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GUIDE TO SELECTION
Square & Rectangular Tubing
Fourtypesof square and rectangularcarbon steel tubingfor mechanical and structural applications are available.
STRUCTURAL ASTM A500-GRADE B (UNS K03000) cold formed, electric resistance welded tubing. Has a high strength-to-weight ratio, is relatively low in cost and is easily welded, formed, punched and drilled. The hollow shape offers good appearance and ease of maintenance. OD flash removed on all sizes. ID is flash-in. No identification color.
STRUCTURAL HIGH STRENGTH, LOW ALLOY (HSLA-70) tubing with 70,000 psi minimum yield. It has the same features and benefits of ASTM A500-Grade B, but with 527o higher strength-to-weight ratio. No color identification.
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Minimum |
Mechanical |
Properties |
|
|
|
Tensile Strength psi |
Yield Strength psi |
% Elong. in 2 |
|
ASTM A500-Grade B
ASTM A500-Grade C*
HSLA-70 |
58,000
62,000
75,000 |
46,000
50,000
70,000 |
23
21
14 |
•Material can be selected to meet these requirements.
MECHANICAL. An electric resistance welded tubing made from low carbon steel. Walls heavier than 18 ga. are produced from hot rolled steel, walls 18 ga. and lighter are cold rolled. Offers good surface finish and forming qualities. OD flash removed on all sizes. ID is flash-in. No color identification. Meets ASTM A513 Type 1 (HR) or Type 2 (CR).
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