Steel Tube Handbook - 2018

106 US units SI SI US units 1 inch 25,4 mm 1 mm 0.03937 inch 12 inches = 1 foot 304,8 mm 1 m 3.2808 feet 1 sq inch 645 mm 2 1 mm 2 0.00155 sq inch 1 sq foot 0,093 m 2 1 m 2 10.753 sq feet 1 cubic foot 0,02831685 m 3 1 m 3 35.31 cubic feet 1pound (1lb) 0,453592 kg 1 kg 2.20462 lbs 1 short ton (US) 0,907185 metric t 1 metric t 1,10231 short ton 1 long ton (UK) 1,01605 metric t 1 metric t 0,9842 long ton 1 ksi 6,894757 Mpa 1 Mpa 0,145038 ksi Conversion table of steel parameters Units: inch (in) foot (ft) pound (lb) Temperature: °C = 5/9 (°F – 32) °F = 9/5 °C + 32 Conversion of weight to length – C-steel: Dimensions in mm: 0,0246615 (D – T).T (kg/m) Dimensions in inch: 10,68142 (D – T).T (lbs/ft) Weight conversion: kg/m = 1,48816 lb/ft lb/ft = 0,67197 kg/m Pressure conversion: 1 Pa = 1 N/m 2 1 MPa = 1 N/mm 2 1 MPa = 10,1972 at 1 MPa = 10 6 Pa = 10 bar 1 at = 1 kp/cm 2 (old unit) 1 at = 0,09806 MPa 1 at = 0,98066 bar 1 bar = 1,01972 at (tech) 1 bar = 100 000 Pa (100 kPa) 1 bar = 14,504 psi 1 psi (pound per square inch) = 1 lb/in 2 1 psi = 0,006894757 MPa (6 895 kPa) 1 psi = 0,06894 bar (0,070307 at) 1 ksi = 1 000 psi = 6,895 (6,9) MPa Boiler steel designation • base non-alloy steel P – steel for pressure equipments 235 – minimum yield strength in N/mm2 G – general charakteristic, devise to second symbol H – high temperature • alloy steel steel designated according to chemical composition (PED 97/23EC and AD 2000 - W4) Designation of steel for low temperature P - steel for pressure equipments 215 - minimum yield strength in N/mm2 N - normalized or normalising formed L - low temperature steel Alloy steels are designated according to the chemical composition (PED 97/23EC and AD 2000 - W4) Designation of steels from fine grain steel P - steel for pressure equipments 355 - minimum yield strength in N/mm2 N - normalized or normalising formed NH - high temperature steel NL1 - low temperature steel NL2 - special low temperature steel (PED 97/23EC and AD 2000 - W4) Designation of steels for elevated temperature P steel for pressure equipments 235 - minimum yield strength in N/mm 2 T - steel for tubes R - room temperature 1, 2 - group of quality TR 1 - Fluid Transportation - General Purposes (see page 52) TR 2 - Piping and Pressure Purposes (PED 97/23EC and AD 2000 - W4)

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