Introduction
S11793 00Cr17Mo is an austenitic stainless steel type that contains a high amount of chromium and molybdenum in its composition. This alloy is often offered in the form of hot rolled plates or cold-rolled sheets, and is also used for the production of welded pipes, rivets, and fasteners. The alloy is highly corrosion-resistant, and is therefore suitable for the production of wide variety of components across various industries including food processing, medical, and automotive.
Composition and Properties
The chemical composition of S11793 00Cr17Mo is outlined in the following table.
Element Content (%)
Carbon, C 0.07
Manganese, Mn 0.75
Silicon, Si 1.00
Nickel, Ni 3.50
Chromium, Cr 17.00
Molybdenum, Mo 1.00
Phosphorous, P 0.040
Sulfur, S 0.030
The alloy provides excellent toughness, ductility and corrosion resistance, due to its containing high amount of chromium and molybdenum. It is the chromium content that makes the material resistant to corrosion in both oxidizing and reducing acids such as nitric acid and hydrochloric acid. The molybdenum adds to the material’s high strength and resistance to pitting. The alloy is also iron-based, giving it good durability and machinability.
Applications
S11793 00Cr17Mo is used in various applications such as evaporators, tanks, condensers, and pumps in the food industry. It is also used in automotive parts such as wheel hubs and wheel covers. In the medical industry, this alloy is used to make medical devices such as implants and medical instruments. In the industrial sector, it is often used to make pressure vessels, heat exchangers, and chemical process vessels.
Heat Treatment
As with all stainless steel alloys, S11793 00Cr17Mo can be subjected to various heat treatments that can result in different levels of strength, ductility, and hardness. Common treatments include annealing, tempering, and hardening.
Annealing involves heating the alloy to temperatures ranging from 870°C to 930°C, followed by slow cooling or furnace cooling. This helps to improve the material’s corrosion resistance and its mechanical properties.
Tempering involves heating the alloy to temperatures between 400°C and 540°C, followed by slow cooling or air cooling. This helps to improve the alloy’s strength and hardness without compromising its ductility.
Hardening involves heating the alloy to temperatures between 850°C and 950°C, followed by oil or water quenching. This increases the material’s hardness, but can also increase its brittleness.
Manufacturing
S11793 00Cr17Mo can be manufactured by a few different processes, including forging, hot rolling, welding and forming.
Forging is a process that involves heating the alloy up and deforming it with hammers or other tools to form the desired shape.
Hot rolling is a process that involves heating the alloy up and then rolling it at room temperature to the desired thickness.
Welding is a process that involves melting the pieces of the alloy together and binding them with a filler material such as a wire or a rod.
Forming is a process that involves heating the alloy up and then forming it at room temperature to the desired shape.
Conclusion
S11793 00Cr17Mo is an austenitic stainless steel type that contains a very high amount of chromium and molybdenum. This alloy provides excellent toughnes
