SA 387 Gr.11 Cl.1yog ASME / ASTM chromium-molybdenum alloy steel phaj tsim rau welded boilers thiab siab hlab ntsha nyob rau hauv siab kub kev pab cuam, featuring nruab nrab lub zog los ntawm ib tug normalized tshav kub kho (Class 1) thiab ib tug muaj pes tsawg leeg ntawm roughly 1.25% Chromium thiab 0.5% Molybdenum, zoo tagnrho rau cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob zoo, petroductility thiab cov khoom siv hluav taws xob zoo.
Sib npaug
| BS | EN | ASTM/ASME | DIN |
| 621 B | ––– | SA387-11-1 | ––– |
Specifications rau ASME SA387 Qib 11 Alloy Steel Phaj
| Lub npe | Nominal Chromium Cov ntsiab lus (%) |
Nominal Molybdenum Cov ntsiab lus (%) |
| SA387 Qib 11 | 1.25% | 0.50% |
Tensile Requirements rau ASME SA387 Qib 11 Alloy Steel Phaj Chav Kawm 1 Phaj
| Lub npe: | Yuav tsum tau: | Qib 11 |
| SA387 Qib 11 | Tensile zog, ksi [MPa] | 75 txog 100 [515 rau 690] |
| Yield zog, min, ksi [MPa] / (0.2% offset) | 43 [310] | |
| Elongation hauv 8 nti. [200mm], min % | 18 | |
| Elongation hauv 2 nti. [50mm], min, % | 22 | |
| Txo thaj tsam, min% | ––– |
Cov Khoom Siv Tshuaj Rau ASME SA387 Qib 11 Alloy Steel Phaj
| Element | Chemical Composition (%) | |
| SA387 Qib 11 | ||
| Cov pa roj carbon: | Kev Ntsuas Kub: | 0.05 - 0.17 |
| Product Analysis: | 0.04 - 0.17 | |
| Manganese: | Kev Ntsuas Kub: | 0.40 - 0.65 |
| Product Analysis: | 0.35 - 0.73 | |
| Phosphorus: | Kev Ntsuas Kub: | 0.035 |
| Product Analysis: | 0.035 | |
| Sulfur (max): | Kev Ntsuas Kub: | 0.035 |
| Product Analysis: | 0.035 | |
| Silicon: | Kev Ntsuas Kub: | 0.50 - 0.80 |
| Product Analysis: | 0.44 - 0.86 | |
| Chromium: | Kev Ntsuas Kub: | 1.00 - 1.50 |
| Product Analysis: | 0.94 - 1.56 | |
| Molybdenum: | Kev Ntsuas Kub: | 0.45 - 0.65 |
| Product Analysis: | 0.45 - 0.70 |
Cov txheej txheem tseem ceeb:
Cov khoom siv yog chromium-molybdenum alloy steel phaj raws li ASME SA-387, tsim los rau kev kub siab thiab kev pabcuam siab. Nws cov txheej txheem alloying feem ntau yog chromium thiab molybdenum, tsim cov microstructure ruaj khov ntawm qhov kub siab, ua kom lub zog zoo thiab nkag siab tsis kam.
Qib Txhais Lus:
SA qhia txog kev ua raws li ASTM / ASME cov qauv; 387 yog tus qauv tooj rau hom Cr-Mo steel; Gr.11 txhais tau hais tias cov khoom muaj kwv yees li 1.25% chromium thiab 0.5% molybdenum, nrog rau cov tshuaj muaj pes tsawg leeg nruj raws li tus qauv yuav tsum tau ua; Cl.1 (Class 1) qhia txog thawj theem ntawm cov khoom siv kho tshuab thiab kev kho cua sov, feem ntau normalizing ua raws li
tempering, kom ua tau zoo toughness thiab high-temperature stability.
Kev tsim khoom:
Steelmaking feem ntau yog siv cov pa hluav taws xob yooj yim lossis hluav taws xob arc rauv, nrog kev tswj hwm nruj ntawm leej faj
thiab phosphorus los txhim kho purity. Tswj dov kom zoo ib yam thickness thiab refines lub
microstructure. Kev kho cua sov yog cov kauj ruam tseem ceeb: normalizing homogenizes tus qauv, thiab
tempering txo hardness thaum txhim kho toughness, yog li kom ntseeg tau tias kev ua haujlwm ntev
ntawm qhov kub thiab txias. Kev tshuaj xyuas suav nrog kev kuaj ultrasonic (UT) thiab kev ntsuas nkag mus (PT) rau
txheeb xyuas qhov tsis xws luag sab hauv thiab saum npoo.
Cov ntawv thov tseem ceeb
Roj & Roj:
SA-387 Gr.11 steel yog dav siv nyob rau hauv cov khoom siv rau kev ua, thauj, thiab khaws cia roj thiab roj, tshwj xeeb tshaj yog nyob rau hauv high-temperature thiab high-pressure tej yam kev mob. Nws yog qhov tshwj xeeb tshaj yog haum rau cov kev pabcuam qaub uas muaj hydrogen sulfide (H₂S), qhov uas tsis kam tiv thaiv sulfide kev nyuaj siab tawg thiab nkag yog qhov tseem ceeb. Cov khoom no feem ntau pom muaj nyob rau hauv cov kab refinery, separators, thiab cov hlab ntsha siab.
Petrochemical cog:
Hauv cov chaw petrochemical, SA-387 Gr.11 yog siv rau cov reactors, distillation towers, heat exchangers, thiab tseem ceeb piping systems uas ua hauj lwm ntawm siab kub. Nws muaj peev xwm tswj tau lub zog thiab tawv nyob rau hauv lub sij hawm thermal kev nyuab siab ua rau nws zoo tagnrho rau cov txheej txheem xws li tawg, hloov kho, thiab hydroprocessing.
Kev tsim hluav taws xob:
Cov khoom siv dav siv hauv thermal fais fab nroj tsuag rau boilers, superheaters, headers, thiab tshav kub exchangers. Nws zoo heev kub-kub lub zog thiab creep tsis kam ua kom ntseeg tau tias kev ua tau zoo hauv chav tshuab ua haujlwm ntawm kev kub ntxhov thiab kub.
Cov nroj tsuag tshuaj:
SA-387 Gr.11 yog siv nyob rau hauv ntau yam khoom siv tshuaj, nrog rau cov reactors, cia tso tsheb hlau luam, thiab hloov cov kab, qhov twg yuav tsum tau tiv thaiv kub kub thiab corrosive media. Nws cov chromium-molybdenum muaj pes tsawg leeg muab kev ruaj ntseg zoo thiab ua haujlwm ntev hauv cov tshuaj lom neeg nruj heev.
Tau txais cov lus muaj nuj nqis rau SA 387 Gr.11 Cl.1, Hu rau GNEE Steel.
Dab tsi yog qhov tseem ceeb ntawm cov khoom siv kho tshuab SA387 GR 11 CLASS 1 muaj tom qab kev kho cua sov?
Nws muaj qhov zoo heev - kub lub zog, toughness, creep resistance, thiab zoo weldability, nrog txo cov kev ntxhov siab.
Cov txheej txheem kho cua sov twg yog siv rau SA387 GR 11 CLASS 1?
Normalizing + Tempering lossis quenching + Tempering, txhawm rau txhim kho microstructure thiab txhim kho kev ua haujlwm zoo.
Dab tsi yog qhov ntsuas kub tseem ceeb rau normalizing SA387 GR 11 CLASS 1?
Nws yog feem ntau rhuab saum qhov kub tseem ceeb (ib ncig 890-920 degree) ua ntej cua txias.
Tus qauv twg tswj hwm kev tsim khoom thiab tshuaj xyuas ntawm SA387 GR 11 CLASS 1?
Nws ua raws li ASME SA-387 tus qauv, ib qho kev qhia tshwj xeeb rau cov phaj siab siab rau cov kev pabcuam kub.
Dab tsi yog thawj daim ntawv thov ntawm SA387 GR 11 CLASS 1?
Nws yog tsuas yog siv los tsim cov khoom ntawm siab - kub thiab siab - cov khoom siv siab, xws li boilers thiab cov hlab ntsha siab.
Puas yog SA387 GR 11 CLASS 1 puas muaj kev tiv thaiv corrosion zoo?
Nws muaj nruab nrab corrosion kuj, tshwj xeeb tshaj yog tsis kam mus rau hydrogen nres, haum rau hnyav txheej txheem ib puag ncig hauv petrochemical industries.
SA387 GR 11 CLASS 1 piv rau stainless hlau li cas ntawm cov nqi thiab daim ntawv thov?
Nws yog tus nqi ntau dua -zoo dua stainless hlau, haum rau Cr-Mo tshaj- qhov kub thiab txias ib puag ncig, thaum stainless hlau yog nyiam rau cov kev xav tau muaj zog corrosion.
Dab tsi yog qhov txawv ntawm qhov siab -kub ductility ntawm SA387 GR 11 CLASS 1 thiab SA387 GR 91?
GR 91 muaj cov ntsiab lus chromium ntau dua thiab zoo dua siab dua -kub ductility, thaum GR 11 CLASS 1 yog tus nqi ntau dua- siv tau rau nruab nrab- cov ntawv thov kub.
SA387 GR 11 CLASS 1 puas tuaj yeem siv los tsim cov khoom siv hluav taws xob sib txawv?
Yog lawm, nws cov yam ntxwv zoo ntawm kev hloov pauv cua sov thiab thermal qaug zog ua rau nws tsim nyog rau cov cua kub exchanger daim hlau thiab cov hlab.
Txoj kev tshuaj xyuas dab tsi yuav tsum tau ua rau SA387 GR 11 CLASS 1 tom qab kev kho cua sov?
Nws yuav tsum tau kuaj cov cuab yeej cuab tam (tensile, cuam tshuam), kev tshuaj xyuas microstructure, thiab tsis yog - kuaj kev puas tsuaj (ultrasonic, radiographic) kom tau raws li ASME cov qauv.
Puas yog SA387 GR 11 CLASS 1 haum rau kev tsim khoom siab -kub piping flanges?
Yog lawm, nws tuaj yeem tiv taus kev caij tsheb kauj vab thiab kev ntxhov siab, kom ntseeg tau tias cov xau{0}} nruj kev sib txuas hauv siab - kub thiab siab - cov kav dej siab.
Dab tsi yuav tsum tau ceev faj thaum vuam SA387 GR 11 CLASS 1?
Preheating ua ntej welding thiab tom qab-weld kho cua sov yog tsim nyog los tiv thaiv weld tawg thiab tswj cov khoom siv kho tshuab.