Kev faib khoom siv: Cov kws tshaj lij kev lag luam feem ntau paub qhov txawv ntawm cov hlau tsis muaj steel rau hauv 200 series, 300 series, thiab 400 series, uas yog ib txoj hauv kev raws li Asmeskas tus qauv rau kev faib qib. Cov qib tshwj xeeb yog siv los sib txawv ntawm cov koob no:
200 series suav nrog 201 thiab 202,
300 series suav nrog 304 thiab 316,
400 series suav nrog 410 thiab 430.
Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias, raws li lub teb chaws tus qauv, tsuas yog qib 300 thiab 400 series tau lees paub. Cov no tuaj yeem muab faib ua tsib hom: ferritic, martensitic, austenitic, duplex, thiab nag lossis daus hardening. Raws li kev sib xyaw ua ke, stainless hlau tuaj yeem muab faib ua chromium series, chromium-nickel series, thiab chromium-nickel-manganese series.
Common Stainless Hlau
304 thiab 316 yog ob qho khoom siv dav tshaj plaws hauv 300 series. 304 yog cov feem ntau siv stainless hlau vim nws zoo tag nrho cov kev ua tau zoo, nrog rau siab elongation, zoo weldability, thiab zoo heev corrosion kuj. Nws tuaj yeem hloov yuav luag txhua daim ntawv thov uas siv cov hlau (tshwj tsis yog cov kev xav tau siab zog). 316 tau tsim los ntawm 304, feem ntau los ntawm kev ntxiv molybdenum (Mo) los txhim kho corrosion kuj, ua rau nws haum rau cov ntug dej hiav txwv ib puag ncig.
430 yog cov khoom siv feem ntau siv hauv 400 series. Hauv cov khoom siv hauv tsev, chav ua noj, thiab chav dej, 430 yog ib qho khoom siv zoo rau 304 stainless hlau. Txawm li cas los xij, vim nws qhov qis elongation thiab tsis zoo weldability, nws qhov kev siv tsawg dua li ntawm 304. 410S yog qhov feem ntau siv qis-chromium (Cr Tsawg dua lossis sib npaug li 13.5%) stainless hlau, feem ntau pom hauv cov khoom qis qis xws li riam, diav rawg, diav, thiab phiab.
Lub 200 series sib txuas cov txheej txheem zoo ntawm 300 series nrog tus nqi-zoo ntawm 400 series, ua rau nws yog ib qho khoom siv nrov. Nws siv yog thib ob nkaus xwb rau 300 series (nrog rau kev muag khoom piv ntawm 300: 200: 400 yog kwv yees li 5: 3: 2). Ntxiv nrog rau cov lus hais yav dhau los stainless hlau, kev siv ntawm lwm hom yog qhov tsawg. Piv txwv li, martensitic stainless hlau (410/420) yog siv rau rooj riam thiab diav rawg, ultra-ntshiab ferritic stainless hlau (409, 441) yog siv nyob rau hauv automotive tso systems, duplex stainless hlau (2507) yog siv nyob rau hauv lub petrochemical kev lag luam, thiab nag lossis daus hardening stainless hlau (630) yog siv hauv kev lag luam hluav taws xob.
