Despite being one of the most versatile alloys around, the use of grade takes a hit due to the fact that it work hardens rather quickly. This is what the introduction of grade rectified. Hence, grade is referred to as the free-machining grade of stainless steel. Both alloys are classified under the austenitic class of stainless steel and, therefore will exhibit the same face centred cubic crystal microstructure.
Though the chemical composition of both alloys is similar to the other, the inclusion of elements like sulfur or selenium to the alloy of grade is what improves its machinability.
The inclusion or exclusion of elements in any alloy tends to change the properties of the material as a whole. So the inclusion of either sulfur or selenium in the alloy is known to reduce corrosion resistance properties of grade compared to What gives stainless steel grade excellent toughness properties is its microstructure. However, the addition of sulfur is also what lessens its toughness at a certain level. This is partially due to the high availability of the grade as well.
The grade is not as common as thee , so that the production is low in the material. This leads to the price difference in addition to the added materials such as selenium, titanium or increased sulfur.
The material has higher yield strength than the material. The has MPa minimum yield strength where the type has only about MPa yield strength. The tensile strength of the is about MPa where the tensile strength of the material is only around MPa.
These differences come with the compositional difference and these strength properties are useful in selection of the materials as well. As a common general-purpose metal, stainless steel is easy to be seen in our life and manufacturing industry. SS is widely used to make equipment and parts requiring good comprehensive performance corrosion resistance and formability , like industry, auto parts, household products, furniture decoration, agriculture, food, and medical industry.
The density of stainless steel is 7. The uses and applications of stainless steel machining parts are often determined by its properties and characteristics, which also influences the metalworking process on it. Understand the stainless steel properties, we can roughly know what environments and applications it can be used in, while when you want to choose a best material from all the stainless steel grades, you need to figure out what are the differences between them.
It also has excellent welding features. When welding thin parts, it does not require post-weld annealing. Level L, the low carbon version, does not need pre-weld annealing and is hence widely used in large gauge components more than 6mm. With its more extensive carbon content, Level H has used applications at high temperatures. Also, the austenitic form provides outstanding toughness to these levels. The austenitic structure also gives these grades excellent toughness, even down to cryogenic temperatures, even in very down to cryonic temperatures.
It contains selenium, making it easy to cut; on the other hand, is flexible stainless steel, that it does not include selenium. It is commonly used for producing well extensive performance Moldability and corrosion resistance material and machine parts.
Let speak in detail about the difference between and , from 4 points: alloy composition, mechanical properties, typical applications, and cost.
Typical compositional ranges for grade and stainless sheets of steel are given in this table:. The essential elements when using stainless steel in applications are weldability, heat treatment, and Machinability. Besides the fact that it is a free-cutting material, Level has the best Machinability of all the austenitic stainless steel. And the most crucial part is that is unweldable. Yet, type stainless steel is somewhat weldable.
Grade has huge weldability by all model fusion ways. With filler metals or without. AS Heavy soldered segments in class may need pre-solder annealing for the most significant corrosion resistance.
This is not needed for level L. Level may be used as a substitute if a massive section soldering is required, and pre-solder heat handling is impossible.
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