Allentown Steel Fabricating Company
260 Race Street — Catasauqua, PA.  18032
Toll Free 1.800.529.3519 — Phone:610.264.2815 — Fax:610.264.7889


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Standard Structural Steels (USA)

Steels used for building construction in the US use standard alloys identified and specified by ASTM International. These steels have an alloy identification beginning with A and then two, three, or four numbers. The four-number AISI steel grades commonly used for mechanical engineering, machines, and vehicles are a completely different specification series.

The Standard Commonly Used Structural Steels are:

Carbon Steels
A36 - structural shapes and plate
A53 - structural pipe and tubing
A500 - structural pipe and tubing
A501 - structural pipe and tubing
A529 - structural shapes and plates

High Strength Low Alloy Steels
A441 - structural shapes and plates
A572 - structural shapes and plates
A618 - structural pipe and tubing
A992 - W shapes beams only
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Corrosion Resistant High Strength Low Alloy Steels
A242 - structural shapes and plates
A588 aka Cor-ten - structural shapes and plates

Quenched and Tempered Alloy Steels
A514 - structural shapes and plates
A517 - boilers and pressure vessels


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