### 1. A36 piv rau lwm hom hlau li cas?
ASTM A36 steel yog ib qho ntawm cov pa roj carbon steel ntau tshaj plaws siv hauv kev tsim kho thiab siv cov qauv siv dav dav. Nws cov yam ntxwv tseem ceeb yog:
* ** Cov ntsiab lus qis Carbon: ** Nws muaj cov ntsiab lus qis carbon, uas ua rau nws yooj yim rau vuam thiab tsim.
* ** Lub Zog Zoo: ** Nws muaj qhov tsawg kawg nkaus tawm lub zog ntawm 36,000 psi (250 MPa), uas yog txaus rau ntau yam qauv thav duab, vaj tse, thiab txuas hniav.
* ** Ductility: ** Nws yog ductile heev, txhais tau tias nws tuaj yeem khoov thiab deform ua ntej tawg, uas yog qhov muaj kev nyab xeeb hauv cov qauv.
** Sib piv rau lwm tus:**
** Vs. High-Carbon Steels (xws li 1095):** A36 yog softer, weaker, tab sis deb dua ductile thiab weldable. High- carbon steels yog ib qho nyuaj thiab muaj peev xwm tuav tau ib tug ntse ntug, ua rau lawv haum rau riam thiab cov cuab yeej, tab sis lawv yog nkig thiab nyuaj rau welding.
** Vs. Alloy Steels (xws li 4140): ** Alloy steels zoo li 4140 yog qhov muaj zog thiab nyuaj dua A36 vim qhov sib ntxiv ntawm cov ntsiab lus xws li chromium thiab molybdenum. Lawv yog siv rau siab - qhov kev ntxhov siab xws li qag thiab lub zog, tab sis lawv kim dua thiab xav tau kev saib xyuas ntau dua thaum vuam.
** Vs. Stainless Steels (zoo li 304): ** A36 tsis muaj corrosion kuj thiab yuav xeb yooj yim, thaum stainless hlau muaj chromium los ua ib tug passive xeb- resistant txheej. Stainless hlau yog kim dua thiab feem ntau muaj cov yam ntxwv sib txawv.
Nyob rau hauv luv luv, A36 yog ib tug dav -lub hom phiaj, tus nqi- zoo steel xaiv rau nws weldability thiab ductility es tsis yog nws qhov kawg lub zog los yog hardness.
### 2. Dab tsi yog qhov muaj zog dua A36?
Ntau hom hlau muaj zog dua A36. Lub zog hauv cov hlau feem ntau ntsuas los ntawm nws qhov ** tawm dag zog lub zog ** (lub ntsiab lus uas nws pib deform mus tas li). Nov yog qee qhov piv txwv ntawm cov hlau muaj zog:
* **High-Strength Low-Alloy (HSLA) Steels (piv txwv li, ASTM A572 Qib 50):** Cov no yog lwm txoj hauv kev rau A36. Qib 50, piv txwv li, muaj qhov tsawg kawg nkaus tawm lub zog ntawm 50,000 psi (345 MPa), ua rau nws li 36% muaj zog dua A36.
* **Abrasion-Resistant (AR) Steels (xws li, AR400, AR500):** Cov no yog cov hlau tawv heev tsim los tiv thaiv hnav thiab puas. Lawv muaj siab hardness thiab lub zog, tab sis tsis tshua muaj ductile.
* ** Alloy Steels (xws li, 4140):** Qhov no yog ib qho nruab nrab -carbon, chromium-molybdenum alloy steel paub rau nws lub zog siab, toughness, thiab zoo qaug zog. Nws yog feem ntau siv nyob rau hauv automotive thiab aerospace industries.
* **Quenched thiab Tempered (Q&T) Alloy Steels (xws li ASTM A514): ** Qhov no yog lub siab - lub zog steel nrog lub zog tawm los ntawm 100,000 psi (690 MPa) lossis siab dua, siv rau hauv kev thov siv xws li crane booms thiab khoom hnyav.
* ** Tool Steels (piv txwv li, D2, A2):** Cov no yog cov tawv heev, muaj zog, thiab hnav-cov hlau tiv taus tsim los ua cov cuab yeej thiab tuag.
* **Stainless Steels (xws li, 304, 316):** Txawm hais tias tsis yog ib txwm muaj zog ntawm cov khoom muaj zog, ntau qib stainless muaj zog tensile ntau dua thiab tswj lawv lub zog zoo dua ntawm qhov kub siab piv rau A36.
### 3. Qhov txawv ntawm ASTM thiab ASME hlau yog dab tsi?
ASTM thiab ASME yog ob lub koom haum Asmeskas sib txawv uas tsim cov qauv, thiab lawv txoj kev sib raug zoo tseem ceeb heev hauv kev lag luam steel thiab siab hlab ntsha.
* ** ASTM (American Society for Testing and Materials):** Lub koom haum no tsom rau kev txhais cov khoom siv nws tus kheej **. Lawv tsim cov qauv kev qhia rau cov khoom siv, cov khoom, cov tshuab, thiab cov kev pabcuam. ASTM tus qauv (xws li A36) qhia txog cov tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab (lub zog, ductility), qhov ntev, thiab cov qauv ntsuas rau qib steel.
* ** ASME (American Society of Mechanical Engineers):** Lub koom haum no tsom mus rau ** tsim thiab siv ** ntawm cov ntaub ntawv, tshwj xeeb tshaj yog nyob rau hauv boilers, siab hlab ntsha, thiab lwm yam mechanical Cheebtsam. ASME Boiler thiab Pressure Vessel Code (BPVC) yog cov txheej txheem tseem ceeb rau kev nyab xeeb.
**Qhov txawv tseem ceeb:**
ASTM txhais tau tias * steel yog dab tsi *. ASME txhais * siv cov hlau zoo li cas * hauv kev tsim.
**Qhov sib txawv:**
Feem ntau, ASME code yuav txais cov qauv khoom siv ASTM. Thaum nws ua, nws tau txais "S" ua ntej. Piv txwv li, ASTM A106 yog cov yeeb nkab specification. ASME version yog SA106. Lawv yog technically zoo tib yam, tab sis SA106 version tau txais los siv rau hauv ASME -cov cuab yeej siv tau ntawv pov thawj. ASME stamp ntawm lub nkoj lees paub tias nws tau tsim thiab tsim raws li ASME cov lej, siv cov ntaub ntawv ua tau raws li cov qauv tsim nyog (xws li SA36).
### 4. Puas yog ASTM A36 stainless hlau?
Tsis yog, ASTM A36 yog ** tsis yog stainless hlau **. Nws yog ** carbon steel **.
Qhov sib txawv tseem ceeb yog cov ntsiab lus chromium. Stainless hlau yuav tsum muaj qhov tsawg kawg nkaus ntawm 10.5% chromium, uas ua rau pom tsis pom, tiv thaiv oxide txheej uas tiv thaiv xeb. A36 steel tsuas muaj me me, cov kab ntawm chromium thiab muaj cov ntsiab lus hlau siab, yog li nws tsis muaj txheej tiv thaiv no thiab yuav xeb yooj yim thaum raug ya raws thiab huab cua.
### 5. Puas yog ASTM A36 steel xeb?
Yog lawm, ** ASTM A36 steel yuav xeb **.
Vim tias nws yog cov pa roj carbon steel nrog cov ntsiab lus hlau siab thiab tsis muaj cov ntsiab lus tseem ceeb xws li chromium rau corrosion kuj, nws raug oxidation (xeb) thaum raug oxygen thiab ya raws. Rau sab nraum zoov lossis corrosive ib puag ncig, A36 steel yuav tsum tau tiv thaiv nrog cov txheej xws li xim, galvanization (zinc txheej), lossis lwm yam kev tiv thaiv tiav kom tsis txhob xeb.
