ASTM A537 Chav Kawm 3 yog dab tsi?

ASTM A537 Chav Kawm 3 yog dab tsi?

ASTM A537 Qib 3yog quenched thiab tempered carbon-manganese- silicon steel, feem ntau yog siv nyob rau hauv siab- zog, qis- mus rau- daim ntawv thov kub. Nws cov ntawv thov tseem ceeb suav nrog kev tsim khoomcov hlab ntsha siab, muaj boilers, cia tank, thiabkub exchangersnyob rau hauv cov roj, roj, thiab petrochemical sectors. Nws kuj yog siv rau cov khoom siv uas xav tau siab toughness.

ASTM A537 Chav Kawm 3 yog cov pa roj carbon -manganese- silicon alloy uas tau ua tiav thermally los ntawm cov kua quenching thiab tom qab tempering kom ua tiav qhov zoo tshaj plaws ntawm qhov sib npaug ntawm tensile lub zog thiab qhov tsis zoo. Nws yog tsim los txuas qhov sib txawv ntawm cov txheej txheem siab lub nkoj steel thiab cov nqi qis dua - alloy steels. Los ntawm kev ua tib zoo tswj cov ntsiab lus ntawm manganese (txog 1.60%) thiab cov cua txias thaum lub sij hawm quenching, cov hlau tsim cov hardenability uas yuav tsum tau los txhawb siab yield zog (60 ksi rau nyias daim hlau, 55ksi rau thicker phaj). Qhov no ua rau nws yog qhov kev xaiv txhim khu kev qha rau cov khoom tseem ceeb tshaj plaws hauv kev tsim hluav taws xob uas tsis ua haujlwm tsis yog qhov kev xaiv.

Cov yam ntxwv tseem ceeb

Siab Manganese Cov ntsiab lus:Txhim kho hardenability thiab cuam tshuam cov khoom piv rau cov carbon steels yooj yim.

Kev ntxhov siab:Tempering tshem tawm cov kev ntxhov siab sab hauv los ntawm kev ua kom txias sai ntawm cov txheej txheem quenching.

Micro-Structural Stability:Tuav nws cov khoom siv kho tshuab thaum lub sijhawm cua sov ntev ntawm kev xa ntawv -weld heat treatment (PWHT).

Brittle Fracture Prevention:Kev tsim kho tshwj xeeb kom tsis txhob ua tsis tiav tam sim hauv qhov txias - huab cua kev pabcuam.

Qib Qib

ASTM A537 Cov Lus Qhia:Tus qauv rau cua sov-kho C-Mn-Si siab hlab ntsha steel.

Chav Kawm 3:Denotes lubQuenched thiab Temperedmob tshwj xeeb optimized rau hnyav thicknesses.

Chav Kawm 1:Denotes lubLi qubmob.

Chav Kawm 2:Denotes tus qauvQuenched thiab Temperedmob.

Kev sib piv nrog EN 10028 P355QL2

Txheem Keeb Kwm:A537 Chav Kawm 3 yog Asmeskas (ASTM) tus qauv; P355QL2 yog European (EN) sib npaug.

Yield Rating:A537 Chav Kawm 3 (415MPa) muaj zog dua li tus qauv 355 MPa qhov ntsuas ntawm P355 series.

Test Protocol: A537 Class 3 testing is focused on specific thickness brackets (>2.5), whereas P355QL2 tsom rau kev cuam tshuam lub zog ntawm -60C.

Chemical Balance:P355QL2 feem ntau muaj kev txwv nruj dua ntawm sulfur thiab phosphorus dua li A537 Chav Kawm 3.

Cov ntawv thov siv

Thick -Walled Pressure Vessels:Siv nyob rau hauv siab -siab reactors thiab separators.

Nuclear fais fab kev lag luam:Cov khoom tseem ceeb hauv kev ntim khoom thiab cua txias.

Roj & Roj Refining:Heavy -cov dej distillation kab thiab cia spheres.

Offshore Engineering:Cov qauv tsim rau qhov sib sib zog nqus- dej platforms hauv huab cua txias.

Dab tsi yog qhov thickness ntau rau ASTM A537 Chav Kawm 3?
ASTM A537 Class 3 feem ntau muaj nyob rau hauv thicknesses xws li1/4 nti (6mm)rau4 nti (102mm). Cov khoom siv lub zog thiab lub zog tensile sib txawv nrog cov tuab, ua rau nws hloov tau rau ntau hom kev siv, los ntawm cov qauv sib sib zog nqus mus rau hnyav - cov khoom ua haujlwm. Rau cov phaj tuab dua 2.5 ntiv tes, lub zog tawm los yuav txo qis me ntsis, tab sis cov khoom tseem muab lub zog txaus rau kev thov.

Puas yog ASTM A537 Class 3 weldable?
Yog lawm, ASTM A537 Class 3 yogweldablesiv cov txheej txheem vuam zoo liMIG, TIG, thiabnplaum welding. Preheating thiab post-weld heat treatment (PWHT) feem ntau yuav tsum tau, tshwj xeeb tshaj yog rau cov seem tuab, kom tsis txhob tawg thiab ua kom muaj zog sib koom ua ke. Los ntawm kev siv cov kev siv vuam zoo, cov hlau no tuaj yeem siv rau hauv cov ntaub ntawv nyuaj xws licov hlab ntsha siabthiabkub exchangers, qhov twg siab zog thiab weldability tseem ceeb heev.

Lub hardness ntawm ASTM A537 Class 3 yog dab tsi?
CovBrinell hardnessASTM A537 Chav Kawm 3 feem ntau yog los ntawm200-250 HB. Qib ntawm hardness no ua kom muaj qhov sib npaug ntawm lub zog thiab lub zog, uas yog qhov tseem ceeb rau cov ntawv thov uas yuav tsum tau hnav thiab cuam tshuam. Cov khoom siv hardness pab nws tiv taus kev ua haujlwm hnyav xws liboilersthiabkub exchangers, qhov twg ob qho tib si hnav tsis kam thiab kev ua haujlwm ncaj ncees yog qhov tsim nyog.

ASTM A537 Chav Kawm 3 Chemical Composition thiab Mechanical Property

ASTM A537 Chav Kawm 3 yog dab tsi?
ASTM A537 Chav Kawm 3 yog siab - lub zog, quenched thiab tempered steel phaj siv hauv kev tsim khocov hlab ntsha siab, boilers, thiabkub exchangers. Nws mechanical zog, nrog rau siabyield zogthiabtensile zog, ua kom haum rau siab -siab, siab- qhov kub thiab txias. Cov khoom siv tshwj xeeb tsim los muab kev ntseeg siab hauv kev siv hnyav hnyav xws litshuaj nroj tsuag, tsim hluav taws xob, thiabroj refineries.

Cov ntsiab lus carbon ntawm ASTM A537 Class 3 yog dab tsi?
Covcov ntsiab lus carbonASTM A537 Chav Kawm 3 muaj nyob nruab nrab ntawm0.15% rau 0.22%. Cov ntsiab lus carbon tsawg no pab txhim khoweldability, tawv, thiabductility. Qhov sib npaug ntawm cov pa roj carbon thiab lwm yam alloying ntsiab xws limanganesethiabsiliconxyuas kom meej tias cov hlau tuaj yeem tiv taus siab - cov kev mob siab thaum tuav nws txoj kev ncaj ncees, ua rau nws haum rau cov ntawv thov tseem ceeb xws licov hlab ntsha siabthiabboilers.

Dab tsi yog qhov cuam tshuam toughness ntawm ASTM A537 Chav Kawm 3?
ASTM A537 Chav Kawm 3 muaj qhov zoo heevcuam ​​tshuam toughness, ua rau nws resistant rau tawg nyob rau hauv dynamic loads thiab thermal shock. Qhov no yog tiav los ntawm cov hlauquenching thiab temperingtxheej txheem, uas txhim kho nws lub zog thiab ductility. Cov khoom siv tshwj xeeb yog tsim los ua haujlwm siab - siab thiab siab - qhov kub thiab txias, ua rau nws tsim nyog rau kev siv tseem ceeb xws licov hlab ntsha siabthiabboilers, qhov twg cuam tshuam kuj tseem ceeb.

Lub zog tensile ntawm ASTM A537 Chav Kawm 3 yog dab tsi?
Covtensile zogASTM A537 Chav Kawm 3 feem ntau yog los ntawm70 ksi rau 90 ksi (480 MPa rau 620 MPa)rau daim hlau mus txog2.5 ntihauv thickness. Rau cov phaj tuab, lub zog tensile yuav raug txo me ntsis. Lub zog tensile no tso cai rau cov hlau tuaj yeem tiv taus cov neeg kho tshuab siab, ua rau nws zoo tagnrho rau kev siv hauv kev xav tau ib puag ncig xws litshuaj reactorsthiabcov hlab ntsha siab.

ASTM A537 Chav Kawm 3 yog dab tsi?
Yam tsawg kawg nkausyield zogASTM A537 Chav Kawm 3 yog50 ksi (345 MPa)rau daim hlau mus txog2.5 nti (64 hli). Rau cov phaj tuab dua 2.5 nti (txog li4 ntiv), lub zog tawm los txo mus rau45 ksi (310 MPa). Qhov no ua kom ntseeg tau tias cov khoom tuaj yeem tiv taus qhov kub thiab txias thaum tswj kev ua haujlwm zoo, ua rau nws tsim nyog rau cov ntawv thov tseem ceeb xws liboilersthiabkub exchangers.

ASTM A537 Class 3 puas tuaj yeem siv rau hauv sub-zero ib puag ncig?
ASTM A537 Class 3 tsis haum rau sub-zero lossis cryogenic daim ntaub ntawv. Nws qhov cuam tshuam toughness thiab lwm yam khoom siv kho tshuab tuaj yeem degrade ntawm qhov kub thiab txias, ua rau nws ua rau tsis ua hauj lwm. Rau kev siv nyob rau hauv qhov chaw txias heev, cov ntaub ntawv xws listainless hlaulos yog lwm yamcryogenic hlauyuav tsim nyog dua, raws li lawv tuav lawv cov toughness thiab lub zog ntawm qhov kub thiab txias.

Cov kev lag luam twg siv ASTM A537 Class 3?
ASTM A537 Chav Kawm 3 feem ntau yog siv hauv kev lag luam xws liroj & roj, chemical ua, tsim hluav taws xob, thiabpetrochemicals. Nws yog qhov zoo tagnrho rau cov ntawv thov uas muaj kev kub siab, kub siab, thiab corrosive ib puag ncig, xws licov hlab ntsha siab, boilers, kub exchangers, thiabtshuaj reactors. Cov kev lag luam no tso siab rau ASTM A537 Chav Kawm 3 rau nws lub zog zoo dua thiab ua haujlwm tau zoo nyob rau hauv kev ua haujlwm tsis zoo.

Hu rau tam sim no

Tag nrho cov specification thiab cov ntsiab lus muaj nyob rau ntawm kev thov. Cov ntaub ntawv saum toj no yog muab rau kev taw qhia nkaus xwb. Rau kev tsim tshwj xeeb thov hu rau peb cov neeg ua haujlwm muag khoom