533x312 UB — Sizes, Dimensions & Properties

4 sizes in the 533x312 serial size group. All dimensions in mm, section properties in cm units.

Designation	Mass (kg/m)	h (mm)	b (mm)	tw (mm)	tf (mm)	A (cm2)	Ixx (cm4)	Iyy (cm4)	Zxx (cm3)	Sxx (cm3)	rxx (cm)	ryy (cm)
533x312x273	273.3	577.1	320.2	21.1	37.6	348	199,000	20,600	6,890	7,870	23.9	7.69
533x312x219	218.8	560.3	317.4	18.3	29.2	279	151,000	15,600	5,400	6,120	23.3	7.48
533x312x182	181.5	550.7	314.5	15.2	24.4	231	123,000	12,700	4,480	5,040	23.1	7.4
533x312x151	150.6	542.5	312	12.7	20.3	192	101,000	10,300	3,710	4,150	22.9	7.32

533x312x273 UB

Designation: 533x312x273
Serial Size: 533x312
Mass per Metre: 273.3 kg/m
Depth of Section (h): 577.1 mm
Width of Section (b): 320.2 mm
Web Thickness (tw): 21.1 mm
Flange Thickness (tf): 37.6 mm
Root Radius (r): 12.7 mm
Depth Between Fillets (d): 476.5 mm
Local Buckling Ratio d/tw: 22.6
Local Buckling Ratio cf/tf: 4.26
Second Moment of Area Ixx: 199,000 cm4
Second Moment of Area Iyy: 20,600 cm4
Elastic Modulus Zxx: 6,890 cm3
Elastic Modulus Zyy: 1,290 cm3
Plastic Modulus Sxx: 7,870 cm3
Plastic Modulus Syy: 1,990 cm3
Radius of Gyration rxx: 23.9 cm
Radius of Gyration ryy: 7.69 cm
Cross-Sectional Area: 348 cm2
Buckling Parameter (u): 0.89
Torsional Index (x): 15.9
Warping Constant (Iw): 15 dm6
Torsional Constant (It): 1,290 cm4
Surface Area per Metre: 2.37 m2/m
Surface Area per Tonne: 8.67 m2/t

533x312x219 UB

Designation: 533x312x219
Serial Size: 533x312
Mass per Metre: 218.8 kg/m
Depth of Section (h): 560.3 mm
Width of Section (b): 317.4 mm
Web Thickness (tw): 18.3 mm
Flange Thickness (tf): 29.2 mm
Root Radius (r): 12.7 mm
Depth Between Fillets (d): 476.5 mm
Local Buckling Ratio d/tw: 26
Local Buckling Ratio cf/tf: 5.43
Second Moment of Area Ixx: 151,000 cm4
Second Moment of Area Iyy: 15,600 cm4
Elastic Modulus Zxx: 5,400 cm3
Elastic Modulus Zyy: 982 cm3
Plastic Modulus Sxx: 6,120 cm3
Plastic Modulus Syy: 1,510 cm3
Radius of Gyration rxx: 23.3 cm
Radius of Gyration ryy: 7.48 cm
Cross-Sectional Area: 279 cm2
Buckling Parameter (u): 0.884
Torsional Index (x): 19.8
Warping Constant (Iw): 11 dm6
Torsional Constant (It): 642 cm4
Surface Area per Metre: 2.33 m2/m
Surface Area per Tonne: 10.7 m2/t

533x312x182 UB

Designation: 533x312x182
Serial Size: 533x312
Mass per Metre: 181.5 kg/m
Depth of Section (h): 550.7 mm
Width of Section (b): 314.5 mm
Web Thickness (tw): 15.2 mm
Flange Thickness (tf): 24.4 mm
Root Radius (r): 12.7 mm
Depth Between Fillets (d): 476.5 mm
Local Buckling Ratio d/tw: 31.3
Local Buckling Ratio cf/tf: 6.44
Second Moment of Area Ixx: 123,000 cm4
Second Moment of Area Iyy: 12,700 cm4
Elastic Modulus Zxx: 4,480 cm3
Elastic Modulus Zyy: 806 cm3
Plastic Modulus Sxx: 5,040 cm3
Plastic Modulus Syy: 1,240 cm3
Radius of Gyration rxx: 23.1 cm
Radius of Gyration ryy: 7.4 cm
Cross-Sectional Area: 231 cm2
Buckling Parameter (u): 0.885
Torsional Index (x): 23.5
Warping Constant (Iw): 8.77 dm6
Torsional Constant (It): 373 cm4
Surface Area per Metre: 2.31 m2/m
Surface Area per Tonne: 12.7 m2/t

533x312x151 UB

Designation: 533x312x151
Serial Size: 533x312
Mass per Metre: 150.6 kg/m
Depth of Section (h): 542.5 mm
Width of Section (b): 312 mm
Web Thickness (tw): 12.7 mm
Flange Thickness (tf): 20.3 mm
Root Radius (r): 12.7 mm
Depth Between Fillets (d): 476.5 mm
Local Buckling Ratio d/tw: 37.5
Local Buckling Ratio cf/tf: 7.68
Second Moment of Area Ixx: 101,000 cm4
Second Moment of Area Iyy: 10,300 cm4
Elastic Modulus Zxx: 3,710 cm3
Elastic Modulus Zyy: 659 cm3
Plastic Modulus Sxx: 4,150 cm3
Plastic Modulus Syy: 1,010 cm3
Radius of Gyration rxx: 22.9 cm
Radius of Gyration ryy: 7.32 cm
Cross-Sectional Area: 192 cm2
Buckling Parameter (u): 0.885
Torsional Index (x): 27.9
Warping Constant (Iw): 7.01 dm6
Torsional Constant (It): 216 cm4
Surface Area per Metre: 2.29 m2/m
Surface Area per Tonne: 15.2 m2/t

533x312 UB — Overview

The 533x312 serial size group contains 4 sections, ranging from 150.6 kg/m to 273.3 kg/m. All sections in this group share the same nominal depth and width but differ in web and flange thickness, which affects the weight and structural capacity.

Section properties are sourced from the Tata Steel Blue Book / SCI P363. For structural design to BS EN 1993-1-1 (Eurocode 3), use these properties with the appropriate partial factors from the UK National Annex.

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Section properties from Tata Steel Blue Book / SCI P363 / BS 4-1:2005.