ASTM A302 Qib Dyog lub siab -lub zog qis- alloy manganese-molybdenum-nickel steel phaj ua raws li ASTM A302 / ASME SA-302M tus qauv. Nws boasts zoo heev txhua yam khoom (tensile zog 550-690MPa, yield zog Ntau tshaj los yog sib npaug rau 345MPa), zoo low{17}} kub toughness (-20℃rau -60℃tej yam tsim nyog) thiab high-temperature kuj (txog 410 degree). Ua tiav ntawm qhov yuav tsum tau normalizing + tempering, nws muaj superior weldability, formability thiab hydrogen corrosion kuj. Dav siv nyob rau hauv petrochemical, fais fab thiab nuclear industries, nws yog ib tug txhim khu kev qha cov ntaub ntawv rau siab hlab ntsha, boiler nruas, tshav kub exchangers thiab lwm yam tseem ceeb heev cov khoom siv.
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A302 Qib D tshuaj muaj pes tsawg leeg |
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Carbon, max |
% |
Manganese, max |
% |
Silicon, max |
% |
Sulfur max |
% |
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25mm los yog qis dua |
0.2 |
Kev Ntsuas Kub |
1.15-1.50 |
Kev Ntsuas Kub |
0.15-0.40 |
Tag nrho cov tuab |
0.035 |
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25-50 hli |
0.23 |
Kev tshuaj xyuas khoom |
1.07-1.62 |
Kev tshuaj xyuas khoom |
0.13-0.45 |
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tshaj 50mm |
0.25 |
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|
|
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Molybdenum max |
% |
Nickel max |
% |
Phosphorus |
% |
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|
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Kev Ntsuas Kub |
0.45-0.60 |
Kev Ntsuas Kub |
0.70-1.00 |
Tag nrho cov tuab |
0.035 |
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|
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Kev tshuaj xyuas khoom |
0.41-0.64 |
Kev tshuaj xyuas khoom |
0.67-1.03 |
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Mechanical Property ntawm A302 Qib D steel phaj |
A302 Qib D |
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Tensile zog, kis [MPa] |
80-100 [550-690] |
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Yield zog, min, kis [MPa] |
50 [345] |
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Elongation hauv 8 nti [200 mm], min, % |
17 |
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Elongation hauv 2 nti [50 mm], min, % |
20 |
Core Industrial Applications
Petrochemical & Refineries:Siv rau kev tsim cov reactors, cov kab distillation, thiab cov hlab ntsha siab uas yuav tsum tau tiv taus cov tshuaj corrosive thiab kev ua haujlwm siab.
Zog & Lub Zog Tsim:Pom nyob rau hauv siab -siab boilers, ncu nruas, thiab cua kub exchangers nyob rau hauv lub fais fab nroj tsuag.
Roj & Roj Projects:Kev siv dav dav rau cov loj- cov tso tsheb hlau luam loj (ob qho tib si rau cov roj thiab cov kua) thiab cov kav dej tshwj xeeb hauv cov dej hiav txwv thiab cov dej hiav txwv.
Cov khoom siv tshwj xeeb
Thaum tshav kub kub Exchangers:Nws lub peev xwm los tswj cov txheej txheem kev ncaj ncees ntawm qhov kub siab ua rau nws zoo tagnrho rau kev sib pauv sab hauv.
Gas Cia Spheres:Feem ntau siv rau lub tank kheej kheej tsim los tuav cov pa roj carbon monoxide nyob rau hauv qhov siab heev.
Nuclear Cheebtsam:Vim nws cov manganese -molybdenum-nickel muaj pes tsawg leeg, nws muaj keeb kwm tau siv nyob rau hauv ib co nuclear reactor siab cov hlab ntsha (RPV) yuav tsum tau muaj kev puas siab puas ntsws toughness.
Cov xwm txheej tseem ceeb ntawm kev ua haujlwm
ASTM A302 Qib D feem ntau yog xaiv rau cov haujlwm uas suav nrog:
Siab Siab:Qhov twg txheem carbon steel daim hlau yuav xav tau ntau thickness.
Qhov kub thiab txias:Feem ntau siv tau los ntawm -20℃txog 500 degree.
Welded kev tsim kho:Tshwj xeeb tsim rau welded boilers qhov twg weld-zone toughness yog qhov tseem ceeb.
Vim li cas thiaj xaiv peb:
Koj tuaj yeem tau txais cov khoom zoo meej raws li qhov koj xav tau ntawm tus nqi tsawg kawg nkaus.
Peb kuj muab Reworks, FOB, CFR, CIF, thiab qhov rooj rau qhov rooj tus nqi xa khoom. Peb xav kom koj ua deal rau shipping uas yuav zoo heev.
Cov ntaub ntawv uas peb muab yog muaj tseeb tiag, txoj cai los ntawm raw cov ntaub ntawv xeem daim ntawv pov thawj mus rau qhov kawg dimensional nqe lus.
Peb lav muab cov lus teb tsis pub dhau 24 teev (feem ntau hauv tib lub sijhawm)
Koj tuaj yeem tau txais cov khoom hloov pauv, zeb xa khoom nrog txo lub sijhawm tsim khoom.
Peb tau mob siab rau peb cov neeg siv khoom. Yog tias nws yuav tsis tuaj yeem ua tau raws li koj cov kev xav tau tom qab kuaj xyuas tag nrho cov kev xaiv, peb yuav tsis ntxias koj los ntawm kev cog lus tsis tseeb uas yuav tsim kev sib raug zoo rau cov neeg siv khoom.
Yog xav paub ntxiv txog GNEE cov khoom siv hlau, tiv tauj peb ntawm beam@gneesteelgroup.com. Peb tos ntsoov yuav ua haujlwm nrog koj.
Lub thermal conductivity ntawm A302 Qib D yog dab tsi?
Ntawm 20 degree, nws cov thermal conductivity yog kwv yees li 48 W / (m·K), thiab nws txo qis me ntsis nrog nce kub. Qhov zoo thermal conductivity no ua kom cov cua sov tsis sib xws hauv siab - cov khoom siv kub, txo cov thermal stress.
Yuav ua li cas khaws A302 Qib D daim hlau kom tiv thaiv kev puas tsuaj?
Khaws rau hauv qhov chaw qhuav, zoo- qhov chaw tso cua, tsis txhob los nag thiab ya raws, tso daim hlau rau ntawm cov ntoo pallets kom tiv thaiv kev sib cuag nrog hauv av, thiab siv cov roj los tiv thaiv - xeb rau saum npoo rau ntev - lub sij hawm cia kom tiv thaiv oxidation thiab xeb.
Dab tsi yog machinability ntawm A302 Qib D?
Nws muaj kev ua haujlwm zoo thaum tshav kub kub- kho. Siv cov cuab yeej siab -ceev steel los yog carbide, txais yuav cov kev txiav kom tsim nyog (ceev, pub tus nqi), thiab siv cov kua txiav los txo qhov hnav thiab txhim kho qhov chaw tiav ntawm cov khoom siv machined.
A302 Qib D puas tuaj yeem siv rau hauv petrochemical reactors?
Yog, nws yog tsim rau petrochemical reactors. Nws tuaj yeem tiv taus qhov kub thiab txias, kub siab, thiab corrosion ntawm cov organic media hauv reactors, ua kom ruaj khov thiab ua haujlwm ntev ntawm cov khoom siv petrochemical.
Dab tsi yog qhov coefficient ntawm thermal expansion ntawm A302 Qib D?
Nws linear thermal expansion coefficient yog hais txog 11.7 × 10⁻⁶ /℃(20-100 degree). Qhov kev ntsuas no yog qhov tseem ceeb rau kev tsim cov khoom siv kub-kub los them rau thermal expansion thiab tsis txhob muaj cov qauv deformation.
Dab tsi yuav tsum tau zam thaum lub sij hawm tsim khoom ntawm A302 Qib D?
Cov teeb meem tseem ceeb kom tsis txhob muaj xws li porosity, suav nrog, tawg (kub lossis txias), thiab tsis sib xws. Kev tswj nruj nruj ntawm kev sib tsoo, dov, thiab cov txheej txheem kho cua sov, nrog rau kev ua kom zoo tsis zoo -kev sim ua kom puas tsuaj, ua kom muaj kev puas tsuaj - khoom dawb.
Qhov txawv ntawm A302 Qib D thiab A516 Qib 70 yog dab tsi?
A302 Qib D yog qis- alloy steel nrog kub dua / siab tsis kam, thaum A516 Qib 70 yog carbon steel. Qib D muaj kev nkag siab zoo dua ntawm qhov kub thiab txias, haum rau cov kev pabcuam hnyav dua.
A302 Qib D puas tuaj yeem siv rau cov kav dej?
Yog, nws yog ib qho khoom siv zoo heev rau cov kav dej. Nws lub zog tensile siab, zoo cuam tshuam toughness, thiab tsis kam mus rau siab -kub chav corrosion ua kom muaj kev nyab xeeb thiab txhim khu kev qha kev thauj mus los ntawm siab - siab zog hauv cov nroj tsuag fais fab.
Dab tsi yog qhov yuav tsum tau elongation ntawm A302 Qib D?
Qhov tsawg kawg nkaus elongation (hauv 200 mm) yog 22%. Qhov siab elongation no qhia tau hais tias zoo ductility, tso cai rau cov hlau mus rau cov yas deformation yam tsis muaj kev puas tsuaj nyob rau hauv load, txhim khu kev ntseeg ntawm cov khoom.
Cov kev kho saum npoo dab tsi muaj feem xyuam rau A302 Qib D?
Cov kev kho saum npoo siv tau suav nrog kev tua blasting (kom tshem tawm xeb thiab nplai), pleev xim (epoxy lossis polyurethane txheej), thiab galvanizing (rau kev txhim kho corrosion nyob rau sab nraum zoov lossis qhov chaw ntub dej), ncua kev pab cuam lub neej.
Cov ntawv pov thawj zoo dab tsi feem ntau yog muab nrog A302 Qib D cov khoom?
Cov ntawv pov thawj zoo muaj xws li ASTM cov ntaub ntawv pov thawj (MTC), cov ntaub ntawv tshuaj muaj pes tsawg leeg, daim ntawv qhia txog cov cuab yeej cuab tam, tsis yog - daim ntawv ntsuam xyuas kev puas tsuaj, thiab cov ntaub ntawv kho cua sov, kom ua raws li cov qauv.