S165M is a high strength low carbon martensitic/ austenitic stainless steel. It combines high strength, good fatigue resistance with good weldability, properties which are maintained after welding. Two minimum tensile levels are often used; QT760 and QT900. QT900 is mostly used by the industry.
10 - 410 mm
Charpy impact energy, V-notchaK,charpy,V-notch
32 J at -40 °C
16 % at 20 °C
280 - 340 [-] at 20 °C
900 - 1100 MPa at 20 °C
Yield strength Rp0.2Rp0.2
750 MPa at 20 °C
15 - 17 %
4 - 6 %
0.8 - 1.5 %
0.6 - 1.5 %
The alloy has been designed to resist erosion corrosion or cavitation experienced in hydraulic applications. General areas for applications: Shafts, propellers, spindles, bolts, etc.
S165M is designed for application in slightly corrosive environment. Corrosion resistance is at the level of AISI 304L in most environments, however insensitive to intergranular corrosion.
Austenitize and quench from 950 to 1050°C and immediate temper at 600°C for 8 hours followed by cooling in air.
Good, the low carbon martensite with the finely dispersed residual austenite yields an excellent HAZ toughness in the as welded condition. Preheating to 100°C – 200°C is suggested for very thick section or when the stress concentration after cooling require it.
This material data has been provided by Sverdrup Steel.