesale high quality 17-7ph stainless steel plate&sheet made in China, welcome to get free sample from our factory. Good service and reasonable price are available.
Alloy 17-4PH is a precipitation hardening martensitic stainless steel with Cu and Nb/Cb additions. The grade combines high strength, hardness (up to 572°F /300°C), and corrosion resistance. Mechanical properties can be optimized with heat treatment. Very high yield strength up to 1100-1300 MPa (160-190 ksi) can be achieved.
The corrosion resistance of Alloy 17-4PH is comparable to 304 stainless steel in most environments, and is generally superior to the 400 series stainless steels. It is used in applications where the combination of moderate corrosion resistance and unusually high strength are required. Alloy 17-4PH has corrosion resistance comparable to 304L in some chemical, dairy, food, paper and petroleum applications.
Alloy 17-4PH in the solution-annealed condition (Condition A) should not generally be put in service. The alloy is subject to brittle fractures and more sensitive to chloride stress corrosion cracking than the aged material.
| Property | Value | Unit |
|---|---|---|
| Density | 0.280 | lbs/in³ |
| 7.75 | g/cm³ | |
| Specific Heat | 0.11 | BTU/lb-°F @ 70°F |
| 460 | J/kg-°C @ 20°C | |
| Modulus of Elasticity | 28.5 x 10^6 | psi |
| 196 | GPa | |
| Thermal Conductivity | 10.6 | BTU/hr/ft²/ft/°F |
| 18.3 | W/m-°K | |
| Melting Range | 2560 – 2625 | °F |
| 1404 – 1440 | °C | |
| Electrical Resistivity | 29.5 | Microhm-in at 75°C |
| 75 | Microhm-cm at 24°C |
If risks of chloride stress corrosion cracking are present the higher aging temperatures should be selected over 1022°F (550°C), preferably 1094°F (590°C). 1022°F (550°C) is the recommended tempering temperature in chloride service. 1094°F (590°C) is preferred in H2S media.
Alloy 17-4PH is subject to crevice corrosion and pitting attack when exposed to stagnant seawater for a duration of time.
Aerospace: Used in various components such as aircraft structural parts, landing gear, and other high-stress components.
Automotive: Suitable for parts requiring high strength and resistance to fatigue and stress, such as springs and fasteners.
Industrial Equipment: Employed in equipment that operates in harsh environments, including chemical processing and food processing machinery.
Medical Devices: Used in medical implants and surgical instruments due to its biocompatibility and strength.
Fabrication:
Machining: Can be machined in its annealed state, but its hardness increases after heat treatment, which may require specialized tools.
Welding: Welding is possible but requires proper procedures to avoid degradation of mechanical properties. Pre-weld and post-weld heat treatments may be necessary.
Heat Treatment: Aging treatments are used to achieve specific mechanical properties. Common treatments involve heating the material to around 480-620°C (900-1150°F) and then cooling it at a controlled rate.
17-7PH stainless steel is favored for its combination of high strength, good corrosion resistance, and ability to maintain these properties over a range of temperatures. It is a versatile material suitable for demanding applications across various industries.
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