Cov pa roj carbon steel, cov hlau tsis zoo, thiab cov hlau tsis muaj hlau yog txhua yam khoom siv hlau uas sib txawv hauv lawv cov khoom, cov khoom, thiab kev siv.
Cov pa roj carbon steel yog cov hlau uas muaj cov ntsiab lus siab carbon, thiab nws cov ntsiab lus carbon feem ntau nyob nruab nrab ntawm 0.2 feem pua thiab 2.1 feem pua. Cov pa roj carbon steel muaj siab hardness, siab zog, thiab zoo hnav tsis kam, tab sis nws cov toughness tsis zoo thiab nws yog feem ntau tawg. Cov pa roj carbon steel yog dav siv hauv kev tsim cov bearings, zog, tshuab cuab yeej, qhov chaw pib, thiab lwm yam.
Ordinary steel (tseem hu ua low-alloy steel) muaj tsawg alloying Cheebtsam, feem ntau yog hlau thiab carbon. Ordinary steel muaj zoo toughness thiab plasticity thiab muaj zog forgeability, tab sis nws hardness thiab lub zog yog tsawg. Ordinary steel feem ntau yog siv rau hauv cov vaj tse, cov pob zeb ua vaj tse, txuas hniav, boilers thiab lwm yam.
Stainless hlau yog cov hlau uas muaj chromium, uas muaj kev tiv thaiv corrosion thiab oxidation tsis kam. Nws cov khoom tseem ceeb yog lwm cov khoom xws li hlau, carbon, chromium thiab ib qho me me ntawm npib tsib xee. Stainless hlau yog dav siv nyob rau hauv high-kev thov teb xws li tshuaj lom neeg kev lag luam, kws, thiab ua zaub mov.
Txawm hais tias cov khoom ntawm cov khoom siv hlau no txawv, lawv txhua tus muaj lawv tus kheej qhov zoo thiab daim ntawv thov. Hauv kev siv sib txawv, xaiv cov khoom tsim nyog tuaj yeem ua kom muaj kev ua haujlwm zoo thiab kev pabcuam lub neej.