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Views: 2 Author: Wang Publish Time: 2024-08-16 Origin: Site
17-4 PH Stainless Steel is a precipitation hardening martensitic stainless steel. Typical usage is seen in applications requiring high strength and a modest level of corrosion resistance. Strength and toughness desired can be manipulated by temperate range in the heat treatment process. This grade of stainless steel has a typical density of 7.75kg/dm³ and can be magnetised. 17-4PH finds specific use in applications where a combination of unusually high strength and moderate corrosion resistance is a determining factor. The alloy has similar corrosion resistance characteristics when compared to 304 stainless steel.
17-4 stainless steel is a type of alloy that contains about 17% chromium and 4% nickel. This combination makes it ideal for use in high temperature applications – including within the gas, chemical, and aviation industries – because the alloy exhibits excellent corrosion resistance, mechanical properties, toughness, and strength even in temperatures up to 600 degrees Fahrenheit (316°C). It also has superior formability and weldability compared to other grades of stainless steel.
17-4 stainless steel, otherwise known as SAE Type 630, is frequently used with operations demanding high tensile strength and a middling level of corrosion resistance. 17-4 PH is the most-used grade of martensitic precipitation hardenable alloys and is regarded as the most broadly formed precipitation hardening grade. Its intense tensile strength keeps its ductility and hardness at high temperatures while still demonstrating exceptional corrosion resistance in all conditions. 17-4 stainless steel is a popular alloy, and for good reason: it offers excellent corrosion resistance, strength, and versatility. Whatever the application you need it for, JN Alloy can help ensure you have the right material for the job.
Carbon | 0.07% (Max) |
Silicon | 1.00% (Max) |
Manganese | 1.00% (Max) |
Phosphorous | 0.040% (Max) |
Sulfur | 0.030% (Max) |
Chromium | 15%-17.5% |
Molybdenum | 0.50% (Max) |
Nickel | 3%-5% |
Copper | 3%-5% |
Stainless steel 17-4PH can be machined in both conditions; means in solution annealed and aged conditions. Machining characteristics may vary according to the hardness. Hi speed tools are accepted, but carbide tools are preferred. Standard coolant should be used. Dimensional changes as a result of the heat treatment should be taken into account, if very stringent tolerances are required.
Stainless steel 17-4PH normally will be supplied in solution annealed condition. Mechanical properties may be achieved by subsequent age hardening treatments. These aging treatments are referred to H900, H1025, H1075, H1150, H1150M and H1150D. Between 1020°C and 1050°C the material 17-4 PH is solution-annealed. This is followed by a rapid cooling - water, oil or air. This depends on the cross-section of the material. To ensure complete conversion from an austenite to a martensite, the material must have the ability to cool down in room temperature.
The corrosion resistance of Stainless steel 17-4PH is comparable with AISI 304 stainless steel, but is in generell supirior to 400 series stainless steel. It is used in applications where the combination of moderate coirrosion resistance and unusual high strength are required. Alloy 17-4PH in condion A, should not generally put into service, the Alloy is subject to briddle fractures and more sensitive to chloride stress corrosion cracking than the aged Alloy.
The forging of the stainless steel 17-4PH takes place in a temperature range of 1180 ° C to 950 ° C. To ensure grain refining, the cooling to room temperature is done with air.
Before the material 17-4 PH can be welded, consideration must be given to the condition of the base material. In stable form, copper is present in the material. This promotes no hot cracking. To be able to do the welding optimum welding conditions are required. Undercuts or welding defects can lead to the formation of a notch. That should be avoided. To prevent the formation of stress cracks, the material must be subject again to solution annealing with subsequent aging within a very short time after welding. If no after-heat treatment takes place, the mechanical-technological values in the weld seam and the heat-affected zone to the base material can be very different.
Stainless steel is a primary material for creating different aircraft parts and components. The 17-4PH SS material offers good tensile strength and excellent stress corrosion resistance, which are crucial requirements when producing aerospace equipment. Moreover, it is critical that these parts and components perform well in different temperatures and environments. Therefore, 17-4PH is the ideal metal for the aerospace sector.
The 17-4PH SS exhibits high mechanical strength and superior resistance to corrosion required in marine applications. Its ability to resist corrosion ensures its survival in salty seawater. The high concentration of chromium element in its composition makes the 17-4PH stainless steel highly resistant to corrosive substances. Hence, it is well-suited for making vessel pump and valve components. Also, other components such as heat exchangers, seawater, and process piping are made with 17-4 PH.
This alloy has the high strength required in making pipes for extracting oil at great depths below sea level. In addition, the 17-4PH alloy is more corrosion-resistant in different environments. As such, it is suitable for making pipes and oil rigs in this industry since it can withstand corrosive media such as carbon dioxide, hydrogen sulfide gas, and low pH levels in oil prospecting conditions.
Most of the equipment used in the food processing industry is made from steel. The stainless steel 17-4ph is ideal for making food and beverage processing equipment because of its good surface condition and fine finish. The smooth surface and high chromium content of the 17-4 PH SS make it less prone to corrosion. At the same time, it promotes hygiene in food and beverage production since it is easy to clean.
The stainless steel 17-4ph is a versatile alloy commonly used in several applications because it is cost-effective and offers superior properties such as excellent strength and corrosion resistance. Therefore, knowing everything about the 17-4 PH stainless steel is crucial to achieving the best results when machining your products. JN Alloy is suppliers of stainless steel 17-4PH in sheet, pipes, flanges, pipes fittings, round bar, and plate stock in a variety of lengths and widths, and we can custom cut this material to your exact specifications.
