ASTM A203 Qib B yog dab tsi?
ASTM A203 Qib Byog npib tsib xee- alloy steel phaj, feem ntau hu ua "2% nickel steel," feem ntau yog siv rau welded siab hlab ntsha, boilers, thiab cia tso tsheb hlau luam nyob rau hauv nruab nrab - mus rau qis- kub kev pab cuam. Nws muab kev txhawb nqa kom zoo dua qub, lub zog siab dua (tsawg kawg tawm los ~ 275 MPa), thiab tiv thaiv kev cuam tshuam, ua rau nws zoo tagnrho rau cov roj, roj, thiab tshuaj lom neeg kev lag luam.
ASTM A203 Qib B yog qib siab -kev ua tau zoo nickel- alloy steel phaj tshwj xeeb tsim los rau kev tsim cov welded siab hlab ntsha thiab boilers. Nws tus yam ntxwv txhais tau tias yog qhov sib ntxiv ntawm kwv yees li 2.25% npib tsib xee, uas ua rau nws qhov hnyav hnyav ntawm sub- xoom kub. Tsis zoo li cov qauv carbon steels uas ua rau muaj kev phom sij thaum txias, A203 Qib B yog tsim los tswj lub zog nqus thiab kev ua haujlwm zoo hauv qhov chaw txias li -75℃F (-59℃). Nws yog ib qho tseem ceeb ntawm cov khoom siv rau kev lag luam uas khaws lossis ua cov roj liquefied thiab tshuaj lom neeg, muab kev nyab xeeb tseem ceeb tiv thaiv kev puas tsuaj rau cov pob txha tawg hauv cov txheej txheem siab.
Cov yam ntxwv tseem ceeb
Cryogenic Resilience:Tshwj xeeb tsim los tuav lub zog muaj zog hauv qhov txias - huab cua lossis cov tub yees txias.
Grain Refinement:Nickel txhawb nqa kev nplua -cov pob txha pob txha, uas ua rau qeeb qeeb kev nthuav tawm hauv kev ntxhov siab.
Zoo heev Ductility:Muab cov khoom elongation siab, tso cai rau cov khoom kom deform yam xyuam xim ua ntej ua tsis tiav nyob rau hauv siab heev.
Moderate Yield Strength:Muab cov txiaj ntsig yam tsawg kawg nkaus ntawm 40 ksi (275 MPa), muab lub hauv paus txhim khu kev qha rau hnyav - cov qauv tsim qauv.
Corrosion Inhibition:Cov ntsiab lus nickel muab me ntsis zoo dua rau atmospheric corrosion piv rau unalloyed carbon steels.
Qib Qib
ASTM:American Society for Testing and Materials.
A:Prefix rau Ferrous (hlau{0}}raws li) cov ntaub ntawv.
203:Cov txheej txheem tshwj xeeb rau Nickel Alloy Steel siab nkoj daim hlau.
Qib B:Lub zog tensile siab dua (70-90 ksi) hauv 2.25% Nickel tsev neeg.
Kev sib piv (vs. ASTM A516 Qib 70)
Chemical complexity:A203 Qib B yog cov hlau alloy uas muaj2.25% Nickel yog '; A516 yog ib qho zoo -grain carbon-manganese steel uas tsis txhob txwm nickel ntxiv.
Tensile zog:A203 Qib B (70–90 ksi) muaj lub zog ntau dua - rau - qhov hnyav piv dua A516 Gr 70 (70 ksi min), txawm tias lawv qhov tsawg kawg yog pib ntawm tib lub ntsiab lus.
Thermal Window:A203 yog qhov tshwj xeeb rau kev pabcuam-75 ° F (-59 ° C), whereas A516 Gr 70 feem ntau txwv rau-50 ° F (-46 ° F).
Weldability:A516 yog tshwj xeeb tshaj yog yooj yim rau weld; A203 yuav tsum muaj kev tswj hwm nruj dua ntawm cov qib hydrogen thiab cov nickel tshwj xeeb-match consumables (xws li E8018-C1) kom ntseeg tau tias cov hlau weld sib phim lub hauv paus hlau lub toughness.
Daim Ntawv Thov Kev Sib Tham
LPG Cia Spheres:Spherical tanks siv rau kev khaws cia ntawm cov roj liquefied roj av.
Tsawg-Tub kub Exchangers:Plhaub-thiab- cov khoom siv raj siv hauv cov chaw ua roj.
Arctic Structural Brackets:Kev txhawb nqa hnyav rau cov khoom siv ntawm cov roj av offshore platforms hauv cheeb tsam polar.
Carbon Dioxide Tank:Cov nkoj khaws cia cov kua CO2 rau kev lag luam zaub mov thiab dej haus.
ASTM A203 Qib B ua haujlwm li cas hauv siab -ib puag ncig siab?
ASTM A203 Qib B tshwj xeeb yog tsim los ua kom tau zoo nyob rau hauv siab -siab, uas yog ib qho ntawm cov laj thawj tseem ceeb uas nws siv hauv cov hlab ntsha siab thiab lwm yam kev tsim kho tseem ceeb. Cov hlau muaj zog tensile siab (485-}620 MPa) thiab lub zog tawm los (tsawg kawg 205 MPa) ua rau nws tsim nyog rau cov ntawv thov uas cov ntaub ntawv raug rau ob qho tib si siab thiab kub kub. Nws tiv thaiv kev ntxhov siab thiab qaug zog kuj ua kom ntseeg tau tias nws yuav tswj hwm nws cov qauv kev ncaj ncees thiab kev nyab xeeb hauv cov tshuab hluav taws xob siab, xws li cov uas pom hauv cov nroj tsuag petrochemical lossis offshore rigs.
Dab tsi yog qhov txawv ntawm ASTM A203 Qib B thiab lwm qib zoo li A203 Qib D?
ASTM A203 Qib B thiab A203 Qib D yog ob qho tib si npib tsib xee- alloy steels siv rau cov hlab ntsha siab, tab sis Qib D feem ntau muaj cov ntsiab lus nickel ntau dua li Qib B. Qhov no muab Qib D me ntsis zoo dua qis dua - qhov kub thiab txias, ua rau nws haum rau qhov chaw txias heev. Txawm li cas los xij, Qib B tseem muaj kev ua tau zoo rau feem ntau cov ntawv thov thiab feem ntau xaiv rau nws tus nqi -kev ua tau zoo. Ob qib yog siv hauv kev lag luam zoo sib xws, tab sis kev xaiv ntawm lawv nyob ntawm qhov tshwj xeeb kub thiab siab ntawm daim ntawv thov.
Lub xub ntiag ntawm nickel cuam tshuam li cas rau ASTM A203 Qib B?
Nickel yog ib qho tseem ceeb hauv ASTM A203 Qib B steel, vim nws txhim kho cov hlau tawv, lub zog, thiab tsis kam tiv thaiv corrosion. Cov ntsiab lus nickel siab dua txhim kho cov hlau muaj peev xwm tiv taus qhov kub thiab txias, ua rau nws zoo tagnrho rau kev siv cryogenic. Nws kuj tseem ua rau cov khoom siv tiv thaiv kev ntxhov siab tawg thiab qaug zog, uas yog qhov tseem ceeb nyob rau hauv siab - siab lossis siab - ib puag ncig kev ntxhov siab. Tsis tas li ntawd, cov ntsiab lus npib tsib xee ua kom cov hlau khaws nws cov qauv kev ncaj ncees thiab ua haujlwm rau cov tshuaj corrosion, txawm tias nyob rau hauv ib puag ncig hnyav.
| Lub cev muaj zog | Metric | Lus Askiv |
|---|---|---|
| Qhov ntom | 7.80 g / ct | 0.282 lb/in³ |
| Mechanical Properties | Metric | Lus Askiv |
| Tensile Strength, Qhov kawg | 485 - 620 MPa | 70300 - 89900 psi |
| Tensile zog, tawm los | 275 MPa rau | 3 9900 psi |
| Elongation ntawm Break | 17 % | 17 % |
| 21 % | 21 % | |
| Modulus ntawm Elasticity | 200 GPa | 29 000 ksg |
| Bulk Modulus | 160 GPa | 23 200 TZS |
| Poissons Ratio | 0.29 | 0.29 |
| Shear Modulus | 80.0 GPA | 11 600 ksg |
| Component Elements Properties | Metric | Lus Askiv |
| Carbon, C | 0.25 % | 0.25 % |
| Hlau, Fe | 96.3 % | 96.3 % |
| Manganese, Mn | 0.80 % | 0.80 % |
| Nickel, Nia | 2.1 - 2.5 % | 2.1 - 2.5 % |
| Phosphorus, P | 0.035 % | 0.035 % |
| Silicon, Sib | 0.15 - 0.40 % | 0.15 - 0.40 % |
| Sulfur, S | 0.040 % | 0.040 % |
1. ASTM A203 Qib B steel yog dab tsi?
ASTM A203 Qib B yog qib qis- alloy steel nrog cov ntsiab lus nickel siab (3.50-5.00%) tsim los siv rau hauv cov hlab ntsha siab thiab cov qauv uas xav tau lub zog siab thiab zoo heev toughness ntawm qhov kub thiab txias. Nws yog ib feem ntawm ASTM A203, uas suav nrog npib tsib xee- alloy steels siv hauv cov ntawv thov cryogenic thiab cov chaw ua haujlwm hnyav. Nws cov khoom ua rau nws tiv taus kev ntxhov siab thiab corrosion, tshwj xeeb tshaj yog nyob rau hauv qhov kub thiab txias.
2. Dab tsi yog cov khoom siv ntawm ASTM A203 Qib B steel?
ASTM A203 Qib B steel muaj lub zog tensile yam tsawg kawg nkaus ntawm 485-620 MPa (70-90 ksi), thiab nws cov yield zog tsawg kawg yog 205 MPa (30 ksi). Nws muaj cov tawv tawv zoo heev, tshwj xeeb tshaj yog nyob rau qhov kub thiab txias, thiab muaj kev tiv thaiv siab rau ob qho tib si kev ntxhov siab thiab tawg. Cov khoom siv yog tsim los ua nyob rau hauv qhov xav tau ib puag ncig xws li cryogenic cia lossis cov hlab ntsha siab. Cov hlau no cov khoom siv kho tshuab ua rau nws tsim nyog rau kev siv cov txheej txheem uas ob qho tib si lub zog thiab ductility tseem ceeb heev.
3. ASTM A203 Qib B piv rau lwm cov hlab ntsha siab li cas?
Piv nrog rau lwm cov hlab ntsha siab, ASTM A203 Qib B muaj kev ua tau zoo tshaj plaws nyob rau hauv qis- qhov kub thiab txias, ua tsaug rau nws cov ntsiab lus siab nickel. Txawm hais tias cov hlau zoo sib xws tuaj yeem muaj lub zog zoo tag nrho thiab tiv thaiv corrosion, ASTM A203 Qib B sawv tawm rau nws qhov tshwj xeeb toughness ntawm sub- xoom kub. Qhov no ua rau nws tshwj xeeb tshaj yog haum rau cov ntawv thov hauv cryogenics, aerospace, thiab offshore industries. Cov khoom siv kuj muaj cov weldability zoo heev, uas ntxiv dag zog rau nws qhov tsim nyog rau cov txheej txheem nyuaj uas raug kev nyuaj siab heev.
4. Dab tsi yog qhov cuam tshuam ntawm ASTM A203 Qib B ntawm qhov kub thiab txias?
ASTM A203 Qib B steel ua tau zoo nyob rau hauv qis- qhov kub thiab txias tsis kam, uas yog ib qho ntawm nws cov yam ntxwv tseem ceeb. Cov ntsiab lus npib tsib xee siab pab cov khoom siv tuav nws cov tawv nqaij thiab tiv thaiv kom tawg tawg ntawm qhov kub tsis tshua muaj siab. Qhov no yog ib qho tseem ceeb rau cov ntawv thov xws li cryogenic cia tso tsheb hlau luam thiab cov hlab ntsha siab siv hauv kev lag luam roj thiab roj, uas cov ntaub ntawv raug rau qhov chaw txias heev. Cov hlau muaj peev xwm nqus tau lub zog tsis muaj kev tawg ua kom muaj kev nyab xeeb thiab kev ntseeg siab hauv cov xwm txheej hnyav no.
5. ASTM A203 Qib B steel siv nyob qhov twg?
ASTM A203 Qib B steel feem ntau yog siv rau hauv kev tsim cov hlab ntsha siab, tso tsheb hlau luam, thiab cov khoom siv hluav taws xob, tshwj xeeb hauv kev lag luam xws li roj thiab roj, petrochemical, thiab cryogenics. Nws muaj peev xwm tiv taus qhov kub thiab txias thiab siab - ib puag ncig siab ua rau nws zoo tagnrho rau cov ntawv thov xws li LNG (liquefied natural gas) cia thiab offshore roj platforms. Cov hlau yog tsim los tswj nws cov tawv tawv thiab tiv thaiv kev tawg txawm tias nyob rau hauv huab cua txias, uas yog qhov tseem ceeb hauv cov ntawv tshwj xeeb no.
6. Qhov siab tshaj plaws thickness ntawm ASTM A203 Qib B yog dab tsi?
Qhov siab tshaj plaws ntawm ASTM A203 Qib B steel daim hlau yog feem ntau mus txog 100 hli (4 ntiv tes), txawm hais tias cov ntu tuab tuaj yeem ua tau raws li cov kev xav tau tshwj xeeb. Lub thickness ntawm lub phaj yuav txawv nyob ntawm seb tus tsim yuav tsum tau ntawm lub siab hlab ntsha los yog cov qauv uas yog fabricated. Cov phaj tuab feem ntau yuav tsum tau muaj nyob rau hauv loj - daim ntawv thov xws li offshore rigs, tank cia, los yog siab - siab reactors, qhov ntau dua structural kev ncaj ncees yog qhov tseem ceeb los tiv thaiv cov kev xav tau ntawm ib puag ncig.
7. ASTM A203 Qib B steel ua li cas?
ASTM A203 Qib B steel yog tsim los ntawm cov txheej txheem uas muaj kev tswj cov melting thiab refining ntawm cov hlau ua raws li kub dov. Cov hlau yog tom qab cua sov- kho kom tsim tau nws cov khoom siv kho tshuab uas xav tau. Kev kho cua sov feem ntau muaj kev sib xyaw ua ke ntawm annealing thiab tempering los ua kom muaj zog, lub zog, thiab tiv thaiv kom tawg. Cov khoom raug kuaj xyuas kom ntseeg tau tias nws ua tau raws li qhov yuav tsum tau teev tseg hauv ASTM A203 tus qauv ua ntej nws siv rau hauv cov hlab ntsha siab lossis lwm yam kev siv tseem ceeb.
Yog tias koj xav paub ntxiv txog ASTM A203 Qib B GNEE cov khoom, koj tuaj yeem xa email rau toinfo@gneesteels.com . Peb zoo siab tshaj los pab koj.
