Qhov sib npaug ntawm SA387 Qib 12 Chav Kawm 1 yog dab tsi?
SA387 Qib 12 Chav Kawm 1 Chromium-Molybdenum (Cr-Mo) alloy steel phaj, standardized los ntawm ASME / ASTM, tsim rau weldable siab hlab ntsha thiab boilers ua hauj lwm nyob rau hauv siab kub, muab zoo zog, toughness, thiab txhim kho corrosion vim nws cov ntsiab lus chromium, haum rau pe demanding roj thiab roj, tiam sis,
Cov hlau no tau muab faib ua cov hlau tsis tshua muaj - alloy steel vim nws cov ntsiab lus chromium thiab molybdenum siab, uas ua rau muaj txiaj ntsig zoo rau oxidation, corrosion, thiab nkag mus rau qhov kub siab thaum piv nrog cov pa roj carbon lossis cov qauv hlau.
Los ntawm kev nce qib chromium, ASTM A387 Qib 12 Chav Kawm 1 muab kev ua tau zoo tshaj plaws hauv kev ua haujlwm siab - qhov kub thiab txias qhov chaw nyob ntev - lub sij hawm lub zog thiab oxidation kuj tseem ceeb heev.
ASTM A387/A387M npog ob peb Cr-Mo qib xws li 9Cr-1Mo, 11Cr-1Mo, thiab lwm yam alloys, txhua yam tsim tshwj xeeb rau kev tuav cov ntawv thov. Ntawm lawv, ASTM A387 Qib 12 Chav Kawm 1 yog dav siv rau nws cov khoom sib npaug, weldability, thiab thermal stability.
Kev kho cua sov
Kev Kho Mob Kub Kub Kub: 1225℃- 1425 degree
Cov khoom siv raug: Normalized thiab Tempered (N + T) lossis quenched thiab Tempered (Q + T) nyob ntawm qhov kev qhia tshwj xeeb thiab kev pabcuam.
Chemical Composition ntawm ASTM A387 Qib 12 Chav Kawm 1
| Element | Cov ntsiab lus |
|---|---|
| Cov pa roj carbon (C) | 0.05 – 0.17 |
| Silicon (Si) | 0.15 – 0.40 |
| Manganese (Mn) | 0.40 – 0.65 |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.035 |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.035 |
| Chromium (Cr) | 0.80 – 1.15 |
| Molybdenum (hli) | 0.45 – 0.60 |
Mechanical Properties
ASTM A387 Qib 12 Chav Kawm 1 (Raws li cua sov-kho)
| Khoom | Tus nqi |
|---|---|
| Yield zog Rp0.2 (MPa) | Ntau dua lossis sib npaug rau 327 |
| Tensile zog Rm (MPa) | Ntau dua lossis sib npaug li 227 |
| Impact Zog KV / Ku (J) | Ntau dua lossis sib npaug 23 |
| Elongation A (%) | Ntau dua lossis sib npaug li 42 |
| Kev txo qis ntawm Cheeb Tsam Z (%) | Ntau dua lossis sib npaug li 34 |
| Kev kho cua sov | Kev daws & Kev laus, Annealing, Ausaging, Q + T |
| Brinell Hardness (HBW) | Tsawg dua lossis sib npaug li 411 |
Lub cev muaj zog ntawm ASTM A387 Qib 12 Chav Kawm 1
ASTM A387 Qib 12 Chav Kawm 1 steel muaj lub zog siab, ua haujlwm ntev, zoo ductility, thiab muaj zog corrosion kuj. Steel muaj ib qho ntawm lub zog zoo tshaj plaws - rau - qhov hnyav piv ntawm cov khoom siv engineering, ua rau nws zoo tagnrho rau cov khoom hnyav - cov khoom siv siab.
Yam Khoom Lub cev
| Kub (degree) | Modulus ntawm Elasticity (GPa) | Lub ntsiab lus Thermal Expansion (× 10⁻⁶ / degree) | Thermal conductivity (W / m· degree) | Cov cua kub tshwj xeeb (J / kg· degree) | Kev tiv thaiv hluav taws xob (Ω·mm² / m) | Qhov ceev (kg / dm³) | Poisson tus ratio |
|---|---|---|---|---|---|---|---|
| 33 | – | – | – | – | 0.12 | – | – |
| 314 | 982 | – | 13.3 | 214 | – | – | – |
| 538 | – | 33 | 14.2 | – | – | – | – |
ASTM A387 / A387M Lwm cov qib lossis qib zoo sib xws
| Qib | Txuj | Thaj tsam | Cov ntsiab lus |
|---|---|---|---|
| A387 Qib 22 Chav Kawm 2 | ASTM A387 / A387M ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / A387M / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / A387M / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387) thiab ASTM A387 | Asmeskas | Siab lub nkoj phaj, hlau alloy, chrome molybdenum |
| A387 K31545 | ASTM A387 / A387M ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / A387M / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / A387M / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387) thiab ASTM A387 | Asmeskas | Siab lub nkoj phaj, hlau alloy, chrome molybdenum |
| A387 Qib 11 Chav Kawm 1 | ASTM A387 / A387M ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / A387M / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / A387M / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387) thiab ASTM A387 | Asmeskas | Siab lub nkoj phaj, hlau alloy, chrome molybdenum |
| A387 K11789 | ASTM A387 / A387M ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / A387M / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / A387M / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387) thiab ASTM A387 | Asmeskas | Siab lub nkoj phaj, hlau alloy, chrome molybdenum |
| A387 Qib 21L Chav Kawm 1 | ASTM A387 / A387M ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / A387M / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / A387M / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387) thiab ASTM A387 | Asmeskas | Siab lub nkoj phaj, hlau alloy, chrome molybdenum |
| A387 Qib 22 Chav Kawm 1 | ASTM A387 / A387M ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / A387M / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387 / A387M / ASTM A387 / ASTM A387 / ASTM A387 / ASTM A387) thiab ASTM A387 | Asmeskas | Siab lub nkoj phaj, hlau alloy, chrome molybdenum |
SA387 Qib 12 Chav Kawm 1 yog dab tsi?
SA387 Qib 12 Chav Kawm 1 yog chromium-molybdenum alloy steel phaj specification, ib feem ntawm ASME Boiler thiab Pressure Vessel Code, tsim los rau kev pabcuam hauv welded siab hlab ntsha ua haujlwm ntawm nruab nrab mus rau qhov kub thiab txias.
Cov tshuaj muaj pes tsawg leeg ntawm SA387 Gr 12 Cl 1 yog dab tsi?
Nws muaj pes tsawg leeg muaj xws li Chromium (0.80-1.25%) thiab Molybdenum (0.44-0.65%), nrog rau kev tswj cov nqi ntawm Carbon, Manganese, Silicon, Phosphorus, thiab Sulfur.
Dab tsi yog cov yam ntxwv ntawm SA387 Qib 12 Chav Kawm 1?
Cov khoom tseem ceeb muaj xws li lub zog tensile yam tsawg kawg nkaus ntawm 415 MPa (60 ksi) thiab qhov tsawg kawg nkaus yield zog ntawm 220 MPa (32 ksi), nrog rau elongation yuav tsum tau sib txawv ntawm phaj thickness.
Puas yog SA387 Qib 12 Chav Kawm 1 sib npaug rau ASTM A387 Gr12?
Qhov tseem ceeb, yog. SA387 yog ASME tsim, uas feem ntau zoo ib yam rau ASTM A387 Gr12 specification. Lub "SA" ua ntej qhia nws qhov kev saws los ntawm ASME rau kev tsim qauv.
Qhov txawv ntawm Chav Kawm 1 thiab Chav Kawm 2 rau SA387 Qib 12 yog dab tsi?
Qhov sib txawv tseem ceeb yog qhov yuav tsum tau kho cua sov rau Chav Kawm 2. SA387 Qib 12 Chav Kawm 2 yuav tsum tau muab rau hauv cov xwm txheej zoo li qub thiab tempered, thaum Chav Kawm 1 tuaj yeem muab tau raws li -rolled, annealed, los yog normalized thiab tempered.
Dab tsi yog qhov ntsuas kub rau SA387 Qib 12 steel?
Nws yog qhov tsim nyog rau kev pabcuam kub txog li 800℃F (427 degree), ua rau nws muaj kev xaiv rau kev pabcuam hydrogen thiab lwm yam kev siv kub siab hauv refineries.
Yuav ua li cas koj weld SA387 Qib 12 Chav Kawm 1 phaj?
Vuam xav tau cov txheej txheem kom raug, suav nrog preheating (feem ntau 250-400℃F / 121-}204 degree) thiab tom qab vuam kub kho (PWHT) rau feem ntau daim ntawv thov. Cov hlau muab tub lim muaj xws li E8016-B2 lossis ER80S-B2.
SA387 Qib 12 Chav Kawm 1 feem ntau siv nyob qhov twg?
Nws yog dav siv nyob rau hauv fabrication ntawm siab hlab ntsha, reactors, thiab tshav kub exchangers rau cov roj & roj, petrochemical, thiab fais fab kev lag luam.
Puas yog SA387 Qib 12 Chav Kawm 1 yog lub zog creep txhim kho ferritic (CSEF) steel?
Tsis yog, tsis yog. SA387 Gr12 yog ib txwm 1Cr-0.5Mo alloy. CSEF steels zoo li Qib 91, 92, thiab 122 muaj qhov sib txawv thiab muaj zog kub ntau dua.
Lub hardness ntawm SA387 Qib 12 Chav Kawm 1 yog dab tsi?
Hardness tsis meej meej nyob rau hauv tus qauv, tab sis nws yog tswj los ntawm chemistry thiab mechanical zog. Hauv kev pabcuam, qhov nyuaj yog feem ntau txwv rau qhov siab tshaj plaws (piv txwv li, 200 HB Brinell) los tiv thaiv hydrogen-induced cracking (HIC) lossis sulfide stress cracking (SSC).
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.
