The invention provides an
alloy material for a
petroleum valve rod. The
alloy material for the
petroleum valve rod comprises the following chemical components in percentage by weight: 0.04-0.08% of C,not more than 0.35% of Si, not more than 0.35% of Mn, not more than 0.015% of P, not more than 0.015% of S, 0.30-0.80% of Al, 0.002-0.006% of B, 17.0-21.0% of Cr, 2.80-3.30% of Mo, 50.0-55.0% of Ni,4.75-5.50% of Nb+Ta, 0.75-1.15% of Ti, not more than 0.001% of Pb, not more than 0.0005% of Bi, not more than 0.0005% of Ag, not more than 0.01% of Ca, not more than 0.01% of Mg, not more than 0.20% of Cu, not more than 1.0% of Co and the balance of Fe and inevitable impurities. According to the
alloy material for the
petroleum valve rod, by adopting a vacuum
smelting and electroslag remelting duplex
smelting method, Ni-Mg alloy is added for deoxidation through refining, so that the alloy purity can be improved,
impurity inclusions are reduced, sufficient alloy degassing and uniform metallographic structure and chemical components are guaranteed, the prepared alloy material possesses excellent high-temperature strength,
wear resistance and
corrosion resistance and is applied to manufacturing of petroleum valve rods, the comprehensive performance of the petroleum valve rod can be improved, and the service life of the petroleum valve rod is prolonged.