1.5531 (30MnB5)

Classification

Country Section Category
Germany Structural, Pressure Vessel and Engineering Steels B, Mn-B Mn < 1.65%

Chemical composition

Standard Fe, % Si, % B, % Mn, % P, % C, % S, %
EN 10083-3 97.755–98.5792 < 0.4 0.0008–0.005 1.15–1.45 < 0.025 0.27–0.33 < 0.035

Information on suppliers

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\epsilon_{L (L_0 = 5.65\sqrt{S_o})}$$, % $$R_{eH}$$, $$MPa$$ $$\psi$$, % Treatment
< 16 moderate hardening 950–1150 13 800 50
16–40 moderate hardening 800–950 13 650 50

Standards

Standard Description
EN 10083-3

Description of chemical elements

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

Description of mechanical properties

Parameter Units of measurement Description
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength
$$\epsilon_{L (L_0 = 5.65\sqrt{S_o})}$$ % Elongation at break (longitudinal) (for L0 = 5.65√So)
$$R_{eH}$$ $$MPa$$ Upper yield point
$$\psi$$ % Reduction in cross section on fracture