Dab tsi yuav tsum tau ceev faj thaum vuam ASTM A387 Qib 11 Chav Kawm 2?

Dab tsi yuav tsum tau ceev faj thaum vuam ASTM A387 Qib 11 Chav Kawm 2?

Thaum vuamASTM A387 Qib 11 Chav Kawm 2(a 1.25Cr-0.5Mo alloy), kev ceev faj tseem ceeb suav nrogKev tu kom huv, yuav tsum tau ua kom sov ua ntej (nyob ib puag ncig 149℃/ 300℃F), siv qis -hydrogen electrodes (zoo li E8018-B2), tswj qhov kub thiab txias, thiab siv Kev Kho Mob Tom Qab Kub Kub (PWHT) (ib ncig 690℃/ 1275℃F)tiv thaiv kev tawgvim nws nyiam tsim cov martensite brittle, yuav tsum tau ua raws li ASME / AWS cov lej rau cov kev txwv tshwj xeeb.

ASTM A387 Qib 11 Chav Kawm 2 yog chromium-molybdenum alloy steel phaj rau siab-kub siab cov hlab ntsha, featuring ~ 1.25% Chromium (Cr) thiab ~ 0.5% Molybdenum (Mo) rau oxidation / corrosion kuj, nrog rau chav kawm 2 qhia txog kev siv hluav taws xob ntau dua, ua kom muaj zog thiab ua kom muaj zog, tsim nyog rau kev siv roj thiab kev ua haujlwm siab. kev lag luam. Nws muaj cov khoom siv zoo tshaj plaws, suav nrog cov tensile siab dua (75-100 ksi) thiab lub zog tawm los (min 43 ksi) dua li Chav Kawm 1, nrog rau cov kev cuam tshuam tshwj xeeb thiab kev kho cua sov.

Cov yam ntxwv tseem ceeb

Kev sib xyaw:~ 1.25% Chromium, ~ 0.5% Molybdenum.

Kev kho cua sov:Normalized thiab Tempered (tsawg tempering kub ~ 620 degree).

Khoom (Class 2):Lub zog siab dua li chav kawm 1 vim kev kho mob.

Tensile zog: 75-100 ksi (515-690 MPa).

Yield zog: Min 43 ksi (310 MPa).

Impact Tested: Feem ntau mus rau -52 degree.

Chav Kawm 1 vs. Chav Kawm 2

Chav Kawm 1:Tsawg zog xav tau.

Chav Kawm 2:Siab

Daim ntawv thov:Welded boilers, siab hlab ntsha, tshav kub exchangers nyob rau hauv siab kub kev pab cuam.

Kev lag luam:Petrochemical, Roj & Roj, Kev Tsim Hluav Taws Xob.

Dab tsi yog qhov txawv ntawm ASTM A387 Qib 11 Chav Kawm 2 thiab ASTM A387 Qib 11 Chav Kawm 1?

ASTM A387 Qib 11 Chav Kawm 2 yog qhov muaj zog, tawv dua ntawm Qib 11 Chav Kawm 1, feem ntau txawv ntawm cov khoom siv kho tshuab (siab dua tensile/yield zog) vim muaj peev xwm sib txawv ntawm kev kho cua sov, ua rau Chav Kawm 2 haum rau kev xav tau siab dua - kub / siab siv dua li Chav Kawm 1, thaum ob qho tib si sib npaug rau 25% Cr.-1.

Puas yog ASTM A387 Qib 11 Chav Kawm 2 kev kub ceev hlau?

Tsis yog, ASTM A387 Qib 11 Chav Kawm 2 yogtsis yogsiab- steel ceev (HSS); nws yog achromium-molybdenum (Cr-Mo) alloy siab hlab ntsha hlautsim los rau siab -kub lub zog, creep resistance, thiab corrosion kuj, feem ntau yog siv nyob rau hauv boilers thiab petrochemical khoom, whereas siab - ceev steels yog cov cuab yeej steels nrog siab tungsten / molybdenum cov ntsiab lus rau cov cuab yeej txiav. Qib 11 Chav Kawm 2 muaj cov cuab yeej kho kom zoo dua qub xws li lub zog tawm los ntau dua li Chav Kawm 1 vim yog kev kho cua sov ntxiv (normalized thiab tempered) rau qhov xav tau kev pabcuam kub siab.

Puas yog ASTM A387 Qib 11 Chav Kawm 2 carbon steel?

Tsis yog, ASTM A387 Qib 11 Chav Kawm 2 tsis yog carbon hlau; nws yog chromium-molybdenum (Cr-Mo) alloy steel, tshwj xeeb yog tsim los rau siab -kub siab cov hlab ntsha, nrog ntxiv chromium (kwv yees li 1-1.5%) thiab molybdenum (ib puag ncig 0.5%) rau kev txhim kho lub zog, corrosion resistance, thiab creep resistance, distinguishing nws los ntawm yooj yim carbon steel. Qhov kev xaiv "Class 2" qhia tau hais tias muaj zog dua qhov yuav tsum tau ua tiav los ntawm kev kho cua sov tshwj xeeb (normalized thiab tempered) piv rau Chav Kawm 1.

Sib npaug

ASTM A387 GR 11 CLASS 2 Phaj Specification

ASTM A387 / SA387 GR 11 CLASS 2 Mechanical Properties

1. Lub hardness ntawm ASTM A387 Qib 11 Chav Kawm 2 yog dab tsi?

ASTM A387 Qib 11 Chav Kawm 2 steel qhov nyuaj tsis yog ib tus lej tas li tab sis nws txawv nrog tempering, txawm hais tias nws feem ntau muaj Brinell hardness ntawm ib ncig ntawm 170-207 HBW (los yog kwv yees li 190 HBW raws li ib qho piv txwv), qhia txog nws lub zog siab dua Chav Kawm 2, nrog rau qhov tsawg kawg nkaus tensile zog 5-10-9 feem ntau nyob ib puag ncig. ksi) tom qab kev kho cua sov rau cov hlab ntsha siab.

2. Dab tsi yuav tsum tau ceev faj thaum vuam ASTM A387 Qib 11 Chav Kawm 2?

Thaum vuam ASTM A387 Qib 11 Chav Kawm 2 (a 1.25Cr-}0.5Mo alloy), kev ceev faj tseem ceeb suav nrog kev tu kom huv, yuav tsum tau ua kom sov (kwv yees 149℃/ 300℃F), siv qis- hydrogen electrodes (xws li E8018-B2), thiab tswj kev sib cuam tshuam ntawm H-Posts (nyob ib ncig ntawm 690℃/ 1275℃F) txhawm rau tiv thaiv kev tawg vim nws nyiam tsim cov martensite nkig, yuav tsum tau ua raws li ASME / AWS cov lej rau cov kev txwv tshwj xeeb.

3. ASTM A387 Qib 11 Chav Kawm 2 sib npaug li cas?

ASTM A387 Qib 11 Chav Kawm 2 yog sib npaug rau ASME SA387 Qib 11 Chav Kawm 2 (ASME boiler thiab siab hlab ntsha code version) thiab muaj cov khoom sib txawv thoob ntiaj teb xws li EN 10028 13CrMoSi5-5 thiab British Standard BS 621B, tag nrho cov khoom zoo sib xws 1.20% Modenly steel alloy. tensile zog zog rau high-temperature siab siv.

4. Dab tsi vuam pas nrig rau ASTM A387 Qib 11 Chav Kawm 2?

Rau ASTM A387 Qib 11 Chav Kawm 2 (a 1.25Cr-0.5Mo alloy), siv qis-carbon chromium-molybdenum electrodes xws li E7018-B2L (SMAW/Stick), E8018{{21}18}B2 los yog E28 P22), ER80S-B2 los yog ER90S-B3 (TIG/MIG), los yog tsim nyog flux-cored xaiv xws li E9XT1-B3C, kom ntseeg tau tias txuam chemistry, zoo preheat (kwv yees li 150-200 degree), thiab tom qab vuam cua sov kev kho mob (PWHT)-kub siab.

5. ASTM A387 Qib 11 Chav Kawm 2 yog dab tsi?

ASTM A387 Qib 11 Chav Kawm 2 yog chromium-molybdenum (Cr-Mo) alloy steel phaj rau siab-kub siab cov hlab ntsha, muab lub zog siab dua li Chav Kawm 1 vim kev kho cua sov nruj dua, nrog ib ncig ntawm 1.25% chromium thiab 0.5% molybdenum}} siv zog ua haujlwm, siab heev thiab {-} oxidation creep, siab zog roj, roj, thiab tshuaj industries. Nws yog lub npe hu rau cov ntawv thov xws li reactors thiab cov khoom siv hluav taws xob sib txawv uas xav tau qhov kub thiab txias.

6. Dab tsi yog daim ntawv thov ntawm ASTM A387 Qib 11 Chav Kawm 2?

ASTM A387 Qib 11 Chav Kawm 2 steel feem ntau yog siv rau kev ua haujlwm siab kub hauv cov hlab ntsha siab, boilers, thiab cov khoom siv hluav taws xob, tshwj xeeb tshaj yog nyob rau hauv cov roj, roj, petrochemical, thiab hluav taws xob tsim kev lag luam vim nws lub zog zoo heev, weldability, thiab tiv thaiv corrosion thiab oxidation ntawm qhov kub thiab txias. Cov ntawv thov tseem ceeb suav nrog hydrogenation reactors, hydrocracking units, steam headers, thiab cia tso tsheb hlau luam hauv qhov xav tau ib puag ncig.

7. Tus lej P ntawm ASTM A387 Qib 11 Chav Kawm 2 yog dab tsi?

P- Tus lej rau ASTM A387 Qib 11 Chav Kawm 2 alloy hlau, siv rau hauv cov hlab ntsha siab, yog P-Number 4, uas xaiv cov hlau tsis tshua muaj hlau (Cr-Mo) uas poob rau hauv cov kev sib xyaw tshwj xeeb rau kev faib pawg vuam. Cov khoom no yog tus cwj pwm los ntawm nws cov 1.25% Chromium thiab 0.5% Molybdenum cov ntsiab lus, txawv ntawm lwm cov qib los ntawm nws cov khoom siv tshuab (Class 2 muaj zog dua li Chav Kawm 1) tab sis sib koom tib lub hauv paus chemistry.

Hu rau tam sim no

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