فولادهای نیتروراسیون

1.8515

31CrMo12

31CrMo12	Germany	France	England	EU	Italy
	DIN,WNr	AFNOR	BS	EN	UNI
	31CrMo12	30CD12	722M24	31CrMo12	31CrMo12
	1.8515

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.

Composition:

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

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