ZYTC Alloy is an ISO 9001 and AS 9120B certified superalloy manufacturer and supplier, offering Material 1.4418 at factory-direct prices with full material traceability and fast global delivery. 1.4418 stainless steel is a martensitic stainless steel specially designed for applications requiring high mechanical properties combined with improved corrosion resistance relative to traditional martensitic steels. This grade is ideal for applications requiring high strength, high hardness, and corrosion resistance similar to 304 stainless steel. It offers an excellent balance of mechanical performance and corrosion protection, making it a preferred choice for demanding engineering applications.
Specifications & Physical Data1.4418 is a chromium-nickel-molybdenum martensitic stainless steel with controlled carbon and nitrogen content. Its chemical composition provides a fine-grained microstructure that delivers high strength and hardness while maintaining good toughness and weldability. The alloy is often supplied in the quenched and tempered condition to achieve optimal mechanical properties. Available Forms: Bar (round, flat, hex), forging stock, plate, sheet, pipe, tube, and custom components Specifications: EN 10088-3, DIN 1.4418, UNS S165M (similar), WNr 1.4418 Equivalent Grades: X4CrNiMo16-5-1 (EN designation)
| Chemical Composition (Weight %) | 1.4418 Specification |
|---|
| Chromium (Cr) | 15.0 - 17.0 | | Nickel (Ni) | 4.0 - 6.0 | | Molybdenum (Mo) | 0.8 - 1.5 | | Carbon (C) | 0.04 - 0.08 | | Manganese (Mn) | 1.0 max. | | Silicon (Si) | 1.0 max. | | Phosphorus (P) | 0.040 max. | | Sulfur (S) | 0.015 max. | | Nitrogen (N) | 0.010 - 0.020 | | Iron (Fe) | Balance |
| Physical Properties | Metric | Imperial |
|---|
| Density | 7.75 g/cm³ | 0.280 lb/in³ | | Modulus of Elasticity | 200 GPa | 29.0 × 10⁶ psi | | Coefficient of Expansion (20-100°C) | 11.0 µm/m·°C | 6.1 µin/in·°F | | Thermal Conductivity | 15 W/m·K | 104 BTU·in/hr·ft²·°F | | Magnetic Properties | Ferromagnetic | — |
Mechanical Properties (Quenched & Tempered)| Property | Metric | Imperial |
|---|
| Tensile Strength (Rm) | 760 - 960 MPa | 110 - 139 ksi | | Yield Strength (Rp0.2) | ≥ 550 MPa | ≥ 80 ksi | | Elongation (A) | ≥ 16% | ≥ 16% | | Reduction of Area (Z) | ≥ 45% | ≥ 45% | | Hardness | 240 - 310 HB | 240 - 310 HB | | Impact Strength (KV) | ≥ 40 J at 20°C | ≥ 30 ft·lbf at 68°F |
Heat Treatment| Process | Temperature | Cooling | Purpose |
|---|
| Quenching | 1000-1050°C (1832-1922°F) | Oil or polymer | Austenitizing | | Tempering | 580-680°C (1076-1256°F) | Air cool | Achieve desired strength/toughness balance |
Note: Tempering should be performed at temperatures above 580°C to avoid temper embrittlement. Double tempering may be beneficial for critical applications requiring maximum toughness.
ApplicationsHydraulic Equipment: Pumps, valves, cylinders, piston rods Marine: Propeller shafts, seawater pumps, marine hardware (superior corrosion resistance in seawater) Hydroelectric: Turbine components, runner blades, guide vanes Oil & Gas: Downhole components, wellhead equipment, valve parts Chemical Processing: Pumps, valves, fittings for mildly corrosive media General Engineering: High-strength shafts, gears, fasteners requiring corrosion resistance
Contact ZYTC Alloy TodayRequest a quote for Material 1.4418 (X4CrNiMo16-5-1 / UNS S165M) – Martensitic Stainless Steel – High Strength & Hardness – Corrosion Resistance Similar to 304 – Quenched and Tempered . Please provide: Diameter / size (round, flat, forging stock) Length or weight required Product form (bar / forging / sheet / plate) Quantity Destination port Any special certification requirements
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