Steel Beam Sizes / AISC / HSS Round / HSS 18.000x0.625

HSS 18.000x0.625 Steel Beam Dimensions and Properties

AISC Round HSS · v16.0

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Diagram, properties emphasis, and nearby alternatives use the selected unit system.

Units

Section diagram

HSS 18.000x0.625 dimensions

Not to scale. Dimensions shown for reference.

Section properties

Symbols match the steel section finder. Imperial and metric values are shown side by side.

Property Imperial Metric
Weight 116.09 lb/ft 173.00 kg/m
OD 18.000 in 457.000 mm
Nominal tw 0.625 in 15.900 mm
Design tw 0.581 in 14.800 mm
Area 31.80 in² 20,500.00 mm²
Ix 1,210.00 in⁴ 504,000,000 mm⁴
Iy 1,210.00 in⁴ 504,000,000 mm⁴
Sx 134.00 in³ 2,200,000 mm³
Sy 134.00 in³ 2,200,000 mm³
Zx 176.00 in³ 2,880,000 mm³
Zy 176.00 in³ 2,880,000 mm³
rx 6.16 in 156.00 mm
ry 6.16 in 156.00 mm
J 2,420.00 in⁴ 1,010,000,000 mm⁴

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus HSS 18.000x0.625.

Lighter in Round HSS

HSS 22.000x0.500

Weight
114.9 lb/ft (-1.0%)
Depth
— in
Ix
1,820.0 in⁴ (+50%)

Heavier in Round HSS

HSS 16.000x0.750

Weight
122.3 lb/ft (+5.3%)
Depth
— in
Ix
984.0 in⁴ (-19%)

Closest Iₓ in Round HSS

HSS 16.000x1.000

Weight
160.4 lb/ft (+38%)
Depth
— in
Ix
1,250.0 in⁴ (+3.3%)
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Source: AISC Shapes Database v16.0 · Methodology