Source 21, Inc.


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Our Line Card

301 / 302 / 304 / 304L / 305 
300 Series stainless steels are classified as austenitic, and are hardenable only by cold working methods. These grades of stainless have chromium (approx. 18 to 30%) and nickel (approx. 6 to 20%) as their major alloying additions. Type 304  is the most widely used alloy of all stainless steels. 300 Series Stainless steel alloys resist corrosion, maintain their strength at high temperatures and are easy to maintain.​

Source 21  is a full line supplier and processer of stainless steel coil, sheet, plate, bar, and strip products.  We stock over 35 grades of stainless steel, including 300 and 400 series stainless, annealed and in various tempers and high temperature grades, for shipments worldwide.

420 Stainless / 420HC / 420J2
420 stainless steel is a high-carbon steel with a minimum chromium content of 12%. Like any other stainless steel, grade 420 can also be hardened through heat treatment. It offers good ductility in its annealed state and excellent corrosion resistance properties when the metal is polished, surface grounded or hardened. This grade has the highest hardness - 50HRC - among all the stainless steel grades with 12% chromium.

410 Stainless
Stainless steel 410 is a basic martensitic grade which contains 11.5% chromium, offering both exceptional wear and corrosion resistance. SS 410 is corrosion resistant to some chemicals, food, mild acids, water, and air. It also proves adequate resistance to nitric acid, concentrated sulfuric acid, dilute acetic acid and naphtha. Elevated mechanical properties and corrosion resistance are achieved with stainless steel 410 when it's hardened and tempered. 
316 / 316L / Annealed +Tempered


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