DIN 17155 15Mo3 is a German old pearlitic heat resistant steel (numerical code 1.5415), the core is used for medium temperature pressure equipment, is now mostly replaced by EN 10028-2 but still commonly used in trade and engineering.
| Steel Grade | Thickness, in mm | Yield Strength, min | Tensile Strength | Elongation, %, min |
| Low-alloy DIN 17155 15Mo3 Pressure Steel | T≤16 | 275 | 440-590 | 20 |
| 16<T≤40 | 270 | |||
| 40<T≤60 | 260 | |||
| 60<T≤100 | 240 | 430-580 | 19 | |
| 100<T≤150 | 220 | 420-57 |
Key Information
Application: Primarily used for components that require good heat resistance and corrosion resistance, such as industrial boilers, heat exchangers, and spherical tanks.
Standard Status: The DIN 17155 standard has largely been superseded by the European standard EN 10028. The direct equivalent in the modern EN standard is 16Mo3 (1.5415 material number).


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