1.8515 31CrMo12


31CrMo12 Germany France England EU Italy
31CrMo12 30CD12 722M24 31CrMo12 31CrMo12


1.8515 is nitriding steel for relatively large cross-sections, and also for higher nitriding hardnesses as a result of its chemical composition. Suitable for gear wheels, cylinders, drills, connecting rods, shafts, extruders, guides, straightening rolls, thread gauges with relatively large cross-sections.



C Si Mn  p s Cr Mo NI V Al
0,28-0,35 0,40 0,40-0,70 0,025 0,030  2,80-3,30 0,30-0,50 0,30


Hot working:

Forging temperature range: 1200-850℃
Note: Heat to 1200 ℃. Do not forge below 850.
Heat treatment:

Hardening temprature(℃) for quenching in water Hardening temprature(℃) for quenching in oil Hardening temprature(℃) for quenching in air Temper After mech. Machining stress relieving at Nitride Nitrocarburation
870-910 570-700 550-570 500-520 570-580

Main application:Nitriding steel for parts up to 280 mm ∅Shape of product:.round, flat, step shape, ring, disc, shaft, other shape depend on customer needs