Comparison of ASTM A500 Grade C vs. CSA G40.21 50W

 

ASTM A500-01a

CSA G40.21 50W
Description:
 Standard Specificaion for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds ,Shapes. General requirements for Rolled or Welded Structural Quality Steel/Structural Quality Steel.
Intended Use: Welded, riveted or bolted construction of bridges and buildings, and for general structural purposes. General Specification for plates, shapes, hollow sections, sheet piling, cold-formed channels and bars used in construction.

Technical Information

Specification:

A500

 G40.21
  ROUND STRUCTURAL TUBING
Strength Levels: Grade C 50W

Yield Strength
Tensile Strength
Elongation % in 2"

46,000 PSI Min.
62,000 PSI Min.
21 Min.*

 50,000 PSI Min.
65,000-90,000 PSI
22 Min.*
  SHAPED STRUCTURAL TUBING
Strength Levels: Grade C 50W
Yield Strength
Tensile Strength
Elongation % in 2"

50,000 PSI Min.
62,000 PSI Min.
21 Min.*

 50,000 PSI Min.
65,000-90,000 PSI
22 Min.*
Chemistry Levels: Grade C 50W

Carbon
Manganese
Phosphorus
Sulphur
Silicon
Grain Refining Elements

.23 Max.
1.35 Max.
.035 Max.
.035 Max.
N/A
N/A

.23 Max.
.50-1.50
.040 Max.
.050 Max.
.40 Max.*
.10 Max.*
O.D. Size (Rounds): Grade C 50W
>1.9 to 2.5 incl.
Over 2.5-3.5 incl.
Over 3.5-5.5 incl.
Over 5.5

+/- .75%
+/- .75%
+/- .75%
+/- .75%

+/- .020"
+/- .030"
+/- .040"
+/- 1%
O.D. Size (Shapes): Grade C 50W
To 2.5 incl.
Over 2.5-3.5 incl.
Over 3.5-5.5 incl.
Over 5.5
(Largest outside dimension)		 +/- .020"
+/- .025"
+/- .030"
+/- 1%		 +/- .020"
+/- .030"
+/- .040"
+/- 1%
NOTE: Tolerance includes allowance for convexity and concavity. For rectangular sections, the tolerances 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.
Wall Thickness: +/- 10% + 10% / -5%

(Deviation from nominal)

    
Mass N/A + 10% / -3.5%
Straightness: 1/8" X length (in feet) 1/8" X length (in feet)
(Max. allowed) Divided by 5 Divided by 5
Squareness: +/- 2 degrees +/- 2 degrees
Twist:
1.5 and under
Over 1.5-2.5 incl.
Over 2.5-4.0 incl.
Over 4.0-6.0 incl.
Over 6.0-8.0 incl.
Over 8.0
(Max. per 3 feet of length)		 .050"
.062"
.075"
.087"
.100"
.112"

 .050"
.062"
.075"
.087"
.100"
.112"
Corner Radii:
(Wall thickness in inches)   Perimeter to
24" incl.		 Perimeter over
24"
To .109 incl.
Over .109-.134 incl.
Over .134-.156 incl.
Over .156-.188 incl.
Over .188-.250 incl.
Over .250-.313 incl.
Over .313-.375 incl.
Over .375-.500 incl.
Over .500
(Max. outside corner radius)		 3t
3t
3t
3t
3t
3t
3t
3t
3t 		.218"
.268"
.312"
.470"
.625"
.785"
.938"
1.250"
------ 		-----
-----
-----
-----
.750"
.940"
1.125"
1.500"
3t

NOTE:

1) The above is provided for information purposes only as a general comparison of the specifications listed and in no way should be considered as a complete version of each specification. For more detailed information, the actual specification should be consulted.
2) * Other restricions may apply. Please refer to the complete specification for details.
3) Consult the Steel Tube Institute of North America publication "Recommended Methods to Check Dimensional Tolerances On HSS" for the industry recognized measurement methods.
4) The above comparison also applies to the metric version of the CSA Specification G40.21 350W.