Block Steel Corp.
6101 Oakton St, Skokie, Illinois, 60077 2678 United States View map
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Aluminized Steel Products

Block Steel Corp. specializes in aluminized steel products. We are the largest aluminized steel distributer in the United States.  With more than 60 years of experience, our family business can meet the most demanding steel needs with quality products and excellent service. On average, our inventory is 25,000 tons. We can quickly fill your orders. We are a member of the Metal Service Centre Institute.

Product lines      

We have various kinds of aluminized steel. Our ASTM-A463 is hot-dipped and coated on both sides with an aluminum/silicon alloy coating. It has the surface characteristics of aluminum, but with the strength and lower cost of steel. It is up to 60 inches wide. It is available in the following grades: CS(A or B), DDS, EDDS, EDDS+, structural and HSLA. It has oiled, dry or chemically treated surfaces. ASTM-A463 comes in Type 1 and Type 2. Type 1 is hot-dip coated with an aluminum/silicon alloy that has between 5 per cent and 11 per cent silicon. Type 2 is hot-dipped coated with commercially pure aluminum. It is best used for items that need resistance to atmospheric corrosion.

We also have Type 1 409 and 439 stainless steel. The coating is Type 1 Aluminized. It contains approximately 91 per cent aluminum and 9 per cent silicon. This coating is metalurgically bonded to the steel. This makes the steel last longer.

We also have an inventory of hot-dipped galvanized steel.

Industries served

We are an approved vendor to most major automotive, appliance and HVAC manufacturers. Our steel is ideal for tailpipes and mufflers, industrial ovens, drying ovens, furnaces, water heaters, heaters and engine parts.   Our Type 2 ASTM-A463 steel is ideal for corrugated roofing or siding.

Manufacturing process

A full service centre, we also have a 72-inch slitter and two 60-inch multi-cut blanking cut-to-length lines. Our machines are equipped with multi-roll shape correction levellers. These flatten the steel and minimize burr.

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