Materials database

CrMoV nitriding and warm-work steel — Cr 1.2-1.5%, Mo 0.45-0.65%, V 0.25-0.35%. Lower Cr than 30CrMoV9 (2.3-2.7%) but higher Mo — better creep resistance at elevated temperature. Used for warm-work tools (forging dies to 400°C), nitrided piston rings, and power generation components. Also specified in EN 10269 for fasteners at elevated temperature.

THE Cr-Mo-V nitriding steel — Cr 2.3-2.7% forms hard CrN nitrided case (800 HV surface). V addition for secondary hardening. Core QT to UTS 1080-1270 MPa before nitriding at 570-580°C. Used for piston rods, valve stems, cylinder liners, turbine parts, and any component needing extreme surface hardness + fatigue resistance without distortion (low nitriding temp).

Deep nitriding steel with 3% Cr — the highest Cr content in the EN 10085 nitriding series. Produces the deepest and hardest nitrided case (surface hardness >900 HV, case depth >0.5mm). Core strength 800-1000 MPa QT. Used where maximum surface hardness and wear resistance with a tough core is needed: large gears, cylinder liners, spindles, precision measuring tools, and heavy-duty sliding components.

THE standard nitriding steel — Cr-Mo-V combination optimized for gas nitriding. Vanadium refines grain and forms hard VN nitrides (surface >750 HV). Better core toughness than 31CrMo12 at similar strength. THE default choice when "nitriding steel" is specified without further detail. Used for crankshafts, gears, spindles, extrusion screws, and precision machine components.

Premium CrMoV nitriding steel with highest Cr (3%) and Mo (1%) in the nitriding series — designed for maximum core strength after nitriding. Higher strength than 31CrMoV9 and 31CrMo12. AMS 6481 for aerospace. THE gun barrel material. Nitrided surface reaches 860+ HV while maintaining tough core at 415 HV. Used for gun barrels, high-performance gears, ball bearing races, crankshafts, and components requiring the ultimate combination of core strength + surface hardness.

Premium nitriding steel with high chromium content (2.8–3.3%) providing exceptional surface hardness after gas or plasma nitriding (up to 900 HV). Excellent core strength (900–1100 MPa tensile) with good toughness. Used for gears, crankshafts, cylinders, spindles, and precision machine components in aerospace, automotive, and power generation. Also known as 32CDV13 (AFNOR) and AMS 6481.

THE classic aluminum-containing nitriding steel — Al 0.8-1.2% forms extremely hard AlN nitrided layer (900-1100 HV surface). Cr 1.0-1.3% + Ni 0.85-1.15% provide core strength. Highest achievable surface hardness of all nitriding steels. Used for cylinder liners, piston rings, crankshafts, spindles, and gauges where maximum nitrided hardness is critical. Also known as 34CrAlNi7-10.