タイトルまたは説明

***4PH Stainless Steel ***4 Precipitation Hardening also known as Type **0 is a chromium-copper precipitation hardening stainless steel used for applications requiring height strength and a moderate level of corrosion resistance. High strength is maintained to approximately **0 degrees Fahrenheit (**6 degrees Celsius). General Properties Alloy ***4 PH is a precipitation hardening martensitic stainless steel with Cu and Nb/Cb additions. The grade combines high strength, hardness (up to **2�F / **0�C), and corrosion resistance. Mechanical properties can be optimized with heat treatment. Very high yield strength up to ********0 MPa (******0 ksi) can be achieved. The grade should not be used at temperatures above **2�F (**0�C) or at very low temperatures. It has adequate resistance to atmospheric corrosion or in diluted acids or salts where its corrosion resistance is equivalent to Alloy **4 or **0. Corrosion Resistance Alloy ***4 PH withstands corrosive attacks better than any of the standard hardenable stainless steels and is comparable to Alloy **4 in most media. If there are potential risks of stress corrosion cracking, the higher aging temperatures then must be selected over ***2�F (**0�C), preferably ***4�F (**0�C). ***2�F (**0�C) is the optimum tempering temperature in chloride media. ***4�F (**0�C) is the optimum tempering temperature in H2S media. The alloy is subject to crevice or pitting attack if exposed to stagnant seawater for any length of time. It is corrosion resistant in some chemical, petroleum, paper, dairy and food processing industries (equivalent to **4L grade).