FIELD: metallurgy.
SUBSTANCE: invention relates to dispersion-hardening martensite stainless steel used for making parts of pumps with plunger back-and-forth movement. Steel contains, wt %: carbon in amount of 0.08 and 0.18, chromium in amount between 10.50 and 14.00, nickel in amount between 0.65 and 1.15, copper in amount between 0.85 and 1.30, the rest is iron and the primary released phase containing copper.
EFFECT: longer service life of manufactured parts of pumps.
26 cl, 6 dwg, 3 tbl
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