Low ni content austenitic stainless steel with high strength / ductility properties

An alloy composition, comprising:

• Ni:
• between 2.00 and 3.60 wt %;
• Mn:
• between 6.0 and 7.0 wt %;
• Cr:
• between 15.0 and 16.5 wt %;
• N:
• between 0.085 and 0.180 wt %;
• Mo:
• between 0.00 and 0.50 wt %;
• Nb:
• above 0.00 and not higher than 0.40 wt %;
• Cu:
• between 0.00 and 1.00 wt %;
• Si:
• between 0.40 and 1.00 wt %;
• C:
• between 0.060 and 0.095 wt %;
• S:
• between 0.00 and 0.007 wt %;
• P:
• between 0.00 and 0.045 wt %;
• Ti:
• above 0.00 and not higher than 0.45 wt %;
• Fe:
• to balance the composition and incidental impurities;
• characterized by an Md30 value, obtained according to the equation Md30(° C.)=551-462(% C+% N)−9.2% Si−8.1% Mn−13.7% Cr−29(% Ni+% Cu)−18.5% Mo−68% Nb, of at least 55.