DIN17175 German hot-strength seamless steel pipe standard

 There are many well-known boiler tube grades: St35.8, St45.8, 15Mo3, 13CrMo44, 10CrMo910, 14MoV63, 12Cr1MoV are all materials that meet the DIN17175 German heat-resistant seamless tube standard.

These materials under the DIN17175 standard have good mechanical properties even under long-term load when working in a higher temperature environment (some up to 600 ° C), and are considered to be thermally strong steels.

Please refer to the table below for specific grades and parameters.

Heat-strength steel for making seamless steel tubes and its chemical composition

Grade
Code
C
Si
Mn
P
S
Cr
Mo
Ni
V
St35.8
1.0305
≤0.17
0.1-0.35
0.40-1.30
0.04
0.04
 
 
 
 
St45.8
1.0405
≤0.21
0.1-0.35
0.40-1.20
0.04
0.04
 
 
 
 
17Mn4
1.0481
0.14-0.2
0.20-0.40
0.90-1.20
0.04
0.04
≤0.30 
 
 
 
19Mn5
1.0482
0.17-0.22
0.30-0.60
1.00-1.30
0.04
0.04
≤0.30 
 
 
 
15Mo3
1.5415
0.12-0.2
0.10-0.35
0.40-0.80
0.035
0.035
 
0.25-0.35
 
 
13CrM044
1.7335
0.1-0.18
0.10-0.35
0.40-0.70
0.035
0.035
0.70-1.10
0.45-0.65
 
 
10CrMo910
1.738
0.08-0.15
≤0.50 
0.40-0.70
0.035
0.035
2.00-2.50
0.90-1.20
 
 
14MoV63
1.7715
0.1-0.18
0.10-0.35
0.40-0.70
0.035
0.035
0.30-0.50
0.50-0.70
 
0.22-0.32
X20CrMoV121
1.4922
0.17-0.23
≤0.50 
≤1.00
0.03
0.03
10.00-12.50
0.80-1.20
0.30-0.80
0.25-0.35

Mechanical properties of DIN17175 heat-strength steel seamless pipes at room temperature

Grade
Code
Ttensile Strength N/mm2

Yield Strength

wall thickness，mm

Elongation（L=5do）
Notched impact energy
≤16
＞16≤40
＞40≤60
Portrait
Horizontal
Horizontal
N/mm2 min
 
% min
δ min
St35.8
1.0305
350-480
235
225
215
25
23
34
St45.8
1.0405
410-530
255
245
235
21
19
27
17Mn4
1.0481
460-580
270
270
260
23
21
34
19Mn5
1.0482
510-610
310
310
300
19
17
34
15Mo3
1.5415
450-600
270
270
260
22
20
34
13CrM044
1.7335
440-590
290
290
280
22
20
34
10CrMo910
1.738
450-600
280
280
270
20
18
34
14MoV63
1.7715
460-610
320
320
310
20
18
41
X20CrMoV121
1.4922
690- 540
490
490
490
17
14
34

If you are interested in seamless pipes for thermal strength boilers, you can contact us at any time


From：http://boilersteelpipe.com/pro/smls/din17175-german-hot-strength-seamless-steel-pipe-standard.html

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