DIN 17155 16Mo3 Pressure Vessel Steel is a German standard (now largely superseded by EN 10028-2) for a low-alloy, weldable, creep-resistant steel used in high-temperature boiler and pressure vessel applications, known for its excellent heat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
|
Dimensions <16mm |
Tensile strength, Rm: 440 - 590 MPa |
| The yield point, Rp0.2 >275 MPa | |
| Elongation, A > 24% | |
|
Dimensions 16-40mm |
Tensile strength, Rm: 440 - 590 MPa |
| The yield point, Rp0,2 >270 MPa | |
| Elongation, A > 24% | |
|
Dimensions 40-60mm |
Tensile strength, Rm: 440 - 590 MPa |
| The yield point, Rp0,2 >260 MPa | |
| Elongation, A > 23% | |
|
Dimensions 60-100mm |
Tensile strength, Rm: 430 - 580 MPa |
| The yield point, Rp0,2 >240 MPa | |
| Elongation, A > 22% | |
| Dimensions 100-150mm | Tensile strength, Rm: 420 - 570 MPa |
|
The yield point, Rp0,2 >220 MPa |
|
| Elongation, A > 19% |
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