Low carbon martensitic stainless steel 1.4418, X4CRNIMO16-5-1, Z8CND17.04, S165M, in accordance with EN 10088-1, AIR 9160. 1.4418 Chemical composition: Carbon C: ≤0.06 Silicon Si: ≤0.70 Manganese Mn: ≤1.50 Phosphorus P : ≤0.04 Sulfur S: ≤0.030 Chromium Cr: 15.00~17.00 Molybdenum Mo: 0.80-1.50 Nickel Ni: 4.00-6.00 Nitrogen N: ≥0.02 1.4418, X4CrNiMo16-5-1 – Specifications and Applications X4CrNiMo16-5-1 is better One of the martensitic grades with adequate corrosion resistance, good strength properties and high hardness with reduced carbon content. The steel has very good strength and corrosion resistance of welded joints, fatigue resistance, very good parameters in low temperature environments, and corrosion resistance comparable to austenitic steel 18-8. In addition, it has good solderability. Materials supplied mainly in rod form are used in the production of valves, turbine sub-assemblies, nuts and bolts, shafts, pins, pistons, main shafts, crankshafts, agitators in the chemical, energy, marine, shipbuilding, aerospace/cryogenic industries. Mechanical Properties Yield Strength RP0.2 MPA Tensile Strength RM MPA Elongation [%] Hardness [HB] Bar ≥750 900 – 1100 ≥16 280 – 340 QT900 920 1050 18 300

Heat treatment process reference: Austenitizing and quenching at 950 to 1050 °C, and immediately tempering at 600 °C for 8 hours, then cooling in air. How is the weldability? Good, low-carbon martensite with finely dispersed retained austenite produces excellent HAZ toughness under welding conditions. Preheating to 100°C – 200°C is required for very thick sections or for stress concentrations after cooling.