55HGR

For the manufacture of spring strip steel of thickness 3 — 24 mm.

Classification

Country Section Category
CIS, Russia, Ukraine Structural steel Spring-spring structural steel

Chemical composition

Standard Fe, % Si, % B, % Mn, % Cr, % Cu, % Ni, % P, % C, % S, %
GOST 14959-79 > 96.107 0.17–0.37 0.001–0.003 0.9–1.2 0.9–1.2 < 0.2 < 0.25 < 0.035 0.52–0.6 < 0.035

Information on suppliers

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{P}$$, $$MPa$$ $$\psi$$, % d5, % Treatment
Hire GOST 14959-79 1270 1175 35 7 Tempering 850 ° C, oil, leave 470 ° C

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Hire GOST 14959-79 raw 302
Hire GOST 14959-79 heat-treated 269

Critical point temperatures

Ac1, K Ac3(Acm), K Mn, K
750 790 260

Analogues

USA Germany
H51601 1.7190 (58CrMnB4)

Standards

Standard Description
GOST 14959-79

Description of chemical elements

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

Description of mechanical properties

Parameter Units of measurement Description
d5 % Elongation at break
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength
$$\sigma_{P}$$ $$MPa$$ Proportionality limit
$$\psi$$ % Reduction in cross section on fracture

Description of temperatures of critical points

Parameter Units of measurement Description
Ac1 K
Ac3(Acm) K
Mn K