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Superseded By DIN EN 10305-2 : 2016 Welded cold drawn precision steel tubes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 |
|
|
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:
- Steel Grades - St28 St34.2 St37.2 St44.2 St52.3
- Lenght Up to 12000 mm
- 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 |
|
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 |
|
|
RSt 34-2 |
480 |
- |
6 |
RSt 37-2 |
580 |
- |
5 |
St 44-2 |
640 |
- |
4 |
|
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
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