1.1157 (40Mn4)

Classification

Country Section Category
Germany Non-alloy Special Steels Structural Pressure Vessel and Engineering Steels with C < 0,5%

Chemical composition

Standard Fe, % Si, % Mn, % P, % C, % S, %
97.89–98.59 0.25–0.5 0.8–1.1 < 0.035 0.36–0.44 < 0.035

Information on suppliers

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{Y}$$, $$MPa$$ $$\epsilon_L$$, % $$\psi$$, % $$KU$$, $$J$$ Treatment
< 16 880–1030 > 635 < 12 < 40 < 35 After hardening and tempering
17–40 780–930 > 540 < 14 < 45 < 40 After hardening and tempering
41–100 690–830 > 440 < 15 < 50 < 40 After hardening and tempering

Brinell hardness number

Rolling Standard Classifiers Value, HBW
soft, annealing < 217

Analogues

CIS, Russia, Ukraine
40g
40gr

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
P % Phosphorus
C % Carbon
S % Sulfur

Description of mechanical properties

Parameter Units of measurement Description
$$\sigma_{Y}$$ $$MPa$$ Yield strength
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength
$$\epsilon_L$$ % Elongation at break (longitudinal)
$$\psi$$ % Reduction in cross section on fracture
$$KU$$ $$J$$ Impact energy