"12 Chrome Moly Van” steels are a series of martensitic stainless steels designed for use at moderately high temperatures.

1.4923 is a typical grade in this series. The dominant application is steam power generating plant.

DIN 1.4923 stainless grade combines the following characteristics:

• Moderate strength – 800 MPa UTS, 600 MPa 0.2% PS at room temperature
• Moderate high temperature strength – 280 MPa 0.2% PS at 550°C
• Good creep strength – 137 MPa rupture stress at 550°C at 100000 hours
• Moderate toughness – typically 50 J at room temperature
• Basic corrosion resistance
• Weldable with care. Requires pre and post weld heat treatment

Applications which illustrate these features include:

Pressure equipment, high temperature bolting, steam turbines, nuclear reactors, gas turbines, petroleum refining.