Independence Tube

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CSA G40.21 50W (350W)
350W Tube Picture 2 350W Tube Picture 1

Independence Tube is now manufacturing cold-formed HSS tubing to the Canadian specification CSA G40.21 50W, or what is commonly referred to as 350W, in our Marseilles, Illinois division.

Comparison of ASTM A500 Grade C to CSA G40.21 50W Round Sections
Mechanical
Properties
ASTM A500
Grade C
CSA G40.21 50WO.D. ToleranceASTM A500
Grade C
CSA G40.21 50W
Yield Strength46,000 psi min50,000 psi min>1.9"-2.5" incl.+/-.75%+/-.020"
Tensile Strength62,000 psi min65,000 psi minOver 2.5"-3.5" incl.+/-.75%+/-.030"
Elongation in 2"21 min*22 min*Over 3.5"-5.5" incl.+/-.75%+/-.040"
 Over 5.5"+/-.75%+/-1%
Comparison of ASTM A500 Grade C to CSA G40.21 50W Square & Rectangular Sections
Mechanical
Properties
ASTM A500
Grade C
CSA G40.21 50WO.D. ToleranceASTM A500
Grade C
CSA G40.21 50W
Yield Strength50,000 psi min50,000 psi min>1.9"-2.5" incl.+/-.020"+/-.020"
Tensile Strength62,000 psi min65,000 psi minOver 2.5"-3.5" incl.+/-.025"+/-.030"
Elongation in 2"21 min*22 min*Over 3.5"-5.5" incl.+/-.030"+/-.040"
 Over 5.5"+/-1%+/-1%
 ASTM A500 Grade CCSA G40.21 50W
Wall Thickness+/-10%+10%/-5%
MassN/A+10%/-3.5%
Straightness (Max allowed)1/8" X length (in feet) divided by 51/8" X length (in feet) divided by 5
Squareness+/- 2 degrees+/- 2 degrees
350W Tube Picture 4 350W Tube Picture 3

NOTE: Tolerance includes allowance for convexity and concavity. For rectangular sections, the tolerance calculated for the larger flat dimension shall also apply to the smaller flat dimension. This tolerance shall be increased by 50% when applied to the smaller dimension for rectangular sections whose ratio of cross-sectional dimensions is between 1.5 and 3, and by 100% when this ratio exceeds 3.

Comparison of ASTM A500 Grade C to CSA G40.21 50W Square & Rectangular Sections
Twist - (max 3 feet of length)ASTM A500 Grade CCSA G40.21 50W
1.5 and under.050".050"
Over 1.5 - 2.5 incl..062".062"
Over 2.5 - 4.0 incl..075".075"
Over 4.0 - 6.0 incl..087".087"
Over 6.0 - 8.0 incl..100".100"
Over 8.0.112".112"
Corner Radii (Wall thickness in inches) MaximumPerimeter to 24" incl.Perimeter over 24"
To .109" incl.3t.218"-
Over .109" - .134" incl.3t.268"-
Over .134" - .156" incl.3t.312"-
Over .156" - .188" incl.3t.470"-
Over .188" - .250" incl.3t.625".750"
Over .250" - .313" incl.3t.785".940"
Over .313" - .375" incl.3t.938"1.125"
Over .375" - .500" incl.3t1.250"1.500"
Over .500"3t-3t
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