DIN 17155 16Mo3 Pressure Vessel Steel is a German standard (now largely superseded by EN 10028-2) for a low-alloy, weldable, creep-resistant steel used in high-temperature boiler and pressure vessel applications, known for its excellent heat resistance and strength up to about 500°C, thanks to its molybdenum content, with equivalents in ASTM (A204 Gr. B) and other standards, often found in power plants and oil/gas industries.
The chemical composition of 16Mo3 is given in the table below.
|
Element |
Percentage % |
Element |
Percentage % |
|
C |
0.12/0.20 |
Ni |
0.30 |
|
Si |
0.35 |
Nb |
- |
|
Mn |
0.40/0.90 |
Ti |
- |
|
P |
0.025 |
V |
- |
|
S |
0.010 |
Al |
- |
|
Cr |
0.030 |
N |
0.012 |
|
Mo |
0.25/0.35 |
Cu |
0.30 |
Mechanical properties of 16Mo3, 1.5415 according to EN 10273
| Temperature (℃) | 200 | 250 | 300 | 350 | 400 | 450 | 500 |
|---|---|---|---|---|---|---|---|
| The yield point Rp0.2 (MPa) | 215 | 200 | 170 | 160 | 150 | 145 | 140 |
| Temperature (℃) | 450 | 470 | 490 | 510 | 530 |
|---|---|---|---|---|---|
| Creep strength, Rz/100000 (MPa) | 239 | 178 | 123 | 81 | 53 |
| Creep limit, R1/100000 (MPa) | 167 | 126 | 89 | 59 | 36 |
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