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Square Steel Tube

Application: In Industrial Construction, Machinery/Rack/Container manufacturing

Specification: OD: 10mm*10mm ~ 500mm*500mm

                          WT: 0.5mm ~ 20mm

                          LENGTH: 0.3mtr ~ 18mtr

Standard: ASTM A500, ASTM A53, EN 10210, EN 10219, JIS G 3466, BS 1387, BS 6323.

Process Type: Hot Rolled/Hot Expanded, Electric Resistance/High Frequency

End: Square Cut, Burr Removed

Surface: Bare, Black Painting, Lightly Oiled

Packing: Waterproof Paper Wrapped, Steel Strips Bundled, Two Tags on Each Bundle

               

We stocks carbon steel square tubing in A513 (mechanical) and A500 (structural) grades, in a range of sizes and wall thicknesses. A500 structural carbon square tube is used in construction, buildings, towers, and sign support applications, but also in trailers and structural fabrications. A513 mechanical carbon steel square tube is frequently used in the automotive, solar, appliance, and agriculture industries, as well as in many other types of machinery ranging from bases to supports.  

All ODs below 2" with wall thickness less than 0.120 inch are typically manufactured as ASTM A-513. Sizes 2" and above with wall thickness of 0.120 inch and heavier are typically manufactured to ASTM A-500.


STRUCTURAL SQUARE AND RECTANGULAR TUBING TOLERANCES
 (ASTM A-500 GRADES A,B,C AND D)
Mechanical Properties
ASTM A500
Grade A Grade B Grade C Grade D
Tensile Strength (min. PSI) 45,000 58,000 62,000 58,000
Yield Strength (min. PSI) 39,000 46,000 50,000 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 Composition
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
Phosporus 0.035 Max 0.045 Max 0.035 Max 0.045 Max
Sulphur 0.035 Max 0.045 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