U8A

The temperature of the critical points of the alloy: Ac1 = 720, Ar1 = 700, Mn = 245. Hardness after annealing (GOST 1435−99): HB 10 -1 = 187 MPa /

tool, working in conditions that do not cause heating of the cutting edge: cutters, countersinks, axes, chisels, chisels, saws longitudinal and circular, rolling rolls, center punches, screwdriver, combined pliers, side cutters.

Classification

Country Section Category
CIS, Russia, Ukraine Tool steel Carbon Tool Steel

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Cu, % Ni, % P, % C, % S, %
GOST 1435-99 97.807–98.91 0.17–0.33 0.17–0.28 < 0.2 < 0.25 < 0.25 < 0.025 0.75–0.84 < 0.018

Information on suppliers

Physical characteristics

Temperature, °C $$\rho$$, $$\frac{kg}{m^3}$$ $$R\cdot 10^{-6}$$, $$\Omega\cdot m$$
20 7830 0.14

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\epsilon_L$$, % Treatment
Tape GOST 2283-79 cold-work 740–1180
Tape GOST 2283-79 annealing 640–740 10–15

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Alloy GOST 1435-99 annealing 1870

Critical point temperatures

Ac1, K Ar1, K Mn, K
720 700 245

Analogues

USA Germany
W108 1.1525 (C80W1)

Standards

Standard Description
GOST 1435-99

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Cr % Chrome
Cu % Copper
Ni % Nickel
P % Phosphorus
C % Carbon
S % Sulfur

Description of physical characteristics

Parameter Units of measurement Description
$$\rho$$ $$\frac{kg}{m^3}$$ The density of the material
$$R\cdot 10^{-6}$$ $$\Omega\cdot m$$ Electrical resistivity

Description of mechanical properties

Parameter Units of measurement Description
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength
$$\epsilon_L$$ % Elongation at break (longitudinal)

Description of temperatures of critical points

Parameter Units of measurement Description
Ac1 K
Ar1 K
Mn K