Patent ID: 11879168
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  F | IPC C  F

Claim 7:
8. A gray cast iron cylinder liner comprising:
from about 2.60 weight percent (wt %) to about 3.30 wt % Carbon (C);
from about 1.50 wt % to about 2.30 wt % Silicon (Si);
from about 0.30 wt % to about 0.80 wt % Manganese (Mn);
from about 0.15 wt % to about 0.35 wt % Phosphorus (P);
from about 0.05 wt % to about 0.11 wt % Sulphur (S);
from about 0.60 wt % to about 1.20 wt % Copper (Cu);
from about 0.10 wt % to about 0.30 wt % Chromium (Cr);
from greater than 0.0 wt % to 0.1 wt % Nickle (Ni);
from about 0.15 wt % to about 0.40 wt % Molybdenum (Mo); and
balance wt % Iron (Fe); and wherein
Mn %*S % is from about 0.025 to about 0.045, and
Carbon Equivalent (CE)=C+[1/3(Si+P)] is from about 3.00 wt % to 3.90 wt %;
wherein the gray cast iron cylinder liner is a centrifugally cast cylinder liner, comprising:
a modulus of elasticity from about 137 GPa to about 143 GPa; and
an ultimate tensile strength from about 330 MPa to about 380 MPa.