Steel Tube Handbook - 2018

64 Precision cold drawn seamless standard steel tubes List of dimensional standards and technical delivery conditions standards Notes: 1. Tolerances of outside or inside diameter are not given like % of diameter as with rolled tubes, but they are usually a part of dimensional tables. Values in Table 25 are taken from EN 10305-1. Exact tolerance values of tubes according to other standards are given in appropriete standards. 2. Tubes shall be ordered: D x d, D x T, d x T (d = inside diameter). The tolerances are valid for these two ordered values. 3. Tubes for mechanical and pressure purposes (page 16–47) upon agreement can be delivered as precision according to dimensional standards for precision tubes. 4. Precision tubes can be delivered also upon bilaterally agreed TDC and technical specifications. 5. Ovality and eccentricity see page 4. STN 42 0260 ČSN 42 0260 Cold drawn precision seamless steel tubes from steel class 10 to 16. STN 42 6710 ČSN 42 6710 Cold drawn seamless tubes with normal tolerances. Dimensions. STN 42 6711 ČSN 42 6711 Precision seamless steel tubes. Dimensions. STN 42 6712 ČSN 42 6712 Precision seamless steel tubes with increased accuracy. Dimensions. GOST 8733 Seamless steel tubes cold and hot deformed. TDC. GOST 8734 Seamless steel tubes cold deformed. Dimensions. GOST 12132 Electrowelded and seamless steel tubes for automotive and bicycle industries. GOST 21729 Cold deformed and hot deformed structural carbon and alloyed steel tubes. PN-H 74220 Seamless steel cold drawn or rolled tubes for general purposes. PN-H 74240 Seamless cold drawn precision steel tubes. ASTM A519 Seamless carbon and alloy steel mechanical tubing. JIS G 3445 Carbon steel tubes for machine structural purposes. GOST 9267 Precision seamless steel tubes. Dimensions. Stan- dards Dimensions Dimensional standards Dimensional range Tolerance D Tolerance T Lengths Straightness Tube ends STN ČSN (42 6710) Delivery upon agreement see page 36 • square cut ends • free from excessive burrs • plain ends 42 6711 Table 25/Page 69 Table 26/Page 70 Table 23/Page 68 (Other dimensions upon agreement) D ≤ 30 mm ±0,20 mm D = 30–50 mm ±0,30 mm D = 50–200 mm ±0,8 % D ≤ 10 mm ±0,20 mm D>10 mm, T ≤ 1 mm ±0,12 mm D >10 mm,T=1–3 mm –10% +12% D > 10 mm, T > 3 mm ±10 % • random 3–7 (9) m • fixed with tolerance ±500 mm • exact with tolerance 0 + upon agreement • max length 18 m - upon agreement L ≤ 3 m 0 +5 mm L > 3 m 0 +10 mm D ≤ 15 mm Straightened 3 mm/m .+1 Precise straightened 1,5 mm/m .+2 (second number behind RN) 42 6712 D ≤ 30 mm ±0,10 mm D = 30–40 mm ±0,15 mm D = 40–50 mm ±0,20 mm D = 50–200 mm ±0,5 % (From d= 18 mm possible to order by d) D ≤ 10 mm ±0,20 mm D >10 mm, T ≤ 1 mm ±0,10 mm D >10 mm, T > 1 mm ±10 % GOST 8734 D = 5–10 mm ±0,15 mm D = 10–30 mm ±0,30 mm D = 30–50 mm ±0,4 mm D > 50 mm ±0,8 % T ≤ 1 mm ±0,12 mm T = 1–5 mm ±10 % T > 5 mm ±8 % Flexion max 1,5 mm/m 9567 See dimensional tables (Inside diameter tolerance is also shown in table) • other tolerances upon agreement • possibility to shift tolerance • by heat treated tubes increasing of tolerance range • ovality included in D tolerances • eccentricity included in T tolerances D = 5–108 mm T = 0,2–0,8 mm ±0,05 mm T = 0,8–5 mm ±7,5 % T > 5 mm ±6 % 12132 Quality range: • usual • increased • high see article 1.10 of standard PN-H 74240 (74220) See dimensional tables (Inside diameter tolerance is also shown in table) • other tolerances upon agreement • possibility to shift tolerance • by heat treated tubes increasing of tolerance range • ovality included in D tolerances • eccentricity included in T tolerances ±10 % min ±0,1 mm Applied for ordering by: • D x T • D x T) • random 3-7 (9) m • fixed with tolerance ±500 mm • exact with tolerance 0 + upon agreement • max length 18 m - upon agreement • total deviation: ReH < 500 MPa 0,0015 L ReH > 500 MPa 0,002 L • local deviation max 3 mm/m ASTM A519 See page 18 JIS G3445 See page 18