DIN 17175 alloy steel pipe is just a big class,and it has many classifivations. We mainly produce DIN 17175 ST35.8,DIN 17175 ST45.8, and 10CrMo910 steel pipes.
DIN 17175 steel pipes are used in boiler installations, high-pressure pipelines and tank construction and special machinery for both high (градусов 600) temperature and high-pressure devices. This alloy steel pipe is just a big class,and it has many classifivations.
We mainly produce DIN 17175 ST35.8,DIN 17175 ST45.8, and 10CrMo910 steel pipes.
Steel grade:
- DIN17175 St35.8
- DIN17175 St45.8
- 15Mo3
- 13CrMo44
- 10CrMo910
Chemical Compositions of DIN 17175 steel pipes (%)
| Grade | C | Si | Mn | P | S | Cr | Mo |
| St35.8 | ≤0.17 | 0.10-0.35 | 0.40-0.80 | ≤0.040 | ≤0.040 | / | / |
| St45.8 | ≤0.21 | 0.10-0.35 | 0.40-1.20 | ≤0.040 | ≤0.040 | / | / |
| 15Mo3 | 0.12-0.20 | 0.10-0.35 | 0.40-0.80 | ≤0.035 | ≤0.035 | / | 0.25-0.35 |
| 13CrMo44 | 0.10-0.18 | 0.10-0.35 | 0.40-0.70 | ≤0.035 | ≤0.035 | 0.70-1.10 | 0.46-0.65 |
| 10CrMo910 | 0.08-0.15 | ≤0.50 | 0.40-0.70 | ≤0.035 | ≤0.035 | 0.20-0.25 | 0.90-1.20 |
Mechanical Properties of DIN17175 steel pipe
| Grade | Yield Strength (Mpa) | Tensile Strength (Mpa) | Elongation(%) |
| St35.8 | ≥235 | 360-480 | 25 |
| St45.8 | ≥255 | 410-530 | 21 |
| 15Mo3 | ≥275 | 450-600 | 20 |
| 13CrMo44 | ≥290 | 440-590 | 20 |
| 10CrMo910 | ≥280 | 450-600 | 18 |
DIN 17175 Equivalent Steel Grade:
| OLD | New | ||||
|---|---|---|---|---|---|
| Execution | Norm | Steel grade | Execution | Norm | Steel grade |
| Welded | DIN 1626 | St.37.0 | Welded | DIN EN 10217-1 | P235TR2 |
| Welded | DIN 1626 | St.52.2 | Welded | DIN EN 10217-3 | P355N |
| Seamless | DIN 1629 | St.37.0 | Seamless | DIN EN 10216-1 | P235TR2 |
| Seamless | DIN 1629 | St.52.2 | Seamless | DIN EN 10216-3 | P355N |
| Seamless | DIN 17175 | St.35.8/1 | Seamless | DIN EN 10216-2 | P235GH |
| Seamless | ASTM A106* | Grade B | Seamless | DIN EN 10216-2 | P265GH |
| Seamless | ASTM A333* | Grade 6 | Seamless | DIN EN 10216-4 | P265NL |
Packing:
- Inner packing:Capson two ends of every pipe
- Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers’ requirements .
- Surface treatment:Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting.
- Marking: as per customer’s requirement
Differences beween 15Mo3 and 16Mo3
Q: I am confused when it comes to 15Mo3 and 16Mo3 for seamless tube and shell of pressure vessel respectively, for both of their steel number are 1.5415. Could anyone explain for me or recommend some books or articles for me to read? And is there ASME steels equivalent to 15Mo3 and 16Mo3 respectively?
A: 15Mo3 was the designation in DIN 17155, replaced in 1993 by EN 10028-2. At the same time, the name was changed to 16Mo3, maintaining the steel number 1.5415. There are small differences in minimum values between both.
As fat as I know there is no exact equivalent steel grade in ASME. The nearest is SA 204 Grade A with 0,5%Mo (against 0,3% for 16Mo3)
15Mo3 Mechanical Property
|
Grade |
15Mo3 Mechanical Property |
|
|
Thickness |
Yield |
|
|
15Mo3 |
mm |
Min Mpa |
|
6-16 |
275 |
|
|
16-40 |
270 |
|
|
40-60 |
260 |
|
|
60-100 |
240 |
|
|
100-150 |
220 |
|