Cov phaj hlau muaj ntau yam khoom siv, suav nrog ntau yam; tsis tas yuav yog cov hlau stainless hlau. Stainless hlau phaj tuaj yeem hu ua&"steel phaj &".
Cov phaj hlau yog cov hlau tiaj tus uas tau nchuav nrog cov hlau yaj thiab nias tom qab txias. Cov hlau hlau tau muab faib ua kub dov thiab txias txias raws li dov. Raws li cov hom hlau, muaj cov hlau zoo tib yam, cov hlau zoo, cov hlau tsis muaj hlau, lub caij nplooj ntoo hlav, cov hlau tsis muaj steel, cov cuab yeej hlau, cov hlau tiv tshav kub, cov hlau, cov hlau silicon thiab cov ntawv hlau huv huv. Raws li lub hom phiaj kev tshaj lij, muaj: roj nruas, txha hniav laus, mos txwv, thiab lwm yam; raws li txheej txheej txheej, muaj cov ntawv galvanized, cov ntawv sib dhos, cov ntawv ua cov plated, cov yas yas sib txuas, thiab lwm yam.
Hlau yog" hlau-carbon hlau" nrog cov ntsiab lus carbon tsawg dua 2%. Cov hlau no hu ua&"carbon steel &". Cov hlau carbon tau muab faib ua cov hlau qis, cov pa roj carbon nruab nrab thiab cov hlau siab raws li cov ntsiab lus carbon. Qhov ntxiv ntawm lwm qhov kev koom ua ke hauv cov hlau hu ua&"hlau alloy &". Lub hom phiaj ntawm smelting hlau hlau yog kom tau raws li qhov xav tau ntawm kev tsim khoom thiab lub neej.
Cov hlau tsis muaj hlau yog ib hom hlau hlau, nrog ntau cov hlau sib xyaw ua ke xws li Ci thiab Ni ntxiv, thiab muaj ntau hom. Cov hlau tsis sib xws tau muab faib ua&"; ferritic stainless hlau &" thiab" austenitic stainless hlau".
Lawv muaj pes tsawg leeg sib txawv, cov hlau tsis xeb yuav tsis xeb, cov pa roj carbon tau yooj yim rau xeb.
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