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ASTM A500 Grade B Specifications

ASTM A500 is a standard specification for cold-formed welded and seamless carbon steel structural tubing in round, square and rectangular shapes.



Specifications: ASTM A500 Grade B
Applications: frames, roll cages, truck racks, trailers, railings, etc.
Workability: Easy to Weld, Cut, Form and Machine
Mechanical Properties: Brinell = 63, Tensile = 58,000 +/-,  Yield = 46,000 +/-


 
Typical Chemical Properties
  Grades A, B, and D – Heat analysis Grades A, B, and D – Product analysis Grade C – Heat analysis Grade C – Product analysis
Carbon, maximum % 0.26 0.3 0.23 0.27
Manganese, maximum % 1.35 1.4 1.35 1.4
Phosphorous, maximum, % 0.035 0.045 0.035 0.045
Sulfur, maximum, % 0.035 0.045 0.035 0.045
Copper, minimum (if Copper-containing steel is specified in the purchase order) % 0.2 0.18 0.2 0.18
 
Typical Mechanical Properties
Round Structural Tubing Grade A Grade B Grade C Grade D
Tensile Strength, Minimum, psi [Mpa] 45,000 [310] 58,000 [400] 62,000 [425] 58,000 [400]
Yield Strength, Minimum, psi [Mpa] 33,000 [230] 42,000 [290] 46,000 [315] 36,000 [250]
         
Shaped Structural Tubing Grade A Grade B Grade C Grade D
Tensile Strength, Minimum, psi [Mpa] 45,000 [310] 58,000 [400] 62,000 [425] 58,000 [400]
Yield Strength, Minimum, psi [Mpa] 39,000 [270] 46,000 [315] 50,000 [345] 36,000 [250]

Typical Permissible Variations in Wall Thickness
The minimum wall thickness at any point of measurement on the tubing shall be not more than 10% less than the specified wall thickness. The maximum wall thickness, excluding the weld seam of welded tubing, shall be not more than 10% greater than the specified wall thickness. For square and rectangular tubing, the wall thickness requirements shall apply only to the centers of the flats.


 

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