ASTM A204 Qib B piv rau ASTM A204 Qib C li cas?

ASTM A204 Qib B piv rau ASTM A204 Qib C li cas?

ASTM A204 Qib Cmuaj zog dua thiab load- bearing peev piv rauA204 Qib BLub zog tensile ntawm 75-95 ksi (515--655 MPa)70-90 ksi (485-620 MPa). Qib C muab kev ua tau zoo dua hauv siab - kev ntxhov siab, siab - siab, lossis siab - qhov chaw kub, thaum ob qho tib si yog molybdenum- alloyed steels siv feem ntau hauv welded siab hlab ntsha thiab boilers.

ASTM A204 Qib B yog molybdenum- alloyed steel phaj uas ua haujlwm siab -kub ua haujlwm rau lub ntiaj teb lub zog. Los ntawm kev ntxiv molybdenum, cov hlau yuav muaj peev xwm tiv taus qhov qeeb, lub sij hawm- nyob ntawm deformation hu ua creep, uas yog qhov ua rau tsis ua hauj lwm nyob rau hauv siab - siab chav tshuab. Qib B muab cov khoom siv hluav taws xob muaj zog nrog lub zog tensile yam tsawg kawg nkaus ntawm 485 MPa. Nws yog cov khoom ntawm kev xaiv rau cov neeg tsim qauv nrhiav kev txhim khu kev qha, code-raws li steel rau hnyav- cov hlab ntsha phab ntsa uas yuav tsum muaj kev nyab xeeb rau ntau xyoo nyob rau hauv tas li thermal thiab mechanical stress.

Cov yam ntxwv tseem ceeb

Thermal Endurance:Engineered rau lub neej tsim ntawm 20+ xyoo nyob rau hauv siab - qhov kub thiab txias.

Tsawg Phosphorus thiab Sulfur:Cov txheej txheem tsim khoom niaj hnub ua kom tsis muaj qhov tsis zoo, uas ua kom cov vuam zoo thiab kub -ductility.

Cov lus teb tsis tu ncua rau PWHT:Cov cuab yeej cuab tam tseem nyob hauv qhov tshwj xeeb txawm tias tom qab ntau qhov Kev Tshaj Tawm - Weld Thaum tshav kub kub kho cycles.

Toughness thoob plaws qhov kub thiab txias:Khaws nws qhov kev cuam tshuam los ntawm chav tsev kub mus txog nws qhov kev pabcuam siab tshaj plaws.

Yooj yim ntawm kev soj ntsuam:Cov khoom siv tau zoo heev nrog Ultrasonic Testing (UT) thiab Radiographic Testing (RT) kom ntseeg tau tias muaj kev ncaj ncees.

Qib Qib

ASTM:American Society for Testing and Materials.

A:Prefix rau Ferrous (hlau{0}}raws li) cov ntaub ntawv.

204:Cov txheej txheem tshwj xeeb rau Molybdenum Alloy Steel siab nkoj daim hlau.

Qib B:Qhov nruab nrab -ntau tensile lub zog tier (70–90 ksi) nyob rau hauv cov lus qhia no.

Kev sib piv (vs. ASTM A202 Qib B)

Alloying Agent:A204 gr. B tso siab rauMolybdenumrau kub tsis kam; A202 gr. B yog aCr-Mn-Sialloy tsom rau siab ambient zog.

Hom Kev Ua Haujlwm Tseem Ceeb:A204 yog tsim los tiv thaivnkag; A202 tau tsim los rau siab duapib siabntawm qhov kub thiab txias.

Niaj hnub nimno Status:A204 yog tam sim no, dav siv specification; A202 feem ntau yog cov khoom qub qub hloov los ntawm cov hlau tshiab.

Siab -Tsub stability:A204 tuav nws cov khoom zoo dua ntawm qhov kub siab tshaj 400℃vim qhov ruaj khov molybdenum carbides.

Daim Ntawv Thov Kev Sib Tham

Sulfur Recovery Units:Reactors siv nyob rau hauv refineries los rho sulfur los ntawm cov txheej txheem gases ntawm qhov kub thiab txias.

Chav Headers:Loj - txoj kab uas hla cov kav dej uas ua raws li lub hauv paus xa khoom hubs rau siab - lub tshuab hluav taws xob siab.

Hydrotreater Plhaub:Cov nkoj siv los tshem tawm impurities los ntawm cov roj feem ntawm qhov kub thiab txias.

Pov tseg-rau-Energy Boilers:Chav generators uas siv cua sov los ntawm kev hlawv cov khib nyiab hauv nroog.

High -Tsem Expansion Tanks:Cov hlab ntsha siab uas haum rau kev nthuav dav ntawm cov kua dej kub hauv kev kaw - lub voj voog.

Lub zog tensile ntawm ASTM A204 Qib B steel yog dab tsi?
Lub zog tensile ntawm ASTM A204 Qib B yog li ntawm 415 txog 550 MPa (60 txog 80 ksi). Qhov ntau yam no tso cai rau cov khoom siv los tiv thaiv deformation thiab tswj nws cov qauv kev ntseeg siab nyob rau hauv kev ntxhov siab, ua rau nws zoo tagnrho rau cov hlab ntsha siab thiab siab - cov tshuab siab. Nws lub zog, ua ke nrog nws zoo heev - qhov kub thiab txias kev ua tau zoo, ua kom cov hlau tuaj yeem ua rau muaj kev kub ntxhov hauv ib puag ncig yam tsis muaj kev cuam tshuam nws qhov kev ua tau zoo.

ASTM A204 Qib B siv rau dab tsi?
ASTM A204 Qib B feem ntau yog siv rau hauv kev tsim cov hlab ntsha, cov khoom siv hluav taws xob, thiab cov boilers. Cov hlau yog tsim rau cov ntawv thov uas muaj qhov kub siab, xws li hauv cov roj thiab roj, lub zog tsim hluav taws xob, thiab kev lag luam tshuaj lom neeg. Nws yog siv nyob rau hauv ib puag ncig uas cov khoom xav tau los tswj nws lub zog nyob rau hauv siab thaum tiv thaiv corrosion thiab oxidation ntawm qhov kub thiab txias.

Dab tsi yog qhov muaj pes tsawg leeg ntawm ASTM A204 Qib B steel?
ASTM A204 Qib B steel muaj carbon (0.15-0.25%), manganese (0.60-0.90%), silicon (0.15-0.40%), phosphorus (0.035% max), sulfur (0.035% max), thiab molybdenum (0.25%). Cov ntsiab lus molybdenum yog qhov tseem ceeb hauv kev txhim kho cov khoom tiv thaiv rau qhov kub thiab txias thiab txhim kho nws lub zog ntawm qhov kub siab. Kev tswj hwm qhov sib npaug ntawm cov khoom no muab

Carbon sib npaug: Ceq=【C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15】%

1. ASTM A204 Qib B steel yog dab tsi?
ASTM A204 Qib B yog qis- alloy hlau uas muaj molybdenum (0.25–0.60%) raws li nws cov ntsiab lus alloying. Nws yog siv nyob rau hauv kev tsim cov hlab ntsha siab thiab boilers, qhov twg siab zog thiab tsis kam mus rau tshav kub yuav tsum tau. Cov ntsiab lus molybdenum hauv A204 Qib B pab ua kom cov hlau muaj peev xwm tiv taus qhov kub thiab txias thiab txhim kho nws tag nrho lub zog thiab corrosion kuj nyob rau hauv ib puag ncig kev lag luam.

2. Lub zog ntawm ASTM A204 Qib B steel yog dab tsi?
Lub zog ntawm ASTM A204 Qib B steel yog tsawg kawg yog 205 MPa (30 ksi). Cov cuab yeej no tso cai rau cov khoom siv los tiv thaiv kev ntxhov siab yam tsis muaj kev hloov pauv mus tas li, ua rau nws zoo tagnrho rau cov hlab ntsha siab thiab lwm yam kev siv siab -. Lub zog tawm los yog qhov tseem ceeb hauv kev ua kom ntseeg tau tias cov hlau tuaj yeem tiv taus ob qho tib si zoo li qub thiab dynamic loads yam tsis muaj kev poob lossis poob nws cov duab hauv kev ua haujlwm.

3. Qhov muaj pes tsawg leeg ntawm ASTM A204 Qib B steel yog dab tsi?
ASTM A204 Qib B steel muaj carbon (0.15-}0.25%), manganese (0.60-0.90%), silicon (0.15-0.40%), phosphorus (0.035% max), sulfur (0.035% max), thiab molybdenum (0.6%). Cov ntsiab lus molybdenum yog qhov tseem ceeb hauv kev txhim kho cov khoom tiv thaiv rau qhov kub thiab txias thiab txhim kho nws lub zog ntawm qhov kub siab. Kev tswj qhov sib npaug ntawm cov ntsiab lus no muab cov hlau zoo toughness, weldability, thiab high-temperature kev ua tau zoo.

4. Cov khoom siv tshuaj lom neeg ntawm ASTM A204 Qib B yog dab tsi?
ASTM A204 Qib B steel muaj qhov sib xyaw ntawm carbon, manganese, phosphorus, sulfur, thiab silicon. Cov hlau alloying molybdenum (0.25-0.60%) yog qhov tseem ceeb rau kev txhim kho nws cov kev tiv thaiv rau siab - qhov kub thiab txias, ua rau nws haum rau siv nyob rau hauv cov cua kub exchangers, siab hlab ntsha, thiab boilers. Cov hlau muaj pes tsawg leeg muab zoo weldability thiab nruab nrab tensile lub zog, ua rau nws zoo tagnrho rau kev siv qhov twg kub thiab siab yog yam tseem ceeb.

5. Dab tsi yog qhov weldability ntawm ASTM A204 Qib B steel?
ASTM A204 Qib B muaj qhov zoo weldability, ua rau nws tsim nyog rau kev siv vuam hauv cov hlab ntsha thiab cov khoom siv. Standard vuam txoj kev xws li shielded hlau arc vuam (SMAW), roj tungsten arc vuam (GTAW), thiab submerged arc vuam (SAW) yuav siv tau. Preheating ua ntej welding thiab post-weld heat treatment (PWHT) tej zaum yuav tsim nyog los txo qhov kev pheej hmoo ntawm kev tawg thiab ua kom lub zog thiab kev ncaj ncees ntawm cov welded sib koom.

6. Dab tsi yog qhov kub siab tshaj plaws ASTM A204 Qib B tuaj yeem tiv taus?
ASTM A204 Qib B tuaj yeem tiv taus qhov kub txog li 500℃(932℃F), ua rau nws haum rau siab -kub siv xws li hauv cov hlab ntsha siab, cov khoom siv hluav taws xob, thiab cov boilers. Cov ntsiab lus molybdenum pab txhim kho cov khoom siv lub zog thiab tiv thaiv oxidation, tso cai rau nws tswj nws txoj kev ncaj ncees nyob rau hauv ib puag ncig uas lwm cov hlau yuav ua tsis tau vim kub dhau.

7. Txoj kev kho cua sov rau ASTM A204 Qib B yog dab tsi?
Cov txheej txheem kev kho cua sov rau ASTM A204 Qib B feem ntau cuam tshuam nrog kev ua haujlwm zoo lossis kev ntxhov siab-txo cov txheej txheem, uas pab kho cov qauv nplej thiab txhim kho cov khoom muaj zog thiab tawv. Nws yog tom qab ntawd txias ntawm tus nqi tswj kom tsis txhob tawg lossis distortion. Post-weld heat treatment (PWHT) feem ntau yog siv tom qab vuam los txo cov kev ntxhov siab uas seem thiab txhim kho cov khoom siv tshuab, kom ntseeg tau tias kev ua tau zoo nyob rau hauv siab - kub thiab siab - siab.

Hu rau tam sim no

Yog tias koj xav paub ntau ntxiv txog ASTM A204 Qib B GNEE cov khoom, koj tuaj yeem xa email rau toinfo@gneesteels.com . Peb zoo siab tshaj los pab koj.