Dab tsi yog qib sib npaug rau SA387 Qib 12 Chav Kawm 2 hauv EN lossis JIS cov qauv?
SA387 Qib 12 Chav Kawm 2(tseem hu ua A387 Gr 12 Cl 2) yog lub siab - zoo chrome-molybdenum alloy steel phaj feem ntau yog siv rau cov hlab ntsha siab thiab cov boilers uas tsim los rau kev kub siab.
1. EN (European) Standards
Qhov sib npaug ze tshaj plaws nyob rau hauv European siab nkoj steel phaj tus qauv yog:
TS EN 10028-2: Cov khoom lag luam tiaj tus ua los ntawm cov hlau rau lub hom phiaj siab
Khoom npe: 13CrMo4-5 (Material Number: 1.7335)
Qhov xwm txheej: Feem ntau muab rau hauv qhov normalized (+N) lossis normalized thiab tempered (+ NT) mob kom phim N + T kho ntawm SA387 Gr 12 Cl 2.
Lus Cim: Cov tshuaj muaj pes tsawg leeg (nominally 0.4% Cr, 0.5% Mo) yog qhov zoo sib xws, tab sis tsis yog qhov sib tw 1: 1. Nws yog qhov lees txais thiab dav siv sib npaug rau kev tsim thiab kev yuav khoom hauv Tebchaws Europe.
2. JIS (Japanese) Standards
Qhov sib npaug Japanese sib npaug yog:
JIS G 4118: Chromium-molybdenum alloy steel daim hlau rau cov hlab ntsha siab rau nruab nrab thiab nruab nrab kub kev pabcuam
npe: SCMV 28
Qhov xwm txheej: Tus qauv qhia txog kev kho cua sov kom zoo thiab ua kom sov, ua kom ncaj qha rau "Class 2" mob. Qhov "28" qhia txog qhov tsawg kawg nkaus tensile zog ntawm 28 kgf / mm² (~ 275 MPa).
Tshuaj muaj pes tsawg leeg ntawm SA387 GR.12 CL.2 Phaj
| C | Mn | P | S | Si | Cr | Mo |
| 0.04 - 0.17 | 0.35 - 0.73 | 0.035 | 0.035 | 0.13 - 0.45 | 0.74 - 1.21 | 0.4 - 0.65 |
Mechanical Properties ntawm SA 387 GR.12 CL.2 Phaj
| Tensile zog | Yield zog | Elongationin 200mm (%) | Elongation hauv 50mm (%) |
| 65-85 ksi, 450-585 MPa | 40 Ksi, 275 MPa | 19 | 22 |
Cov lus sib piv tseem ceeb
| Txuj | Qib Qib | Cov xwm txheej rau Match Class 2 | Qhov Tseem Ceeb Zoo sib xws |
|---|---|---|---|
| TS EN 10028-2 | 13CrMo4-5 (1.7335) | + N (Normalized) lossis + NT (Normalized & Tempered) | Zoo sib xws Cr-Mo cov ntsiab lus; Lub hom phiaj yog cov hlab ntsha siab nyob rau hauv nruab nrab temps. |
| TIAB SA 4118 | SWV 28 | Normalized & Tempered (raws li tus qauv) | Qhia ncaj qha N&T mob; zoo li lub zog. |
Kev txiav txim siab tseem ceeb rau "Equivalence"
1.Condition yog yuav tsum tau:"Class 2" txhais tau tias normalized thiab tempered. Txhua qhov sib npaug yuav tsum tau muab rau hauv ib qho xwm txheej (xws li, + NT) uas muab cov khoom sib piv (lub zog, toughness).
2.Tsis yog Chemical Match zoo meej:Thaum nyob ze, qhov tseeb ntawm cov tshuaj muaj pes tsawg leeg (xws li, rau C, Si, Mn) txawv me ntsis ntawm cov qauv. Cov cuab yeej siv kho tshuab thiab tsim tsim kev ntxhov siab yog qhov tseem ceeb ntawm kev sib tw.
3.Code pom zoo yog qhov tseem ceeb:Rau fabricating ib lub nkoj coded (piv txwv li, ASME BPVC, PED), cov qib sib npaug xaiv yuav tsum tau txais los ntawm kev tswj hwm tus qauv tsim thiab pom zoo los ntawm tus kws ua haujlwm lub luag haujlwm. Lub zeb yuav tsum muab cov ntawv pov thawj tsim nyog (piv txwv li, PED 2014/68 / EU Module H rau EN cov khoom).
4.Lwm lub regional kwv yees:
GB (Tuam Tshoj): 15CrMoR qee zaum hais txog, tab sis nws cov khoom muaj pes tsawg leeg (~ 1.0Cr-0.5Mo) yog ze rau SA387 Gr 11. Qhov sib npaug Suav ntau yog 14Cr1MoR.
DIN (Old German): 13CrMo4-4 (1.7334) yog tus thawj coj ntawm qib EN.
Hauv cov ntsiab lus, rau EN cov qauv, qhia 13CrMo4-5 (+ NT). Rau JIS cov qauv, qhia SCMV 28. Ib txwm siv tau qhov tsim nyog los ntawm kev siv cov ntaub ntawv thiab kev pom zoo engineering.
1.Dab tsi yog SA387 Qib 12 Chav Kawm 2?
SA387 Qib 12 Chav Kawm 2 yog chromium-molybdenum alloy steel phaj tsim rau welded siab hlab ntsha, nkag rau hauv lub cev kub thiab tempered- kho mob rau kev txhim kho toughness thiab lub zog.
2.Dab tsi yog qhov txawv ntawm SA387 Gr12 Cl 1 thiab Cl 2?
Qhov sib txawv tseem ceeb yog qhov yuav tsum tau kho cua sov. Qib 12 Chav Kawm 2 yuav tsum tau muab cov khoom qub thiab ua kom sov, thaum Chav Kawm 1 tuaj yeem muab tau raws li -rolled, annealed, lossis normalized thiab tempered, cuam tshuam rau nws cov khoom siv kho tshuab.
3.Dab tsi yog cov tshuaj muaj pes tsawg leeg ntawm SA387 Qib 12 Chav Kawm 2?
Nws cov ntsiab lus muaj xws li Chromium (0.80-1.25%), Molybdenum (0.44-0.65%), Carbon (max 0.17%), Manganese (0.40-0.65%), Silicon (0.15-0.40%), thiab txwv Phosphorus thiab Sulfur.
4.Dab tsi yog cov khoom siv kho tshuab ntawm SA387 Gr12 Cl 2?
Cov khoom tseem ceeb muaj xws li lub zog tensile yam tsawg kawg nkaus ntawm 485 MPa (70 ksi) thiab qhov tsawg kawg nkaus yield zog ntawm 275 MPa (40 ksi) rau thicknesses txog li 65 hli, muaj zog ntau dua li chav 1.
5.Dab tsi yog SA387 Gr12 Cl 2 sib npaug?
Nws yog sib npaug rau ASTM A387 Gr12 Cl 2, ASME SA387 Gr12 Cl 2, thiab cov khoom siv qib UNS K11757. Nws zoo ib yam li 1.25% Cr-0.5% Mo steel.
6.Dab tsi yog kev kho cua sov rau SA387 Qib 12 Chav Kawm 2?
Raws li qhov tshwj xeeb, SA387 Qib 12 Chav Kawm 2 daim hlau tau muab nkag rau hauv qhov qub (kub siab tshaj qhov kub thiab txias thiab huab cua-txias) thiab tom qab tempered (reheated rau ib qho tshwj xeeb sub- kub tseem ceeb) mob.
7.Vim li cas thiaj xaiv Chav Kawm 2 dhau Chav Kawm 1 rau SA387 Qib 12?
Chav Kawm 2 raug xaiv thaum daim ntawv thov yuav tsum tau lees paub lub zog siab dua, zoo dua microstructural uniformity, thiab txhim kho qhov tsis zoo vim nws qhov yuav tsum tau ua kom zoo dua qub thiab tempered.
8.Qhov kev ua haujlwm siab tshaj plaws rau SA387 Gr12 Cl 2 yog dab tsi?
Nws yog feem ntau siv rau kev pabcuam kub txog li 800-850℃F (427-454 degree), tshwj xeeb tshaj yog nyob rau hauv kev pabcuam hydrogen thiab lwm yam kev siv hluav taws xob kub.
9.Yuav ua li cas rau vuam SA387 Qib 12 Chav Kawm 2 hlau?
Vuam yuav tsum tau preheating (feem ntau yog 250-400℃F / 121-204 degree) thiab yuav tsum tau kho tom qab vuam kub (PWHT). Common filler metals muaj xws li AWS E8018-B2 rau SMAW los yog sib npaug.
10.Dab tsi yog qhov nyuaj ntawm SA387 Qib 12 Chav Kawm 2?
Hardness tsis ncaj qha nyob rau hauv tus qauv tab sis yog tswj los ntawm kev kho cua sov thiab txhua yam khoom. Rau kev pabcuam hauv qhov chaw ntub dej H2S, nws feem ntau tau teev tseg kom qis dua 200 HB lossis 22 HRC los tiv thaiv sulfide kev ntxhov siab tawg.
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.
