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ASTM A501 Grade B Square and Rectangular Tubing is furnished in sizes:
Square Tubing: OD: 1" x 1" - 32" x 32" x Thk.: 0.100" - 3.000" (25 x 25mm - 800 x 800mm x Thickness: 2.5 - 75 mm)
Rectangular Tubing: OD: 1" x 1.5" - 22" x 32" x Thk.: 0.100" - 3.000" (25 x 38mm - 500 x 800mm x Thickness: 2.5 - 75mm)
ASTM A501 Round Tubing is furnished in size:
OD: NPS 1/2" - NPS 24" (DN15 - DN 600 or 21.3 - 609.6mm) x Thickness: 0.109" to 1.000". (2.8 to 25.4 mm), dependent upon size.
Special Shape Tubing and tubing with other dimensions is permitted to be furnished, provided that such tubing complies with all other requirements of this specification.
ASTM A501 covers the following grades:
1. Grade A — 36,000 psi [250 MPa] min yield strength.
2. Grade B — 50,000 psi [345 MPa] min yield strength.
Equivalent Grades: EN 10219-1/EN 10210-1 S355, ASTM A500 Gr.B, GB/T 3091 Q355B, JIS G3444/3466 STK/STKR490
Square Structural Tubing can be also called Square Hollow Section/SHS
Rectangular Structural Tubing can be also called Rectangular Hollow Section/RHS
Round Structural Tubing can be also called Circular Hollow Section/CHS
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