DIN 2393 Welded Precision Steel Tubes

Nominal Size: 20, 22, 25, 26, 28, 30, 32, 35, 38, 40, 42, 45, 48, 50, 55 mm

Wall Thickness: 1; 1,2; 1,5; 1,8; 2; 2,2; 2,5 mm

Tolerances:
Nominal Size
NS 20 - 30 mm: ± 0,08 mm
NS 32 - 40 mm: ± 0,15 mm
NS 42 - 50 mm: ± 0,20 mm
NS 55 mm: ± 0,15 mm

Wall Thickness: ± 7,5 %

Notes:

Steel Grades - RSt 34-2, RSt 37-2, St 44-2
Lenght Up to 9 m
Test certificates according to DIN EN 10204

Tube Sizes
Outside Diameter, mm (Nominal Size)	Wall Thickness, mm
20; 22; 25; 26; 28; 30	1,0; 1,2; 1,5; 1,8; 2,0
32; 35; 38; 40; 42; 45; 48; 50; 55	1,0; 1,2; 1,5; 1,8; 2,0; 2,2; 2,5

Mechanical properties
Steel Grade	Tensile Strength, N/mm2 (min)	Предел текучести, N/mm2 (min)	Elongation, % (min)
NBK - normalized
RSt 34-2	340 - 470	235	25
RSt 37-2	440 - 570	255	21
St 44-2	560 - 630	355	22
BK - without heat treatment
RSt 34-2	480	-	6
RSt 37-2	580	-	5
St 44-2	640	-	4
GBK - annealed
RSt 34-2	315	-	28
RSt 37-2	390	-	25
St 44-2	490	-	21

Chemical Composition (%, max)
Steel Grade	C	Si	Mn	S	P
RSt 34-2	0,15	0,30	0,60	0,025	0,025
RSt 37-2	0,17	0,30	0,70	0,025	0,025
St 44-2	0,21	0,30	1,10	0,025	0,025