Similarly, the vendors that supply food manufacturers with equipment and tools, like Marlin Steel, need to make sure their equipment will contribute to and facilitate the adherence to those food safety regulations. In short, the food production and manufacturing industry relies on qualities of food grade stainless steel to ensure food safety and hygiene standards are met.
The alloy includes other metals, specifically nickel, and other elements like carbon. Specifically, in the food industry, stainless steel is exposed to heat, water, and harsh cleaning chemicals. Finally, the heat resistance of the metal means it can be exposed to extreme temperatures without risking damage. For those reasons, many food makers use stainless steel metal trays in their food-making processes. However, what some might not realize is that not just any type of stainless steel will do.
There are hundreds of different varieties of stainless steel on the market, each one with its own unique combination of properties.
Which stainless steel is best depends on the specific application. For example, a confectioner manufacturing chocolates is going to have very different performance needs than a processor specializing in tomato sauce. Grade stainless is an austenitic stainless steel alloy with a high chromium and nickel content. What makes the grade alloy an ideal food grade steel sheet material is the fact that it has a high resistance to acids, alkalis, and chlorides such as salt.
One weakness of stainless steel is its susceptibility to pitting, localized areas of corrosion, due to exposure to high chloride solutions or saline environments. As little as 25 ppm of chlorides can cause pitting corrosion to begin. The most basic difference between grade and grade stainless steels is that tends to have more nickel and a bit of molybdenum in the mix. The general mechanical properties of the two metals are mostly comparable.
The increased nickel content and the inclusion of molybdenum allows for grade stainless steel to have better chemical resistance than stainless steel. However, the addition of nickel and molybdenum also makes grade a more expensive alloy than stainless steel per ounce of material.
Additionally, the melting point of grade stainless steel is a bit higher than that of grade Though the stainless steel alloy has a higher melting point, grade has a better resistance to chemicals and chlorides like salt than grade stainless steel.
When it comes to applications with chlorinated solutions or exposure to salt, grade stainless steel is considered superior. Due to the addition of molybdenum, grade stainless steel is more corrosion resistant than similar alloys, such as stainless steel. This reduces pitting from chemical environments and allows grade stainless steel to be used in highly acidic and caustic environments that would otherwise eat away at the metal.
For instance, grade stainless steel can withstand caustic solutions and corrosive applications such as vapor degreasing or many other parts cleaning processes. These properties also make grade stainless steel ideal for pharmaceutical and medical applications. Since sterilization processes in these industries combine both strong disinfectants and or with high temperatures to prevent contamination, a resistant alloy such as grade is ideal.
Seawater and salt air can be especially damaging to metals. Besides the rough environment of the sea and marine applications, chlorides, such as salt, can eat away at even the toughest metals. Salt will even compromise the protective oxide layer of grade stainless steel, resulting in rust. For marine applications, or processes involving chlorides, grade stainless steel is ideal.
Grade has especially better resistance to salt and chloride pitting. Pitting corrosion can occur when stainless steel alloys, such as grade stainless steel, come into contact with salt-rich sea breezes and seawater. Chloride resistant metals, like grade 16 stainless steel, are essential to use for naval applications or anything involved with chloride.
Grade stainless steel is both tough and versatile , which makes it ideal for custom wire baskets built to last for years of use. Grade is example of a ferritic stainless steel with added sulfur. Stainless steel is usually chosen for its corrosion resistant properties, but it is important to know that different grades provide different amounts of corrosion resistance.
Austenitic stainless steels generally provide the most corrosion resistance because of their high amounts of chromium. This makes grade an excellent choice when corrosion resistance is important. Grade is similar to grade , but it has molybdenum as part of its chemical makeup, further increasing its corrosion resistance. Ferritic stainless steels and martensitic are generally more affordable than austenitic stainless steel because they have less nickel and sometimes less chromium than austenitic stainless steels, which can result in a loss of corrosion resistance.
Duplex stainless steels can be used to avoid the stress corrosion cracking associated with austenitic stainless steels. If the stainless steel is going to be subjected to heat treatment, it is important to know how the various grades of stainless steel can be affected. For the most part, austenitic stainless steels and ferritic stainless steels are non-hardenable when heat treated. The heat treatable stainless steels are typically martensitic or precipitation hardened.
Examples of these are grade C and PH, respectively. Very high strengths can be achieved with martensitic stainless steels, like grade C; and precipitation hardened stainless steels, like grades PH and PH.
Austenitic stainless steels, such as grade , can provide high strengths as well, though not as high as the martensitic grades. Austenitic stainless steels also have more nickel than other stainless steels, so a grade like will have greater toughness and ductility than ferritic and martensitic stainless steels. Duplex stainless steels can provide ferritic stainless steel properties while still maintaining a ductility and a toughness close to austenitic stainless steels. Sometimes the best way to find out what grade of stainless steel should be used is to see what has been used in the past.
Here are some examples of where certain grades of stainless steel are used. Disclaimer: Please note this information is not to be used for design purposes, and in no event shall MSFFC be liable for any damages arising from the misuse of this information.
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