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Common steel section sizes ( metric ).  

The steel sections below are a few of the common sizes you should be able to order from any steel merchant. These tables are to assist you when planning a new project, its always handy to know what steel sizes are available. Sorry, but these figures are in metric.

When you order steel, it pays to ask the merchant what the standard length is and buy your steel based on this length. Merchants dont like keeping offcuts, so if you can order full lengths you could get a better price.

Common name
& end section.
Size Wall Thickness (mm)

SHS

Square
Hollow
Section

Measured by
Outside
edges

13mm SHS 1.6
20mm SHS 1.6
25mm SHS 1.6, 2, 2.5, 3
30mm SHS 1.6, 2, 2.5, 3
35mm SHS 1.6, 2, 2.5, 3
40mm SHS 1.6, 2, 2.5, 3, 4
50mm SHS 1.6, 2, 2.5, 3, 4, 5, 6
65mm SHS 1.6, 2, 2.5, 3, 4, 5, 6
75mm SHS 2, 2.5, 3, 3.5, 4, 5, 6
89(90)mm SHS 2, 3.5, 5, 6
100mm SHS 2.5, 3, 4, 5, 6, 9
125mm SHS 4, 5, 6
150mm SHS 5, 6, 9
200mm SHS 5, 6, 9
250mm SHS 6, 9

RHS

Rectangular
Hollow
Section

Measured by
Outside
edges

50X20mm RHS 1.6, 2, 2.5, 3
50X25mm RHS 1.6, 2, 2.5, 3
65X35mm RHS 2, 2.5, 3, 4
75X25mm RHS 1.6, 2, 2.5
75X50mm RHS 1.6, 2, 2.5, 3, 4, 5, 6
100X50mm RHS 1.6, 2, 2.5, 3, 3.5, 4, 5, 6
125X75mm RHS 2.5, 3, 4, 5, 6
150X50mm RHS 2, 2.5, 3, 4, 5, 6
150X100mm RHS 4, 5, 6, 9
200X100mm RHS 4, 5, 6, 9
250X150mm RHS 5, 6, 9

Flat

10mm 3
13mm 3, 5, 6
16mm 3, 5
20mm 3, 5, 6, 10
25mm 3, 5, 6, 8, 10, 12
32mm 3, 5, 6, 8, 10, 12
40mm 3, 5, 6, 8, 10, 12, 16, 20
50mm 3, 5, 6, 8, 10, 12, 16, 20, 25
65mm 3, 5, 6, 8, 10, 12, 16, 20
75mm 3, 5, 6, 8, 10, 12, 16, 20, 25, 40
90mm 6, 8, 10, 12
100mm 3, 5, 6, 8, 10, 12, 16, 20, 25, 50

Angle

20X20mm 3
25X25mm 3, 5, 6
30X30mm 3, 5, 6
40X40mm 3, 5, 6
45X45mm 3, 5, 6
50X50mm 3, 5, 6, 8
55X55mm 5, 6
65X65mm 5, 6, 8, 10
75X75mm 5, 6, 8, 10
90X90mm 6, 8, 10
100X100mm 6, 8, 10, 12
125X125mm 8, 10, 12, 16
150X150mm 10, 12, 16
200X200mm 13, 16, 20, 26

Unequal
Angle

65X50mm 5, 6, 8
75X50mm 5, 6, 8
100X75mm 6, 8, 10
125X75mm 6, 8, 10, 12
150X90mm 8, 10, 12
150X100mm 10, 12

  Measured by OD ( Outside Diameter )


Round
or rod

 

6.3, 8, 10, 12,
14, 16, 18, 20,
22, 24, 27, 30,
33, 36, 39, 42,
45, 50, 56, 60,
65, 75, 80, 90, 100

Measured by ID ( Inside Diameter ). To work out the OD, add the ID and 2 X wall thickness.

CHS
or Pipe

Circular
Hollow
Section

 

10mm 2.3, 2.9
15mm 2, 2.6, 3.2
20mm 2, 2.3, 2.6, 3.2
25mm 2, 2.6, 3.2, 4
32mm 2, 2.6, 3.2, 4, 4.9
40mm 2.3, 2.9, 3.2, 4, 5.4
50mm 2.3, 2.9, 3.6, 4.5, 5.4
65mm 2.3, 3.2, 3.6, 4.5, 5.9
80mm 2.6, 3.2, 4, 5, 5.9
90mm 3.2, 4, 5
100mm 3.2, 3.6, 4.5, 5.4
125mm 3, 3.5, 5, 5.4
150mm 3, 3.5, 5, 5.4

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