ASTM A500 structural pipe is a standard specification for cold-formed welded structural tubing produced to round nominal pipe sizes. ASTM A500 is the most common specification in North America for Hollow Structural Sections. Since ASTM A500 is a structural specification, round pipe HSS produced to this specification is a fit for applications being used in structural applications and general construction use. The tolerances of A500 are tighter than those of A53, therefore the A500 round pipe HSS has more quality and less variability than A53. Round HSS pipe has a superior surface finish and does not come with a lacquer coating. A500B Structural Pipe is manufactured for use in applications that demand greater strength, closer tolerances, and a superior finish. This product is an excellent choice for painted applications.
ASTM A500 structural pipe is welded pipe sized tubing made from flat-rolled steel, formed through a roller system and welded using electric-resistance welding. Longitudinal butt joints of welded tubing shall be welded across its thickness in such a manner as to assure the structural design strength of the tubing section. Welded structural steel pipe is normally furnished without the removal of inside flash.
HSS has a high strength-to-weight ratio, excellent compression support characteristics and excellent torsional resistance.
In exposed applications, especially Architecturally Exposed Structural Steel (AESS) applications in construction, HSS provides preferred visual opportunities for the design of buildings and other structures.
HSS provides uniformity of size, shape, strength and tolerances that make its use totally predictable, especially important for demanding OEM applications.
HSS can be readily bent, formed, punched and drilled. Improvements in connection design for fastening HSS to itself or other structural materials are improving the ease of fabrication in the field as well
Due to its higher strength ratio, especially in A1085, HSS is cost competitive with other structural materials. With improved connection and fastening methods, it often enjoys a cost advantage.
HSS is fire resistant and does not warp, twist, split, swell or shrink.
It resists dry rot and mildew.
|Grade A||Grade B||Grade C||Grade D|
|Tensile Strength (min. PSI)||45,000||58,000||62,000||58,000|
|Yield Strength (min. PSI)||33,000||42,000||46,000||36,000|
|Elongation in 2 inch (min. %)||25*||23**||21***||23**|
|*Applies to specified wall thicknesses (t) equal to or greater than 0.120". For lighter specified wall thicknesses, the minimum elongation values shall be calculated by the formula: % elongation in 2" = 56t+17.5, rounded to the nearest percent.|
|** Applies to specified wall thicknesses (t) equal to or greater than 0.180". For lighter specified wall thicknesses, the minimum elongation values shall be calculated by the formula: % elongation in 2" = 61t+12, rounded to the nearest percent.|
|*** Applies to specified wall thicknesses (t) equal to or greater than 0.120". For lighter specified wall thicknesses, the minimum elongation values shall be by agreement with the manufacturer.|
|Typical Chemical Properties|
|Chemistry (%)||ASTM A500|
|Grades A, B & D||Grade C|
|Heat Analysis||Product Analysis||Heat Analysis||Product Analysis|
|Carbon*||0.26 Max||0.30 Max||0.23 Max||0.27 Max|
|Manganese*||1.35 Max||1.40 Max||1.35 Max||1.40 Max|
|Phosphorus||0.035 Max||.045 Max||0.035 Max||0.035 Max|
|Sulphur||0.035 Max||.045 Max||0.035 Max||0.045 Max|
|Copper**||0.20 Min||0.18 Min||0.20 Min||0.18 Min|
|*For each reduction of 0.01 percentage point below the specified maximum for carbon, an increase of 0.06 percentage point above the specified maximum for manganese is permitted, up to a maximum of 1.50% by heat analysis and 1.60% by product analysis|
|**If copper containing steel is specified in the purchase order|