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.
Ntsiab Specifications
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).
Cov khoom tseem ceeb ntawm ASTM A514 Qib F yog txhais los ntawm nws lub zog siab, toughness, weldability, thiab quenched & tempered microstructure. Hauv qab no yog cov txheej txheem kev puas tsuaj ntawm nws cov khoom tseem ceeb, tshuaj, thiab lub cev yam ntxwv.
1. Mechanical Properties (Raws li ASTM A514 / A514M)
Cov no yog qhov tsawg kawg nkaus qhov tseem ceeb uas txhais cov qib.
| Khoom | Tus nqi (tsawg dua lossis sib npaug li 1.25 nti. / 31.75 mm tuab) | Tus nqi (1.25 in. to 2.5 in. / 31.75-63.5 mm thickness) |
|---|---|---|
| Yield zog (0.2% Offset) | 100 ksi (690 MPa) | 90 ksi (620 MPa) |
| Tensile zog | 110 - 130 ksi (760 - 895 MPa) | 100 - 130 ksi (690 - 895 MPa) |
| Elongation (hauv 2 nti) | 18% min | 16% min |
| Charpy V-Ntch Impact Toughness | Feem ntau 20-25 ft-lb (27-34 J) min. @ -50 ° F (-46 ° C) | Tib yam yuav tsum muaj. |
| Hom Hardness (Tsis Qhia) | HBW 280-340 (kwv yees. HRC 29-36) | Tsawg me ntsis rau cov ntu tuab. |
2. Cov Khoom Siv Tshuaj Tseem Ceeb (Tswj / Max %)
Lub ntsiab lus ntawm Qib F yog nws "lean" alloy tsim rau weldability.
| Element | Cov ntsiab lus (Qhov Ntau Yam / Max) | Lub Hom Phiaj & Ceeb Toom |
|---|---|---|
| Cov pa roj carbon (C) | 0.15 - 0.20% (Max 0.23%) | Tsawg dua Qib E kom zoo dua weldability. |
| Manganese (Mn) | 0.80 - 1.10% | Txhim kho thiab hardenability. |
| Chromium (Cr) | 0.40 - 0.65% | Hardenability thiab lub zog. |
| Molybdenum (hli) | 0.15 - 0.25% | Enhances lub zog thiab temper resistance. |
| Boron (B) | 0.0005 - 0.005% (Feem ntau tsis ntxiv) | Qhov tseem ceeb sib txawv: Qib F feem ntau tsim tsis muaj Boron, tsis zoo li Qib E. |
| Silicon (Si) | 0.15 - 0.35% | Deoxidizer. |
| Carbon sib npaug (CEV / Pcm) | ~0.60 - 0.70 (IIW formula) | Tsawg dua Qib E, qhia tau hais tias zoo dua weldability thiab qis tawg rhiab heev. |
3. Lub cev & cov khoom siv dav dav
Kev mob: Muab nyob rau hauv Quenched & Tempered (Q&T) mob.
Ceev: ~ 0.284 lb/in³ (7.85 g/cm³).
Modulus ntawm Elasticity: ~ 29,000 ksi (200 GPa).
Poisson tus piv: ~ 0.29.
4. Kev ua tau zoo & Fabrication Properties
Weldability: Zoo (rau 100 ksi steel). Nws qhov sib npaug ntawm cov pa roj carbon tsawg ua rau nws ua rau nws muaj peev xwm ua tau zoo dua li qib E. Yuav tsum muaj cov txheej txheem hydrogen qis, preheat (feem ntau 300-500℃F), thiab tswj kom txias.
Machinability: Ncaj nraim rau nruab nrab. Yuav tsum muaj lub zog ntau dua thiab cov cuab yeej tsim nyog piv rau cov hlau me me.
Nplaim Txiav: Ua tau nrog nruj preheat (300-500℃F) thiab ua kom txias qeeb los tiv thaiv ntug tawv thiab tawg. Plasma lossis waterjet txiav yog nyiam dua.
Fatigue Strength: Zoo heev, vim qhov huv, homogeneous Q&T microstructure.
5. Cov ntawv thov tseem ceeb
Nws raug xaiv rau nws qhov zoo tshaj qhov sib npaug ntawm lub zog, qhov hnyav, thiab fabricability:
Siab -Strength Structural Welded Fabrications: Crane booms, excavator arms, mining equipment frames.
Critical Choj Cheebtsam (tshwj xeeb yog cov seem txav tau).
Siab -Rise Building Columns & Braces.
Cheebtsam qhov twg vuam complex ua rau Qib E heev txaus ntshai los yog kim.
Core Distinction los ntawm A514 Qib E
Qib F yog engineered los muab zoo tib yam mechanical zog (100/90 ksi) raws li Qib E tab sis nrog ib tug leaner alloy chemistry. Qhov no ua rau qis dua carbon sib npaug, zoo dua weldability, thiab txo hydrogen- ua rau muaj kev pheej hmoo tawg, ua rau nws yog qhov kev xaiv zoo tshaj plaws rau cov qauv niaj hnub, hnyav welded.
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.
