DIN2393 St37 St52 Cold Drawn Welded Precision Tubes

• Customization: Available
• Application: Chemical Industry, Construction Industry, Oil and Gas Industry, Water Treatment Plants
• Carbon Content: Low Carbon Steel
• Model NO.: KM-0115
• End Connection: Beveled End
• Length: Custom Length
• Outer Diameter: 6mm~65mm
• Surface Finish: Varnish Coating
• Type: Welded Pipe
• Wall Thickness: 1mm ~ 8mm
• Size: 10mm~50mm
• Thickness: 1mm ~ 8mm
• Temperature Classification: High Temperature Piping
• MPa Classfication: High Pressure Piping
• Material: Alloy Steel
• Standard: ASTM, GB, API, DIN
• Cross-Section Shape: Round
• Connection Type: Welding
• Transport Package: in Bundle or Wooden Boxes
• Specification: 6mm~65mm
• Trademark: Kingmetal
• Origin: Made in China
• HS Code: 73045190
• Production Capacity: 2000 Tons Per Month

Product Description

Cold Drawn Welded Precision Tubes (CEW Tubes or CDW Tubes)

Standard:DIN2393 (EN10305-2, E235 (St37), E355 (St52),DIN 2391 (EN10305-1),ASTM A178,etc
Size Range : 6mm OD TO 65mm od, w.th. 1mm to 8mm
Supply Condition:BK, BKW, BKS, GBK, NBK

Standard

DIN 2393 St28 St34.2 St37.2 St44.2 St52.3 Welded Precision Steel Tubes

Superseded By DIN EN 10305-2 : 2016 Welded cold drawn precision steel tubes

DIN 2393 Standard applies to welded precision steel tubes; and in compliance with ISO/DIS 3304.DIN 2393 Precision Welded Steel Tubes is mainly applicated for Auto and motorcycle shock absorber, Gas spring, Hydraulic system steel tube, Electric industry, Construction machinery, Heat exchanger and Condenser.

Material Grade: St28, St34.2, St37.2, St44.2, St52.3

Surface Condition: Polished, brightness, metallic color

Size: OD 6mm-65mm,WT 1-8mm

Length: Random 10-12000mm, custom-made as well

Tolerance: +/-0.05mm. Special tolerance:+/-0.03mm

Grade and Chemical Composition

Grade	C max	Si max	Mn min	P max	S max	Ni	Cr
St52.3	0.22	0.55Max	1.60Min	0.040	0.040
St28	0.13			0.50	0.50
St34.2	0.15			0.50	0.50
St37.2	0.17			0.50	0.50
St44.2	0.21			0.50	0.50

Welded Tubes are COLD DRAWN (DRAWN OVER MANDREL) when the application required close dimensional tolerances. They are called CEW Tubes or CDW Tubes. These tubes are widely used in automobile industry and also for manufacturing material handling equipment, special purpose machines, hydraulic equipment, textile machinery, etc. Just like Seamless Precision Tubes, they too have low carbon content, are highly malleable, suitable for bending. The tubes are annealed, if required, after drawing, straightened and undergo a pickling process that gives it an excellent blemish-free finish. Finally they are tested chemically, physically and for hydraulic pressure and other non-destructive tests such as Eddy Current Test, etc. and suitably packed in wooden boxes before shipment.

EN 10305-2 and DIN 2393 Grade Comparison

DIN Norms: DIN 2393	EN Norms: EN 10305-2	UNI Norms: UNI 7946
RSt 34.2	E195	Fe320
RSt 37.2	E235	Fe360
St 52.3	E355	Fe490

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:

1. Steel Grades - St28 St34.2 St37.2 St44.2 St52.3
2. Lenght Up to 12000 mm
3. Test certificates according to DIN EN 10204 3.1

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

 

Standard  No	Steel Grade	Standard Name	Dimension  Range
EN 10208	L210GA,L235GA,L245GA,L290GA,  L360GA,L245NB, L290NB,L360NB,  L415NB, L360QB, LI15QB,L450QB,  L485QB,L555QB	Steel Pipes for Pipelines for  Combustible Fluids	33.7-1626mm
EN 10210	S235JRH,S275JOH,S275J2H,S355JOH,  S355J2H,S355K2H,S275NH,S275NLH,  S355NH,S355NLH,S420NH,S420NLH,  S46INH,S460NLH	Hot Finished Structural  Hollow Sections of Non-alloy  and Fine Grain Steels	21.3-1219mm
EN 10216-1	P195TRI,P195TR2,P235TR1,  P235TR2, P265TR I, P265TR2	Seamless Steel Tubes for  Pressure Purposes-1-  Non-alloy Steel Tubes with  Specified Room Temperature  Properties	10.2-711mm
EN 10216-2	P195GH, P235GH, P265GH,  20MnNb6,16Mo3, 8MoB5-4,  14MoV6.3, 10CrMo5.5,13CrMo4-5,  10CrMo9-10, 11CrMo9.10,  25CrMo4,20CrMoV13-5-5,  15 NiCuMoNB-6-4,X11CrMo5+1,  X11CrMo5+NTI,X11CrMo5+NT2,  X11CrMo9.1+1, X11CrMo9.1+NT,  X10CrMoVNb9-l, X20CrNiV11-1	Seamless Steel Tubes for  Pressure Purposes-2:  Non-alloy and Alloy Steel  Tubes with Specified Elevated  Temperature Properties	10.2-711mm
EN 10216-3	P275NL I,P275NL2, P355N,P355NH,  P355NL1,P355NL2,P460N,P460NH,  P460NL1,P460NL2,P620Q,P620QH,P620QL,  P690Q,P690QH,P690OL1,P690QL2	Seamless Steel Tubes for  Pressure Purposes-3:  Alloy Fine Grant Steel Tubes	10.2-711mm
EN10216-4	P215NL,P255QL,P265NL,  26CrMo4.2,11MnNi5-3,13MnNi6-3,  12Nil4,Xl2Ni5,X10Ni9	Seamless Steel Tubes far  Pressure Purposes-4:  Non-alloy aid Alloy Steel  Tubes with Specified Low  Temperature Properties	10.2-711mm
EN 10224	L235, L275, L355	Non-alloy Steel Tubes and  Fittings for the Conveyance of  Water and Other Aqueous  Liquids	26.9-2743mm
EN 10297-1	E235,E275,E315,E355,E470,  E275K2,E355K2,E420J2,E460K2,  E590K2,F730K2 C22E,C35E,C45E,C60E,  38Mn6,41Cr4,25CrMo4,30CrMo4,  34CrMo4,42CrMo4,36CrNiMo4,  30CrNiMo8,4lNiCrMo7-3-2	Seamless Circular Steel Tubes  for Mechanical mid General  Engineering Purposes-1:  Non-alloy and Alloy  Steel Tubes	26.9-610mm
EN 10305-1	E215,E235,E355	Steel Tubes For Precision  Applications-1:  Seamless Cold Drawn Tubes	4-260mm
EN 10305-4	E215,E235,E355	Steel Tubes for precision  Applications-4:  Seamless Cold Drawn Tubes  for Hydraulic mid Pneumatic  Power Systems	4-80mm

 

HEAT-TREATABLE STEELS  Seamless steel tubes acc. to DIN EN 10083-3 and DIN 17204
	DIN EN 10083-3:	Heat-treatable steels (Quenched & tempered steels)
	Steel grades:	e.g. 25CrMo4, 34CrMo4, 42CrMo4
	DIN 2448/17204:	Seamless circular tubes made from heat-treatable steels
	(DIN 2448 [replaced]):	Plain end seamless steel tubes: Dimensions and conventional masses per unit length
	Steel grades:	e.g. 25 CrMo 4, 34 CrMo 4, 42 CrMo 4
	Fields of application:
	General mechanical engineering and tool-building, vehicle construction, pressure vessel and pipeline construction
TUBES FOR STRUCTURAL STEEL CONSTRUCTIONS MADE FROM FINE-GRAIN STEELS Seamless steel tubes acc. to DIN EN 10210 and DIN 17124
	DIN EN 10210-1:	Hot-finished structural hollow sections of non-alloy and fine-grain structural steels
	Steel grades:	e.g. S275NH, S355NH, S355NLH, S460NH, S460NLH
	DIN EN 10210-2:	Hot-finished structural hollow sections of non-alloy and fine-grain structural steels - Tolerances, dimensions and sectional properties
	DIN 2448/17124 (replaced):	Seamless circular tubes of fine-grain steels for engineering purposes
	(DIN 2448 [replaced]):	Plain end seamless steel tubes: Dimensions and conventional masses per unit length
	Steel grades:	e.g. StE 285, StE 355, TStE 355, StE 460, TStE 460
	Fields of application:
	Steel construction ( e.g. structural and civil engineering ), bridge and crane construction
PIPELINES FOR GAS AND COMBUSTIBLE FLUIDS  Seamless steel tubes acc. to DIN EN 10208-2 and DIN 17172
	DIN EN 10216-2:	Steel pipes for pipelines for combustible fluids Tubes from requirement class B
	Steel grades:	e.g. L290NB, L360NB, L415NB, L415QB
	DIN 2448/17171 (replaced):	Steel pipes for pipelines for the transport of combustible fluids and gases
	(DIN 2448 [replaced]):	Plain end seamless steel tubes: Dimensions and conventional masses per unit length
	Steel grades:	e.g. StE 290.7, StE 360.7, StE 415.7
	Fields of application:
	Long-distance pipelines (e.g. oil and oil products) for compressed and liquid gases
SEAMLESS TUBES FOR PRESSURE PURPOSES AT ROOM TEMPERATURE  Seamless steel tubes acc. to DIN EN 10216-3 and DIN 17179
	DIN EN 10216-3:	Seamless steel tubes for pressure purposes of alloy fine- grain steels with specified properties at room temperature
	Steel grades:	e.g. P355N, P355NH, P355NL1, P355NL2
	DIN 2448/17179 (replaced):	Seamless circular tubes of fine-grain steels for special requirements
	(DIN 2448 [replaced]):	Plain end seamless steel tubes: Dimensions and conventional masses per unit length
	Steel grades:	e.g. StE 355, WStE 355, TStE 355, EStE 355
	Fields of application:
	Pressure vessel construction, apparatus engineering, pipelines, mechanical engineering and tool-building.
SEAMLESS TUBES FOR PRESSURE PURPOSES AT LOW TEMPERATURES  Seamless steel tubes acc. to DIN EN 10216-4 and DIN 17173
	DIN EN 10216-4:	Seamless steel tubes for pressure purposes of non-alloy and alloy steels with specified low-temperature properties.
	DIN 2448/17173 (replaced):	Seamless circular tubes of cold-resistant steels
	(DIN 2448 [replaced]):	Plain end seamless steel tubes: Dimensions and conventional masses per unit length
	Fields of application:
	Apparatus engineering, vessel construction, pipelines, mechanical engineering and tool-building.

DIN 2391 Seamless Precision Steel Tubes
DIN 2393 St28 St34.2 St37.2 St44.2 St52.3 Welded Precision Steel Tubes
EN 10305-2 E195 E235 E355 Welded Cold Drawn Precision Steel Tube
EN 10305-1 E215 E235 E355 Seamless Precision Steel Tube Tubing Tubes
Features of Pipe Series of high-precision bright Steel Tube