ASTM A514 Qib Fyog qhov siab - tawm los, quenched thiab tempered alloy steel phaj feem ntau yog siv rau cov qauv siv uas qhov hnyav txuag thiab siab zog yog qhov tseem ceeb. Nws yog ib feem ntawm tsev neeg ntawm cov hlau feem ntau raug xa mus los ntawm lub npe lag luam T-1 steel.
Cov ntsiab lus tseem ceeb
Yield Strength: Yam tsawg kawg 100 ksi (kwv yees . 690 MPa) rau thicknesses txog 2.5 ntiv tes.
Tensile Strength: Feem ntau 110-130 ksi.
Qhov xwm txheej: Muab xa mus rau hauv lub xeev quenched thiab tempered kom ua tiav nws siab - lub zog thiab cov khoom siv tawv tawv.
Thickness Range: Cov qauv muaj rau Qib F yog feem ntau mus txog 2.5 nti (63.5 mm).
Qhov ze tshaj plaws thiab feem ntau lees txais European sib npaug rau ASTM A514 Qib F yog EN 10025-6: 2019 qib S690QL1 (los yog S690Q / QL / QL1).
Nov yog cov ncauj lus kom ntxaws txog qhov sib npaug thiab qhov sib txawv tseem ceeb:
Kev sib piv ncaj qha
| Khoom | A514 Qib F (ASTM A514) | Qhov sib npaug European: S690QL1 (EN 10025-6) |
|---|---|---|
| Yam tsawg kawg Yield Strength (ReH) | 690 MPa (txog 31.75 hli) | 690 MPa (txog 30 hli) |
| Tensile zog (Rm) | 760 - 895 MPa | 770 - 940 MPa |
| Kev Xa Khoom | Quenched & Tempered | Quenched & Tempered (raws li "Q") |
| Impact Toughness | Charpy V-notch, min. tus nqi @ -46℃(-50℃F) | Charpy V-notch, min. tus nqi @ -60℃(rau QL1) |
| Lub Hom Phiaj | Lub zog siab nrog txhim kho weldability (qis CE) | Siab -lub zog weldable structural steel |
Vim li cas S690QL1 yog qhov zoo tshaj plaws Match:
Lub zog: "690" qhia txog 690 MPa yam tsawg kawg nkaus lub zog, uas yog qhov sib tw ncaj qha rau Qib F.
Txheej Txheem: "Q" lees tias nws yog quenched thiab tempered.
Toughness: "L1" sub-qib ua kom muaj kev cuam tshuam kev sim ntawm -60 degree, uas zoo sib xws nrog Qib F qhov nruj -50℃F (-46 degree) yuav tsum tau ua. Standard S690QL (kuaj ntawm -40 degree) tej zaum yuav tsis tau raws li qhov toughness specification.
Kev txiav txim siab tseem ceeb & Caveats
Tsis yog "Trop-hauv" Hloov: Txawm tias muaj qhov sib xws, lawv tau tswj hwm los ntawm cov qauv sib txawv (ASTM vs. EN). Kev hloov pauv yuav tsum muaj kev pom zoo raws li txoj cai tsim nyog (xws li Eurocode 3 vs. AISC).
Chemical Composition: Cov tshuab hlau sib txawv. A514 Qib F siv qhov tshwj xeeb Cr-Mo tshuav nyiaj li cas (tsis muaj boron), thaum S690QL1 feem ntau siv Mn-Ni-Mo-B system. Qhov no ua rau muaj qhov sib txawv ntawm cov pa roj carbon sib npaug (CEV / Pcm), cuam tshuam rau cov txheej txheem vuam.
Kev Siv Lub Nkoj Siab: Yog tias A514 Qib F yog rau daim ntawv thov lub nkoj siab, qhov kev ua haujlwm ze dua nyob hauv Europe yuav yog P690QH raws li EN 10028-6 (siab hlab ntsha steel phaj).
Daim ntawv pov thawj: Thaum yuav khoom S690QL1 raws li qhov sib npaug, koj yuav tsum qhia meej meej txog qhov yuav tsum tau ua kom tawv nqaij sub-qib (L1) thiab thickness ntau los xyuas kom meej ua raws.
Cov lus pom zoo
Rau kev tsim qauv hloov ntawm A514 Qib F rau European steel:
Qhia meej S690QL1 kom phim ob lub zog thiab qis -kub toughness.
Re- tsim nyog rau tag nrho cov txheej txheem vuam siv tsim nyog EN- cov khoom siv ua raws (xws li EN ISO 16834-A).
Muaj qhov hloov pauv tau tshuaj xyuas thiab pom zoo los ntawm tus kws tsim qauv tsim lub luag haujlwm, ceeb toom txog kev hloov pauv ntawm tus qauv thiab cov khoom siv.
Hauv cov ntsiab lus, thawj qhov sib npaug European yog S690QL1, tab sis kev hloov pauv tau zoo yuav tsum tau ua tib zoo saib xyuas cov qib toughness, cov txheej txheem vuam, thiab kev tswj hwm cov cai tsim.
1. Dab tsi yog A514 Qib F steel siv rau?
A514 Qib F feem ntau yog siv rau hauv siab - muaj zog cov qauv siv xws li cov khoom siv hnyav, crane booms, mining machinery, thiab txuas hniav uas yuav tsum muaj lub zog zoo tshaj - rau - qhov hnyav piv.
2. Lub zog tawm ntawm A514 Qib F yog dab tsi?
Rau cov phaj siab txog 1.25 ntiv tes (31.75 hli) tuab, qhov tsawg kawg nkaus lub zog yog 100 ksi (690 MPa). Rau cov phaj tuab, lub zog tawm los txo qis, feem ntau mus txog 90 ksi (620 MPa) txog 2.5 ntiv tes.
3. A514 Qib F puas tuaj yeem welded?
Yog lawm, nws tuaj yeem welded, tab sis nws yuav tsum muaj cov txheej txheem nruj xws li preheating, siv qis -hydrogen electrodes, thiab feem ntau tshaj tawm -weld tshav kub kho kom tsis txhob tawg vim nws cov hardenability siab.
4. A514 Qib F txawv li qib E li cas?
Qhov sib txawv tseem ceeb yog nyob rau hauv chemistry: Qib F muaj qis carbon thiab alloy cov ntsiab lus (thiab tsis muaj boron), uas ua rau weldability zoo dua thiab qis dua carbon sib npaug, thaum ob qib muab tib yam tsawg kawg nkaus yield zog.
5. Lub hardness ntawm A514 Qib F yog dab tsi?
Lub hardness ntau yam rau A514 Qib F yog kwv yees li HBW 280-340 (Brinell) lossis HRC 29-36, tab sis hardness tsis yog cov cuab yeej teev hauv ASTM tus qauv.
6. Puas yog A514 Qib F zoo ib yam li T1 steel?
Yog lawm, A514 Qib F feem ntau raug xa mus rau "T1 Hom F" lossis "hloov T1." Lub npe "T1" Ameslikas los ntawm cov cim lag luam, tab sis feem ntau nws yog siv rau tsev neeg ntawm siab - lub zog, quenched thiab tempered steels.
7. Cov European sib npaug ntawm A514 Qib F yog dab tsi?
Qhov sib npaug European ze tshaj plaws yog S690QL lossis S690Q / QL1 raws li EN 10025-6, uas muaj qhov zoo sib xws 690 MPa yield zog thiab quenched & tempered mob.
8. Koj puas tuaj yeem nplaim hluav taws txiav A514 Qib F?
Yog lawm, tab sis nws yuav tsum tau ua kom sov (feem ntau 300-500℃F) thiab tswj kom txias kom tsis txhob tawv thiab tawg ntawm ntug txiav. Plasma lossis waterjet txiav yog feem ntau nyiam lwm txoj hauv kev.
9. Cov tshuaj muaj pes tsawg leeg ntawm A514 Qib F yog dab tsi?
Nws muaj cov ntsiab lus qis dua (max 0.20%) piv rau Qib E, nrog rau kev txo qis ntawm chromium, molybdenum, thiab tsis muaj boron, uas ua rau qis carbon sib npaug rau kev txhim kho weldability.
10. Vim li cas thiaj xaiv A514 Qib F dhau qib E?
Xaiv Qib F thaum weldability thiab fabrication yooj yim yog qhov tseem ceeb tshaj plaws rau cov qauv complex, raws li nws cov leaner chemistry txo qhov kev pheej hmoo ntawm vuam -txog tawg piv rau qib siab dua - alloy Qib E.
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.
