What does maraging steel mean?
Maraging steel is high-strength steel that possesses increased toughness. It is also refers to the aging of martensite, a hard microstructure commonly found in steels. The term maraging is derived from the strengthening mechanism, which transforms the alloy to martensite with subsequent age hardening.
Is 300m a maraging steel?
Maraging 300 / VASCOMAX® 300 is an 18% nickel, cobalt strengthened steel (C-type) with excellent properties, workability and heat treatment characteristics. Maraging is double vacuum melted by VIM (Vacuum Induction Melt) followed by VAR (Vacuum Arc Remelt).
What is the composition of maraging steel?
The common, non-stainless grades contain 17–19 wt% nickel, 8–12 wt% cobalt, 3–5 wt% molybdenum and 0.2–1.6 wt% titanium. Addition of chromium produces stainless grades resistant to corrosion.
How strong is maraging steel?
With yield strength between 1400 and 2400 MPa maraging steels belong to the category of ultra-high-strength materials. The high strength is combined with excellent toughness properties and weldability.
What is the strength of maraging steel?
Maraging steels belong to the group of high-strength steels, i.e. tensile strength >1000 MPa. The achieved strength values range from 1000 MPa up to 3000 MPa. The stress–strain behaviour is characterised by a yield strength that is above 80% of the ultimate tensile strength, i.e., the work hardening is small.
What are the precipitates in maraging steel?
Newer grades of maraging steel contain complex Ni 50 (X,Y,Z) 50 precipitates, where X, Y and Z are solute elements such as Mo, Ti and Al. The precipitates in maraging steel are effective at restricting the movement of dislocations, and thereby promote strengthening by the precipitation hardening process.
How is maraging steel used in aircraft components?
After quenching, maraging steel undergoes a final stage of strengthening involving thermal ageing before being used in aircraft components. Maraging steel is heat-treated at 480–500 °C for several hours to form a fine dispersion of hard precipitates within the soft martensite matrix.
What are the mechanical properties of 18 Ni maraging steel?
Mechanical properties of different 18 Ni maraging steel grades. C: at 815°C for 1 hour and 480°C for 5 hours. As the name (martensitic + ageing) suggests, the key step in the production of maraging steel is the ageing (or heat treatment).