GOST 8732-78 10 , 20 , 35 , 45 , Seamless Hot-Formed Steel Pipes ,  Structural Steel Pipe, Structrual Steel Tube

GOST 8732-78. Seamless Hot-Formed Steel Pipes

 
Outside Diameter: 32 – 219 mm 
(32; 33,7; 38; 42; 42,4; 45; 48,3; 50; 51; 54; 57; 60; 60.3*; 63,5; 68; 70; 73; 76; 82,5*; 83; 89; 95; 102; 108; 114; 121; 127; 133; 140; 146; 152; 159; 168; 178*; 180; 194; 203; 219)
 

Wall Thickness: 2.8 – 46 mm 
(2,8; 3; 3,2*; 3,5; 4; 4,5; 5; 5,5; 6; 6,5; 7; 7,5; 8; 8,5; 9; 9,5; 10; 11; 12; 13; 14; 15; 16; 17; 18; 19; 20; 22; 24; 25; 26; 28; 30; 32; 34; 35; 36; 38; 40; 42; 45) . 
 

Tolerances: 
OD: 
D 32 – 50 mm: ± 0.5 mm 
D 51 – 219 mm: ± 1%
WT: 
S 2,8 – 15 mm: + 12,5% – 15% 
S 16 – 30 mm: ± 12,5% 
S 32 – 45 mm: + 10% – 12,5%
Notes: 

1. Steel grades: 10, 20, 35, 45, 10Mn2, 15Cr, 20Cr, 40Cr, 30CrMnSi, 15CrMo, 30CrM acc. to GOST 1050-88, GOST 4543-71, GOST 19281-89.
2. Dimension marked by "*", as well as intermediate dimensions are produced subject to agreement.
3. Dimensions of pipes and tolerances according to GOST 8732-78.
4. Technical requirements according to GOST 8731-74.
5. Length from 4 up to 11.7 m depending on diameter and wall thickness.
6. Groups of metrics of quality: 
   B – with rate setting of chemical composition for killed steel (grades according to GOST 1050-88, GOST 4543-71, GOST 19281-89); 
   V – with rate setting of mechanical properties and chemical composition; 
   G – with rate setting of chemical composition and control of mechanical properties for heat-treated samples. Mechanical properties are according to steel standards.