SA387 / ASTM A387 GR 12 CLASS 2

SA387 / ASTM A387 GR 12 CLASS 2: Kev Pom Zoo

SA387 / ASTM A387 GR 12 CLASS 2 yog cov khoom siv tseem ceeb hauv thaj tsam ntawm kev lag luam fabrication thiab engineering. Txhawm rau kom tau txais kev nkag siab tob txog nws cov yam ntxwv thiab lub peev xwm, kev tshawb nrhiav tob tob ntawm nws cov ncauj lus kom ntxaws, suav nrog cov ntaub ntawv tus lej, yog qhov tseem ceeb.

Cov tshuaj muaj pes tsawg leeg ntawm SA387 / ASTM A387 GR 12 CLASS 2 yog kev txiav txim siab zoo. Feem ntau, nws suav nrog cov ntsiab lus xws li carbon (kwv yees 0}05% rau 0.17%), manganese ({{10}}}.3{{14 }}% ​​rau {{20}}.60%), silicon (0.50% txog 0.80%), chromium (1.00% mus rau 1.50%), thiab molybdenum (0.45% rau 0.65%) %). Qhov tseeb piv ntawm cov ntsiab lus no ua rau pom qhov txawv ntawm cov hlau.

Cov ntsiab lus carbon nyob rau hauv qhov kev txiav txim siab no cuam tshuam qhov hardness thiab lub zog ntawm cov khoom. Manganese pab txhawb kom nws toughness thiab ductility. Silicon plays lub luag haujlwm hauv kev txhim kho cov hlau deoxidation thaum lub sijhawm tsim khoom. Chromium imparts nce hardness, kub kuj, thiab corrosion kuj. Molybdenum boosts lub siab kub lub zog thiab creep kuj.

Thaum nws los txog rau cov khoom siv kho tshuab, SA387 / ASTM A387 GR 12 CLASS 2 qhia txog cov yam ntxwv zoo kawg li. Lub zog tensile feem ntau spans ntawm 485 MPa rau 620 MPa, qhia tias nws muaj peev xwm ua rau muaj zog rub tawm ntau heev. Lub zog tawm los yog kwv yees li 275 MPa rau 345 MPa, cim qhov pib ntawm cov yas deformation. Qhov elongation ntawm pob txha feem ntau yog li ntawm 22% mus rau 25%, qhia txog nws cov ductility thiab muaj peev xwm deform yam tsis muaj kev tawg.

Qhov nyuaj ntawm qib no tuaj yeem hloov pauv ntawm 137 HB thiab 187 HB, cuam tshuam raws li kev kho cua sov tshwj xeeb thiab kev ua haujlwm. Qhov hardness no tso cai rau hnav tsis kam thiab ua haujlwm ntev rau ntau hom kev siv.

Cov yam ntxwv ntawm qhov kub thiab txias ntawm SA387 / ASTM A387 GR 12 CLASS 2 yog qhov tseem ceeb heev. Nws tuaj yeem tiv taus qhov kub thiab txias yam tsis muaj kev cuam tshuam loj heev hauv nws cov khoom siv kho tshuab. Qhov no ua rau nws tsim nyog rau kev siv nyob rau hauv qhov chaw uas muaj qhov kub thiab txias, xws li nyob rau hauv lub zog tsim hluav taws xob thiab petrochemical domains.

Qhov kev tiv thaiv corrosion ntawm qib steel no muaj qhov tseem ceeb heev. Kev sib xyaw ua ke ntawm cov ntsiab lus alloying pab tiv thaiv nws tiv thaiv kev cuam tshuam corrosive ntawm ntau yam khoom, ua kom nws lub neej kev pab cuam ntev hauv qhov chaw nruj heev.

Hais txog kev siv, SA387 / ASTM A387 GR 12 CLASS 2 pom kev siv dav hauv kev tsim kho cov hlab ntsha siab, boilers, thiab cov khoom siv hluav taws xob hauv lub zog tsim hluav taws xob. Nyob rau hauv kev lag luam petrochemical, nws yog ua hauj lwm nyob rau hauv reactors, distillation kab, thiab piping systems uas tswj kub kub thiab corrosive tshuaj.

Hauv kev tsim cov tshuab thiab cov khoom siv, nws tuaj yeem txheeb xyuas cov khoom xws li lub zog, ncej, thiab cov kabmob, qhov sib xyaw ua ke ntawm lub zog, toughness, thiab hnav tsis kam ua pov thawj tseem ceeb.

Aerospace thiab automotive industries kuj sau cov txiaj ntsig ntawm nws cov khoom. Nyob rau hauv aerospace, nws yuav siv tau nyob rau hauv lub cav Cheebtsam thiab cov yam ntxwv qhov chaw uas xav tau high-temperature kuj thiab lub zog. Nyob rau hauv lub automotive domain, nws muaj peev xwm muab tso rau hauv lub cav qhov chaw thiab ncua kev kawm ntawv systems uas yuav tsum tau tiv thaiv cov kev ua hauj lwm nyuaj.

Tsis tas li ntawd, hauv kev tsim kho thiab kev tsim kho vaj tse, qib steel no tuaj yeem ua haujlwm hauv cov qauv tsim uas raug rau cov khoom hnyav thiab hnyav ib puag ncig.

Hauv cov ntsiab lus, SA387 / ASTM A387 GR 12 CLASS 2 yog cov khoom siv zoo nrog cov tshuaj muaj pes tsawg leeg thiab tshwj xeeb txhua yam, kub tsis kam, thiab corrosion kuj zoo. Nws cov ntawv thov dav dav thoob plaws ntau qhov kev lag luam ua rau nws yog qhov kev xaiv tseem ceeb rau ntau hom engineering thiab kev tsim khoom. Kev tshawb fawb tsis tu ncua thiab kev txhim kho kev ua haujlwm zoo yuav ua kom zoo dua nws cov kev ua tau zoo thiab nthuav dav nws daim ntawv thov kom tau raws li qhov kev xav tau hloov pauv tas li ntawm cov thev naus laus zis niaj hnub thiab kev lag luam.

Cim npe nrov: SA387 / astm a387 gr 12 chav kawm 2, Tuam Tshoj sa387 / astm a387 gr 12 chav kawm 2 lwm tus neeg, Hoobkas