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15MO3 steel

15Mo3 steel is a DIN specified pressure vessel grade chrome molybdenum steel alloy for use in elevated working temperatures.

15Mo3 steel is used as a weldable steel in the fabrication of industrial boilers and steel pressurised vessels found in the oil, gas and chemical industry. Due to the materials chrome and molybdenum content, 15Mo3 steel  has excellent heat resistance and corrosion resistant characteristics.

   15Mo3  DIN 17155 Number:1.5415 Comparision of steel grades
EN 10028-2 16 Mo 3
NFA 36-205 15 D3
UNI 5869 15 Mo 3
BS 1501 1503 - 243 B
UNE 36087 16 Mo 3
ASTM A 204 Gr. B
JIS G3115 -


Chemical Composition of DIN 15Mo3 steel

Grade C. max Mn. S.  N Cu Si. P. Cr. Ni. Mo.
15Mo3 0.12- 0.2 0.40- 0.90 0.01 0.012 0.30 0.35 0.025 0.30 0.30 0.25- 0.35


Merchanical Propertites of DIN 15Mo3 steel

Grade Tensile Strength 
(Mpa)
Yield Strength 
(Mpa)
Elongation in 100-150 mm(%) Elongation in 
16 mm(%)
Max Thickness
 (mm)
15Mo3 440-590 220-275 19 24 250