Steel coil slitting is a metal cutting process where large rolls or coils of sheet metal are cut using very sharp rotary blades. To achieve straight lines, they are cut length-wise into the large coil, creating narrower strips. Circular blades are responsible for making the cuts as the coil runs through the slitter. These are known as “knives” and can be moved to provide for varying widths. The slit pieces are cut at a smaller width whilst retaining the same length. Prior to being slit, the original coils are placed on an uncoiler drum for uncoiling, before being flattened on a leveler ready for slitting. Stainless steel can be slit into many different widths. Every application requires its own stainless steel coil slitting capability.
Slitting can be used equally well for both sheet and stainless steel slit coil. Every job requires that the blades are designed for the job at hand. Precision is the name of the game when it comes to steel coil slitting.
Characteristics of SS 430 Slitting Coils
The high chromium content of Stainless Steel 430 Slitting Coils offers great resistance to corrosion, especially under normal atmospheric conditions. It is able to form passivized chromium oxide barriers, which are both tough and durable. And its high chromium content allows the 430 grade to self-renew this thin protective layer particularly fast. SS 430 Slitting Coils are ductile, and are fabricated by bending, pressing, drawing, and heading.
SS 430 Slitting Coils resists chloride-induced stress corrosion cracking better than much ferritic steel. It also holds up well against corrosion in the presence of dilute organic acids and many alkalis. It also shows resistance to nitric acid well, making it ideal for some chemical applications.
Stainless Steel 430 Slitting Coils are best suited for mild corrosive conditions. 430 stainless steel is significantly less expensive than 316 without molybdenum or nickel additions. This makes 430 Slitting Coils a good value choice for non-critical indoor environments. 430 stainless steel offers good resistance to oxidation even in elevated temperatures.
Hot & Cold Working with 430 Stainless Steel Slitting Coils
SS 430 Slitting Coils can be hot worked in the temperature range of 1500 to 1900 degrees F. Once it has reached a uniform temperature, it can be fabricated by methods such as forging. The 430 grade is susceptible to excessive grain growth if exposed to high temperatures for too long, which reduces ductility. It should be air-cooled quickly to room temperature. Slow cooling at less than 1000 degrees F can cause embrittlement. Stainless Steel 430 does not harden when heat treated, remaining ductile.
Applications of Stainless Steel 430 Slit Coils
SS 430 also offers great strength and has a pleasing finish, which is simple to maintain and at a low cost. This is why stainless steel 430 is often chosen for its aesthetic quality over its resistance to corrosion.
Stainless Steel 430 Slit Coils are used in many diverse applications. These include Dairy equipment, Cooling coils cryogenic vessels, Sanitary fittings and valves, Chemical equipment, Coal hopper linings, Oil well filter screens, Shipping drums, Beer barrels, Pressure vessels, Evaporators, Furnace parts, Automotive trim and molding, Kitchen trim and equipment, Television cones, Tobacco machinery, Builders hardware, Zippers, Tubing, and more.
