Ductile cam khwb cia hlau yog ib yam ntawm cov khoom muaj zog cam khwb cia hlau tsim nyob rau xyoo 1950s.Nws txoj kev ua tau zoo yog ze rau cov hlau.Nws yog raws li nws cov kev ua tau zoo heev uas nws tau ua tiav siv rau casting qee qhov chaw nrog kev quab yuam, siab zog, toughness thiab hnav tsis kam.Ductile hlau tau tsim sai sai rau hauv cov khoom siv cam khwb cia hlau thib ob tsuas yog grey cam khwb cia hlau.Lub thiaj li hu ua "steel es tsis txhob steel", feem ntau yog hais txog cov hlau ductile.

Ducular hlau yog spherical graphite los ntawm spherulation thiab gestation kev kho mob, uas zoo txhim kho cov neeg kho tshuab zog ntawm cam khwb cia hlau, tshwj xeeb tshaj yog cov yas thiab toughness, thiaj li yuav tau txais lub zog siab dua carbon steel.

cam khwb cia hlau yog cov ntsiab lus carbon ntau tshaj 2.11% ntawm cov hlau carbon alloy, los ntawm cov npua hlau, cov hlau seem thiab nws cov ntaub ntawv hlau tom qab kub melting thiab casting txheej txheem, ntxiv rau Fe, carbon thiab lwm yam cam khwb cia hlau hauv graphite daim ntawv, yog cov nag lossis daus ntawm graphite sawb ntawm cam khwb cia hlau hu ua grey cam khwb cia hlau los yog grey cam khwb cia hlau, worm cam khwb cia hlau hu ua worm number case hlau, ib pawg ntawm cam khwb cia hlau hu ua dawb cam khwb cia hlau los yog code hlau, thiab spherical cam khwb cia hlau yog hu ua spherical number case cam khwb cia hlau.

Cov tshuaj muaj pes tsawg leeg ntawm cov hlau tsis yog hlau feem ntau yog: carbon cov ntsiab lus 3.0 ~ 4.0%, silicon cov ntsiab lus 1.8 ~ 3.2%, manganese, phosphorus, sulfur tag nrho tsis pub tshaj 3.0% thiab tsim nyog tus nqi ntawm lub ntiaj teb tsawg, magnesium thiab lwm yam globtized ntsiab.