Patent ID: 7258720

Claim:
A metal powder composition for use in selective laser sintering, comprising: an iron-based powder material; a nickel and/or nickel alloy powder material; a copper and/or copper alloy powder material; and a graphite powder material; wherein at least one of a condition that the iron-based powder material comprises a chrome molybendum steel powder material and a condition that the copper alloy powder material comprises a copper manganese alloy powder material is satisfied and wherein a proportion of the chrome molybdenum steel powder material ranges from 60 weight percent to 80 weight percent, a proportion of the nickel powder material ranges from 15 weight percent to 25 weight percent, a proportion of the copper manganese alloy powder material ranges from 5 weight percent to 15 weight percent, and a proportion of the graphite powder material ranges from 0.2 weight percent to 0.75 weight percent.