1.5663 (X7Ni9)

Classification

Country Section Category
Germany Structural, Pressure Vessel and Engineering Steels Ni

Chemical composition

Standard Fe, % Si, % Mn, % Ni, % V, % P, % C, % S, % Mo, %
EN 10028-4 88.62–91.2 < 0.35 0.3–0.8 8.5–10 < 0.01 < 0.015 < 0.1 < 0.005 < 0.1

Information on suppliers

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{Y}$$, $$MPa$$ $$\epsilon_L$$, % $$KV_{L}$$, $$J$$ $$KV_{T}$$, $$J$$ Treatment
< 50 moderate hardening 680–820 18 120 100
< 30 moderate hardening 585
30–50 moderate hardening 575

Standards

Standard Description
EN 10028-4

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Ni % Nickel
V % Vanadium
P % Phosphorus
C % Carbon
S % Sulfur
Mo % Molybdenum

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)
$$KV_{L}$$ $$J$$ Impact energy (longitudinal)
$$KV_{T}$$ $$J$$ Impact energy (transverse)