Definition of case-harden in English:

case-harden

Syllabification: case-hard·en

verb

[with object] (often as adjective case-hardened)
  • 1Harden the surface of (a material): case-hardened sandstones
    More example sentences
    • When the stone was properly seasoned, the exposed surfaces were case-hardened, creating a finish more resistant to weathering.
  • 1.1Give a hard surface to (iron or steel) by carburizing it: a case-hardened steel anvil
    More example sentences
    • The bolts are similarly machined from case-hardened steel alloy.
    • Fusion-welded overlays have strong bonds, but the primary surface-hardened steels used in wear applications with fatigue loads include heavy case-hardened steels and flame or induction-hardened steels.
    • It is made of 14-gauge steel and features a pry-resistant door that locks with four half-inch diameter, case-hardened steel bolts.
  • 1.2Make (someone) callous or tough: a case-hardened politician
    More example sentences
    • But those same flames also case-hardened developing nations.
    • But, regardless of how well the interviewers are trained, case-hardened criminals are unlikely to take these bogus coppers seriously, and might find it easy to ‘pull the wool over their eyes’.
    • Sometimes, even when you are a case-hardened professional, you see history differently.

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