ASTM A516 Qib 70yog ib qho kev qhia tshwj xeeb rau carbon steel daim hlau npaj rau kev siv lub nkoj siab hauv nruab nrab thiab qis -kev pabcuam kub, tawm los ntawm ASTM International (yav tas los American Society for Testing and Materials).
Qib 70 qhia tias muaj zog tensile ntau yam ntawm485-620 MPathiab qhov tsawg kawg nkaus yield zog ntawm260 MPa (38 ksi).
Thaum tau teev tseg rau kev pabcuam qaub (ntub hydrogen sulfide, H₂S ib puag ncig), ASTM A516 Qib 70 steel daim hlau yuav raug tsim los nrog kev txhim kho steel huv thiab cov kev ntsuas ntxiv los txhim kho kev tiv thaiv Hydrogen Induced Cracking (HIC) thiab Sulfide Stress Cracking (SSC).
Cov kev cai no feem ntau yog siv raws li:
- NACE MR0175 / ISO 15156 (Kev xaiv cov khoom siv rau kev pabcuam qaub)
- NACE TM0284 (HIC kuaj, thaum teev)
- NACE TM0177 (SSC xeem, thaum teev)
Nyob rau hauv luv luv, ASTM A516 Qib 70 NACE MR0175 Steel Phaj hais txog lub siab hlab ntsha steel cov khoom tsim los rau kev pab cuam nyob rau hauv hydrogen sulfide (H₂S) ib puag ncig uas yuav tsum tau txhim khu kev tiv thaiv kom tawg.
✅ Txaus siab rau cov khoom no?
Nyem qhov no mus thov cov ntaub ntawv qhia kev & daim ntawv pov thawj zeb xeem
Nyem kom tau daim ntawv pov thawj
Vim li cas cov cuab yeej ua tsis tau nyob rau hauv ntub Hydrogen Sulfide ib puag ncig?
1. Hydrogen Induced Cracking (HIC)
Hauv qhov chaw ntub dej hydrogen sulfide (H₂S) ib puag ncig, hydrogen sulfide dissociates electrochemically, tsim atomic hydrogen. Cov hydrogen atoms no kis mus rau hauv cov hlau lattice thiab sib sau ua ke ntawm cov ntxiab sab hauv xws li cov khoom tsis yog-hlau inclusions thiab segregation zones.
Thaum hydrogen recombines rau hauv molecular hydrogen, lub siab sab hauv tsim thiab ua rau cov kab nrib pleb nyob rau hauv parallel mus rau dov kev taw qhia ntawm steel phaj. Qhov tshwm sim no hu ua Hydrogen Induced Cracking (HIC).
Cov yam ntxwv tseem ceeb ntawm HIC:
- Qhov tshwm sim tsis muaj kev ntxhov siab sab nraud
- Feem ntau nyob rau hauv nruab nrab segregation aav ntawm tuab daim hlau
- Muaj zog cuam tshuam los ntawm steel kev huv huv thiab kev tswj kev suav nrog
2. Sulfide Stress Cracking (SSC)
SSC yog ib daim ntawv ntawm hydrogen - pab tawg uas tshwm sim nyob rau hauv tensile kev nyuaj siab nyob rau hauv qaub ib puag ncig.
Hydrogen diffuses mus rau hauv cov hlau thiab accumulates nyob rau hauv kev nyuaj siab cheeb tsam xws li welds, notches, thiab grain ciam teb. Qhov no txo cov ductility thiab ua rau nkig tawg ntawm qhov kev ntxhov siab hauv qab cov khoom siv lub zog tensile.
SSC feem ntau tshwm sim hauv:
- Weld tshav kub- thaj chaw cuam tshuam (HAZ)
- High hardness cheeb tsam
- High residual stress chaw
Kev txhawj xeeb txog HIC/SSC kev pheej hmoo hauv koj cov khoom siv?
GNEE Steel's A516 Gr.70 NACE MR0175 daim hlau raug kuaj tag nrho rau NACE TM0284 & TM0177.
Vim li cas ASTM A516 Qib 70 NACE Steel Siv rau Cov Kev Pab Cuam Siab Siab
Qhov sib txawv ntawm cov qauv ASTM A516 Qib 70 thiab cov kev pabcuam qaub (NACE- taw qhia) cov ntaub ntawv nyob rau hauv kev txhim kho steelmaking kev coj ua thiab cov kev xeem ntxiv.
| Yam khoom | Txheem A516 Gr.70 | Kev Pab Cuam Qab Zib (NACE-Oriented) |
|---|---|---|
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.035% | Feem ntau Tsawg dua lossis sib npaug rau 0.005% (qhov project nyob ntawm) |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.035% | Feem ntau Tsawg dua lossis sib npaug rau 0.010–0.020% |
| Hardness | Tsis muaj kev txwv nruj | Feem ntau tswj tau (tsawg dua lossis sib npaug rau 200 HBW, nyob ntawm qhov project) |
| Kev xeem HIC | Tsis xav tau | Ib NACE TM0284 (yog tias muaj) |
| Kev xeem SSC | Tsis xav tau | Rau NACE TM0177 (yog tias muaj) |
| Kev kho cua sov | Nyob ntawm thickness | Normalizing thaum xav tau |
Nco tseg: NACE MR0175 / ISO 15156 qhia txog cov cai xaiv cov khoom, txwv tshuaj lom neeg, tswj hardness thiab lees txais cov kev pabcuam qaub H₂S; nws tsis yog ib qho khoom lag luam muaj ntawv pov thawj.
ASTM A516 Qib 70 NACE Steel Chemical Composition
ASTM A516 Qib 70 tshuaj lom neeg muaj pes tsawg leeg txwv txawv los ntawm tuab. Rau cov ntawv thov kev pabcuam qaub, kev tswj xyuas steelmaking nruj dua feem ntau siv.
| Lub ntsiab | ASTM A516 Gr.70 | Hom HIC-Resistant Control |
|---|---|---|
| Cov pa roj carbon (C) | Tsawg dua lossis sib npaug li 0.27–0.31% | Tsawg dua lossis sib npaug li 0.20–0.23% |
| Manganese (Mn) | 0.79–1.30% | 1.00–1.40% |
| Silicon (Si) | 0.13–0.45% | 0.15–0.35% |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.035% | Tsawg dua lossis sib npaug li 0.010–0.020% |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.035% | Tsawg dua lossis sib npaug li 0.002–0.005% |
| Aluminium (Al) | Ntau dua lossis sib npaug li 0.02% | Siv rau deoxidation (tua steel xyaum) |
Cov khoom seem xws li Cr, Ni, Mo, V tuaj yeem muaj nyob ntawm kev xyaum ua steel tab sis tsis tau teev tseg hauv ASTM A516.
ASTM A516 Qib 70 Mechanical Properties
| Khoom | Tus nqi |
|---|---|
| Yield zog | Ntau dua lossis sib npaug li 260 MPa |
| Tensile zog | 485-620 MPa |
| Elongation (GL =200 hli) | Ntau dua lossis sib npaug li 17% |
| Elongation (GL =50 hli) | Ntau dua lossis sib npaug li 21% |
| Qhov xwm txheej | Raws li dov / Normalized (nyob ntawm thickness) |
Kev kuaj ntxiv (thaum teev tseg)
- HIC Test: NACE TM0284
- SSC Test: NACE TM0177
- Kev Ntsuas Kev Ntsuas: Raws li ASTM A20 cov kev xav tau ntxiv
- Kev Ntsuas Ultrasonic: ASTM A578 / EN 10160
Plaub Core Sulfur-Resistant Advantages ntawm A516 Gr.70 NACE Steel Phaj
Ultra-Low Sulfur & Phosphorus nrog huv Steel Smelting
NACE- qib steel daim hlau txais yuav ob lub tshuab nqus tsev smelting txheej txheem EAF (Electric Arc Rauv) + LF (Ladle Furnace Refining) + VD (Nqus Degassing), txwv cov ntsiab lus hydrogen hauv hlau kom tsawg dua lossis sib npaug li 1.3 ppm. Lub caij no, kev kho calcium yog siv nrog Ca / S piv ntawm 1.8 mus rau 2.5, uas hloov cov sulfide inclusions mus rau spherical CaS inclusions es tsis txhob muaj teeb meem strip -zoo li MnS inclusions. Cov txheej txheem no hauv paus tshem tawm qhov pib ntawm HIC cov kab nrib pleb.
Kev tswj nruj nruj
NACE MR0175 tus qauv tsim kom muaj qhov yuav tsum tau ua kom tawv tawv rau cov pa roj carbon steel: qhov nyuaj ntawm cov hlau hauv paus, vuam hlau thiab cua sov- thaj tsam cuam tshuam yuav tsum tsis pub tshaj 22 HRC. (sib npaug rau 237 HBW lossis 248 HV10). Lub hardness ntawm xa A516 Gr.70 NACE steel daim hlau yog tswj ntawm Tsawg dua los yog sib npaug rau 200 HBW, zoo hauv qab qhov kev txwv saum toj no. Tsawg hardness sib haum mus rau qis susceptibility rau Sulfide Stress Cracking (SSC).
Optimized Microstructure
Normalizing kev kho mob ua rau cov hlau phaj los ua ib qho kev ua kom zoo zoo ferrite -pearlite microstructure. Cov qoob loo loj yuav tsum yog ASTM No.7 lossis finer (txoj kab uas hla Tsawg dua lossis sib npaug li 30 μm), cov qib banded yog tswj tsis pub dhau 1.5, thiab qhov nruab nrab kev sib cais tsis pub dhau 1.05. Lub homogeneous thiab zoo microstructure zoo inhibits hydrogen tsub zuj zuj thiab tawg propagation.
Guaranteed Weldability
Cov pa roj carbon sib npaug (CE) yog txwv tsis pub tsawg dua lossis sib npaug li 0.45%, ua rau cov hlau tsim nyog rau cov cua kub kub input vuam. Ua ke nrog cov txheej txheem vuam nruj xws li qhov ntsuas kub tsawg kawg ntawm 120℃thiab tom qab-weld kev kho cua sov ntawm 600 ~ 625 degree, qhov hardness ntawm weld seams thiab cua sov- thaj tsam cuam tshuam tuaj yeem ua raws li NACE specifications.
Xav tau kev pabcuam qaub steel phaj rau koj qhov project?GNEE Steel muab A516 Gr.70 NACE nrog HIC + SSC dual ntawv pov thawj.
Tau txais ib nqe lus ceev tam sim no
Core Applications ntawm ASTM A516 Gr.70 NACE Steel Phaj
ASTM A516 Gr.70 NACE steel daim hlau feem ntau yog siv rau kev tsim khoomCov hlab ntsha siab ua haujlwm nyob rau hauv ntub dej hydrogen sulfide kev pabcuam.
Cov khoom siv no siv rau ntau yam khoom siv siab, suav nrog cov yees rau cov roj refining thiab cov txheej txheem tshuaj, kev sib cais nruas rau kev kho cov roj av, slug catchers rau roj thiab roj sib sau ua ke thiab kev thauj mus los, cov roj acid rov qab units hauv kev lag luam tshuaj lom neeg, nrog rau kev siab -cov chaw bearing ntawm ntug dej hiav txwv platforms. Tag nrho cov khoom siv no poob rau hauv qeb ntawm cov hlab ntsha siab, uas muaj cov yam ntxwv ntawm kev ua haujlwm: hydrogen sulfide muaj nyob rau hauv cov txheej txheem kev tshaj tawm, kev ua haujlwm siab, thiab qhov tshwm sim loj heev thaum cov khoom siv tsis ua haujlwm.
Lub A516 Gr.70 NACE steel daim hlau muab los ntawm GNEE Steel yog kev cai -engineered rau saum toj no - hais txog cov hlab ntsha siab, ua raws li cov sulfur stringent -cov cai yuav tsum tau teev nyob rau hauv NACE MR0175 / ISO 15156 los ntawm cov khoom siv raw. Koj tsuas yog yuav tsum tau qhia koj qhov kev thov rau sulfur- cov ntawv hlau resistant rau cov hlab ntsha siab, thiab peb yuav muab cov ntaub ntawv pov thawj tag nrho raws li koj qhov project qauv, yam tsis tas yuav tsum tau sau cov khoom siv kom ntxaws ib los ntawm ib qho.
Kev xa khoom thiab xa khoom Specification rau GNEE Steel A516 Gr.70 NACE Steel Phaj
GNEE Steel Supply Specifications
| Parameter | Ntau yam |
|---|---|
| Thickness | 8 ~ 120 hli (Customizable mus txog 200 hli) |
| Dav | 1500 ~ 3200 hli |
| Ntev | 6000 ~ 12000 hli |
| Kev Xa Khoom | Normalized (N); Normalized + Tempered (N + T) muaj |
| Cov qauv siv tau | ASTM A516 / A516M, ASME SA-516 / SA-516M, NACE MR0175 / ISO 15156 |
GNEE Steel Optional Cov Lus Qhia Ntxiv
| Cov khoom ntxiv | Optional Qib / Standard |
|---|---|
| UT Kev Ntsuas Ultrasonic | Qib A / B / C (Ua raws li ASME SA578) |
| Z-Kev Taw Qhia Mechanical Property | Z15 / Z25 / Z35 |
| Simulated Post-Kev kho cua sov (PWHT) | Raws li tus neeg siv khoom qhov kev xav tau |
| Thib peb-Kev Tshawb Fawb Cov Neeg Pom Zoo | SGS / BV / TUV |
| Mill Test Certificate | EN 10204 3.1 lossis 3.2 |
GNEE Steel Kev Ua Haujlwm thiab Kev Pabcuam
GNEE Steel muab tag nrho -kev txhawb nqa cov kev pabcuam uas suav nrog steel phaj txiav rau kev tsim thiab ua ntej, txuas ntxiv cov khoom xa mus rau ib nrab- cov khoom tiav tiav, uas pab koj txuag lub sijhawm ua haujlwm thib ob thiab kev tswj xyuas cov nqi.
CNC nplaim taws & Plasma txiav
High- precision CNC tej cuab yeej yog saws kom paub precision blanking ntawm tshwj xeeb - zoo li tus yam, nkhaus daim hlau thiab lub nplhaib Cheebtsam raws li cov kev cai kos duab. Qhov flatness ntawm tej qhov chaw ua tau raws li lub siab lub nkoj tsim qauv, nrog rau machining nyiaj reserved los yog net - loj me me muaj.
Rau cov phaj tuab dua 50 hli, preheating yuav tsum tau muab coj los siv ua ntej nplaim taws txiav kom zoo tiv thaiv cov kab mob txias txias thiab tsis txhob muaj cov txheej txheem tawv tawv hauv qhov cua sov- thaj tsam cuam tshuam.
Bevel Machining
Ntau hom bevels suav nrog V-hom, X-hom thiab U- hom tuaj yeem ua tiav raws li qhov xav tau los ntawm cov txheej txheem vuam. Ua tiav los ntawm kev siv lub tshuab bevelers lossis gantry ntug milling tshuab, lub kaum sab xis (feem ntau 30℃~ 37.5 degree), hauv paus ntsej muag loj (1 ~ 3 hli) thiab nto roughness tuaj yeem tswj tau ib qho duab kos. Lub tshuab bevel nto yog du, burr-dawb thiab roj-dawb, ua kom ncaj qha sib dhos thiab vuam thaum tuaj txog.
Phaj Rolling rau lub tog raj kheej
Nruab nrog hnyav- lub luag haujlwm phaj dov tshuab rau lub tog raj kheej sib sau. Cov txheej txheem txias dov thiab kub dov yog muaj: txias txoj kev yog saws rau nyias daim hlau los yog cylinders nrog tsawg dov nyuaj; kub dov nrog nruj tswj cua kub kub yog siv rau tuab los yog siab - lub zog steel thooj voos kheej kheej, ua raws li normalizing los yog tempering los kho cov khoom siv. Qhov tseeb dov (ovality, misalignment) ua raws li kev sib dhos tshwj xeeb rau lub tog raj kheej siab.
Ua ntej-Blasting Derusting & Khw Primer Txheej
Nruam txhaj tshuaj blasting tshuab yog siv los tshem tawm zeb nplai thiab xeb los ntawm steel phaj nto mus rau Sa2.5 nyob ze - qib dawb, nrog rau qhov roughness ntawm 40 μm mus rau 75 μm. Inorganic zinc silicate khw primer nrog ib tug qhuav zaj duab xis thickness ntawm 15 ~ 25 μm yuav tsum tau sprayed nyob rau hauv 4 teev tom qab derusting kom zoo tiv thaiv re- xeb thaum lub sij hawm cia, tsheb thauj mus los thiab fabrication. Cov txheej txheej primer yuav tsis cuam tshuam nrog cov vuam txuas ntxiv thiab tuaj yeem tshem tau yooj yim ua ntej vuam.
Nrhiav A516 Gr.70 NACE daim hlau rau koj cov kev pabcuam qaub siab?
GNEE Steel muaj tag nrho traceability, HIC + SSC ntawv pov thawj, thiab hloov tau cov kev pab cuam. Xa koj qhov kev thov tshwj xeeb rau peb - peb yuav teb nrog cov ntaub ntawv thiab nqe lus tam sim.
Ntim & Xa
Standard Export Ntim: Hlau daim hlau yog bundled nrog steel strips thiab txhawb los ntawm cov neeg pw tsaug zog nyob rau hauv qab kom yooj yim loading thiab unloading. Rau kev thauj mus los hauv hiav txwv, steel thav duab lossis rooj plaub ntoo raug coj los lav tsis muaj deformation thaum lub sijhawm ntev - kev thauj mus los hauv hiav txwv.
Cov dej noo-Kev tiv thaiv pov thawj: Lub phaj saum npoo yog npog nrog cov ntaub thaiv dej tsis muaj dej lossis cov yeeb yaj kiab yas kom tsis txhob muaj xeb los ntawm cov dej hiav txwv ntsev.
FAQ
Dab tsi yog qhov txawv ntawm ASTM A516 Qib 70 thiab A516 Qib 70 HIC?
Txheem ASTM A516 Qib 70 yog npaj rau kev siv lub nkoj siab dav dav, thaum HIC version yog tsim los nrog kev ua kom huv huv steelmaking, qis cov ntsiab lus ntawm sulfur, nqus degassing, thiab HIC kuaj rau cov kev pabcuam qaub.
Puas yog ASTM A516 Qib 70 HIC ua raws NACE MR0175?
Cov hlau phaj nws tus kheej yog tsim los rau ASTM A516 / A516M. Thaum txiav txim rau cov kev pabcuam qaub, nws tuaj yeem muab tau kom tau raws li cov khoom siv ntawm NACE MR0175 / ISO 15156 ua ke nrog HIC cov cai kuaj xyuas los ntawm tus neeg yuav khoom.
A516 qib 70 specification yog dab tsi?
ASTM A516 Qib 70 (feem ntau raug xaiv raws li ASME SA516 Qib 70) yog cov qib carbon steel tshwj xeeb tshwj xeeb tsim tshwj xeeb rau cov hlab ntsha siab thiab cov boilers ua haujlwm hauv nruab nrab mus rau qis dua. Nws yog khoom kim heev nyob rau hauv kev lag luam fabrication rau nws tshwj xeeb weldability, siab tensile zog, thiab notch toughness.
Qhov txawv ntawm A516 GR 70 thiab A515 GR 70 yog dab tsi?
SA-516-70 yog carbon steel phaj specification rau nruab nrab thiab qis kub kev pab cuam. SA515 GR 70 yog cov pa roj carbon- silicon steel phaj rau nruab nrab lossis siab dua qhov kev pabcuam kub. Qhov siab tshaj plaws thickness: SA-516-70 muaj qhov siab tshaj plaws thickness ntawm 204 hli, thaum SA515-GR-70 muaj qhov siab tshaj plaws thickness ntawm 200 hli.
A516 gr70 sib npaug li cas?
P355GH
ASTM A516 Qib 70 yog lub boiler / siab lub nkoj zoo ntawm steel phaj siv rau hauv cov kev pabcuam qis rau nruab nrab. Nws tau txhim kho qhov kev sib tw toughness. A516 GD70 steel phaj yog sib npaug rauP355GH thiab 490B qib.
Dab tsi yog qhov txawv ntawm ASTM A516 GR 70 thiab A36
ASTM A516 Qib 70 thiab ASTM A36 ua cov hom phiaj sib txawv:A516-70yog lub nkoj tshwj xeeb siab carbon steel nrog lub zog siab thiab qis -kub toughness, thaumA36yog ntau yam, dav dav -lub hom phiaj me me steel siv feem ntau rau kev tsim kho.
