R10F5K5 (EI931)

For the manufacture of semi-finishing and roughing tools for various difficult-to-cut materials.

Country	Section	Category
CIS, Russia, Ukraine	Tool steel	High speed tool steel

Standard	Fe, %	Si, %	Mn, %	Co, %	Cr, %	Ni, %	V, %	P, %	C, %	S, %	Mo, %	W, %
GOST 19265-73	68.89–75.25	< 0.5	< 0.4	5–6	4–4.6	< 0.4	4.3–5.1	< 0.03	1.45–1.55	< 0.03	< 1	10–11.5

Temperature, °C	$$\rho$$, $$\frac{kg}{m^3}$$
20	8950

Rolling	Standard	Classifiers	Value, HBW
Alloy	GOST 19265-73	annealing	285

Ac₁, K	Ac₃(Ac_m), K	Ar₁, K
825	850	740

CIS, Russia, Ukraine
ЭИ931

Standard	Description
GOST 19265-73

Parameter	Units of measurement	Description
$$\rho$$	$$\frac{kg}{m^3}$$	The density of the material