W.NR. 1.2510

Medium alloyed cold work steel with good hardening capacity, high wear resistance, dimensionally stable during heat treatment.
Its applications are small tools for cutting and punching, shear knives, thread rolling tools, measuring tools, wood working tools.

Comparable standards

DIN	W.Nr	AFNOR	AISI/ASIM	JIS
100MnCrW4	1.2510	95MnWCr5	O-1	SKS3

Chemical composition (typical; in weight %)

C	Si	Mn	P (max)	S (max)	Cr	W	V
0.90-1.05	0.15-0.35	1.00-1.20	0.035	0.035	0.50-0.70	0.50-0.70	0.05-0.15

Critical points

Ac1 740 °C

Ac3 770 °C

Ms 215 °C

Production technology

EAF – LF – VD - Forging – Heat treatment +A

US specification

In according to standard EN10228-3 Class 4 and standard SEP 1921 Class E/e

Delivery condition

WW.NR. 1.2510 is delivered in annealed condition, with hardness max 230 HB (21 HRC).

Physical properties (reference values)

	20°C	100°C	250°C	500°C
Thermal expansion coefficient (10-6/K)	11.4	11.7	12	12.7
Thermal conductivity (W/mk)	29.9	30.1	31.7	31.2
Young modulus (Kn/mm2)	212	209	200	175

Heat treatment

TREATMENT		TEMPERATURE	HOLDING TIME (HT)	COOLING	COMMENTS
Annealing		Heat to 700 - 720 °C	Min. H.T. for 2 minute /mm	Furnace to 600°C than in air	-
Stress relieving		Heat to 600 - 650 °C	Min. H.T. for 2 minute /mm	Air or furnace	-
Hardening		Heat to 790-820 °C	Min. H.T. for 1 minute /mm	Oil or pressure gas (vacuum)	-