Steel Tube Handbook - 2018

14 Seamless structural hollow sections (HSS) Notes: • C – carbon equivalent formula: CEV(IIW) = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15 . • steel are weldable, specific conditions see individual standards. • rate cold workability isset by mechanical steel properties and is definite with regulations. • tubes according to EN 10210 fulfilled requirements for„CE“ marking • tubes according to ASTM A500 (steel Grade A, B, C, D), ASTM A501 and JIS G3444 (steel STR290, STK400, STK 490, STK 500, STK540) upon agreement. • possibility of hot dip zinc coating of tubes is necessary to discuss at inquiry • HFCHC - Hot Finished Circular Hollow Section List of dimensional standards and technical delivery conditions standards EN 10 025 Hot rolled products of structural steels. Part 1-6. EN 10 210-1,2 Hot finished structural hollow sections of non-alloy and fine grain structural steel. Part 1: TDC. Part 2: Tolerances, dimensions and sectional properties. See also ISO 630-2 (TDC) and ISO 657-14 (DS). EN 10266 Steel tubes, fittings and structural hollow sections - Symbols and definitions of terms for use in product standards. DIN 1629 - Seamless circular tubes of non-alloy steel with special quality requirements.TDC. DIN 2448 Plain end seamless steel tubes. Dimensions. DIN 17100 Steel for general structural purposes. Quality standard. DIN 17121 Seamless structural steel circular tubes for structural engineering purposes. DIN 17124 Seamless circular tubes of fine grain steel for engineering purposes. NFA 49-501 Steel tubes. Seamless or welded hot finished structural hollow sections. Dimensions. TDC. STN 42 0250 ČSN 42 0250 Hot formed seamless tubes from steel class 10 to 16. TDC. STN 42 5715 ČSN 42 5715 Hot formed seamless steel tubes. Dimensions. STN 42 5716 ČSN 42 5716 Hot formed seamless steel tubes with smaller tolerances. Dimensions. GOST 8731 Seamless hot-formed steel pipes. TDC. GOST 8732 Seamless hot-formed steel pipes. Dimensions. JIS G3444 Carbon steel tubes for general structural purposes. Standards Dimensions Dimensional standards Dimensional range Tolerance D Tolerance T Lengths Straightness Tube ends EN 10210-2 Table 5 / Page 40 • round profile • hot rolled • shape of the product HFCHS* Table 6 / Page 42 • ±1% • min ±0,5 mm • max ±10 mm • ovality2 % • weight ±6 %, max 8 % • –10 % –12,5 % for seamless profiles • + tolerance is limited by allowed weight Indicative values: • D < 60,3 mm 5–6 m • D ≥ 60,3 mm /T < 7,1 mm5–6malebo 10–14m • D ≥ 60,3 mm / T ≥ 7,1 mm 5–6 m Kinds: • random • fixed ±500 mm • exact L < 6m0 +10mm  L > 6 m 0 + 15 mm  • exact L > 12 m – tolerances upon agreement Allowed0,002.L of whole length locally 3 mm/m • square cut ends • free from excessive burrs DIN 2448 • ±1 % • min ±0,5 mm • weight - 8% +12% D < 130 mm • T ≤ 2Tn –10 % +15 % • 2Tn <T< 4Tn –10 % +12,5 % • T > 4Tn ±9 % Tn - basic wall thickness according to DIN 2448 D = 130–320 mm • T ≤ 0,05D –12,5% +17,5% • T > 0,05–0,11D ±12,5% • T > 0,11D ± 10% NFA 49-501 • D < 101,6 mm –12,5 % +15 % • D = 101,6–406,4 mm –12,5 % +17,5 % STN ČSN 42 5715 42 5716 See page 28 GOST 8732 See page 28  HF production facilities to 12,7 m + 30 mm (50 mm), over 12,7 m + 100 mm