Round HSS

HSS 300x9.5

Standard: CSA G40.20/G40.21Source: Calculated (exact engine)
Calculated: design thickness = nominal thickness (CSA G40.20, Class C), outside radius 2t. Range derived from ASTM A500 sizes — cross-check with the CISC tables.
xyD = 299.7t = 9.52t = 9.52
Cross-section, to scaledimensions in mm

Dimensions

Outside diameterD
299.7mm
Thicknesst
9.52mm

Mass and area

Mass per lengthm
68.13kg/m
Cross-sectional areaA
8,679mm²
Outside perimeterP
941.5mm

Strong axis x–x

Moment of inertiaIx
91.4510⁶ mm⁴
Elastic section modulusSx
610.310³ mm³
Plastic section modulusZx
801.910³ mm³
Radius of gyrationrx
102.6mm

Weak axis y–y

Moment of inertiaIy
91.4510⁶ mm⁴
Elastic section modulusSy
610.310³ mm³
Plastic section modulusZy
801.910³ mm³
Radius of gyrationry
102.6mm

Torsion and stability

Torsional constantJ
182,89310³ mm⁴

Equivalents in other standards