A514 txawv ntawm A517 Specs li cas?
ASTM A514 thiab ASTM A517 yog ob qho kev qhia tshwj xeeb rau siab - tawm los- lub zog, quenched thiab tempered alloy steels, nrog cov tshuaj zoo tib yam rau cov qib sib xws (A, B, E, F, H, P, Q).
Txawm li cas los xij, lawv tsis yog qhov tshwj xeeb zoo ib yam: A514 yog tsim los rau cov qauv siv (xws li, welded txuas hniav), ua raws li ASTM A6 cov cai, thaum A517 yog rau kev siv lub nkoj siab (piv txwv li, fusion-welded boilers), ua raws li ASTM A20 cov kev cai.
A517 qhia txog kev tiv thaiv kev nkag siab thiab ntev - lub sijhawm ruaj khov nyob rau hauv siab - qhov kub thiab txias, thaum A514 tseem ceeb tshaj qhov weldability thiab cov qauv kev ntseeg siab nyob rau hauv cov khoom hnyav.
Raws li cov chaw tsim khoom lag luam thiab xa tawm, Gangsteel tsim cov phiaj xwm ua raws li ob qho kev qhia tshwj xeeb, muab ASTM A514 / A514M steel phaj thiab sib npaug rau cov qauv lossis kev xav tau ntawm lub nkoj.
Kev sib piv tshuaj lom neeg
Cov tshuaj muaj pes tsawg leeg zoo ib yam rau cov qib sib xws ntawm A514 thiab A517. Hauv qab no yog ib lub rooj rau xaiv qib (tus nqi ntawm qhov hnyav %, qhov siab tshaj plaws tshwj tsis yog ntau yam teev; ntsuas kub):
|
Element |
Qib A (A514 / A517) |
Qib B (A514 / A517) |
Qib E (A514/A517) |
Qib F (A514/A517) |
Qib H (A514 / A517) |
Qib P (A514/A517) |
Qib Q (A514/A517) |
|---|---|---|---|---|---|---|---|
|
C |
0.15-0.21 |
0.12-0.21 |
0.12-0.20 |
0.10-0.20 |
0.12-0.21 |
0.12-0.21 |
0.14-0.21 |
|
Mn |
0.80-1.10 |
0.70-1.00 |
0.40-0.70 |
0.60-1.00 |
0.95-1.30 |
0.45-0.70 |
0.95-1.30 |
|
P (max) |
0.035 |
0.035 |
0.035 |
0.035 |
0.035 |
0.035 |
0.035 |
|
S (max) |
0.035 |
0.035 |
0.035 |
0.035 |
0.035 |
0.035 |
0.035 |
|
Si |
0.40-0.80 |
0.20-0.35 |
0.20-0.40 |
0.15-0.35 |
0.20-0.35 |
0.20-0.35 |
0.15-0.35 |
|
Ni |
- |
- |
- |
0.70-1.00 |
0.30-0.70 |
1.20-1.50 |
1.20-1.50 |
|
Cr |
0.50-0.80 |
0.40-0.65 |
1.40-2.00 |
0.40-0.65 |
0.40-0.65 |
0.85-1.20 |
1.00-1.50 |
|
Mo |
0.18-0.28 |
0.15-0.25 |
0.40-0.60 |
0.40-0.60 |
0.20-0.30 |
0.45-0.60 |
0.45-0.60 |
|
V |
- |
0.03-0.08 |
- |
0.03-0.08 |
0.03-0.08 |
- |
0.03-0.08 |
|
Ti |
- |
0.01-0.03 |
0.01-0.10 |
- |
- |
- |
- |
|
Zr |
0.05-0.15 |
- |
- |
- |
- |
- |
- |
|
Cu |
- |
- |
- |
0.15-0.50 |
- |
- |
- |
|
B |
0.0025 |
0.0005-0.005 |
0.001-0.005 |
0.0005-0.005 |
0.0005-0.005 |
0.001-0.005 |
0.001-0.005 |
Nco tseg: Dashes qhia tsis tas yuav tsum tau ua. A517 tej zaum yuav muaj kev txwv ntxiv ntawm cov ntsiab lus tsis tau teev tseg rau A20.
Mechanical Properties Sib piv
Cov khoom siv tshuab zoo sib xws, tab sis A517 muaj qhov yuav tsum muaj zog tensile siab dua (115-135 ksi vs . 110-130 ksi rau A514 feem ntau qib txog li 2.5" tuab). Cov khoom muaj zog yog zoo tib yam (100 ksi min. txog 2.5", 90 ksi rau 2.5-6 "ksi tus nqi hauv qab no):
|
Khoom / Thickness |
A514 (Txog 2.5 ") |
A517 (txog 2.5 ") |
A514 (>2.5 "mus rau 6") |
A517 (>2.5 "mus rau 6") |
|---|---|---|---|---|
|
Yield zog (min) |
100 / 690 |
100 / 690 |
90 / 620 |
90 / 620 |
|
Tensile zog |
110-130 / 760-895 |
115-135 / 795-930 |
100-130 / 690-895 |
105-135 / 725-930 |
|
Elongation (min,%) |
18 |
18 |
16 |
16 |
|
Brinell Hardness (HBW) |
235-293 |
235-293 |
235-293 |
235-293 |
A517 lub tensile siab dua yuav haum cov hlab ntsha siab dua.
Thickness thiab Delivery Specifications
Qhov siab tshaj plaws thicknesses zoo sib xws (piv txwv li, 6 "rau ntau qib), tab sis ntau lawm txwv txawv (xws li, A517 Qib Q mus txog 8", A514 Qib Q txog 6").
Kev kho cua sov thiab kuaj qhov sib txawv
Ob leeg yuav tsum tau quenching thiab tempering (austenitizing Ntau dua los yog sib npaug rau 1650℃F / 900 degree, tempering Ntau dua los yog sib npaug rau 1150℃F / 620℃). A517 yuav xav tau kev sim ntxiv rau kev siv lub nkoj siab. Ob leeg muaj kev cuam tshuam rau HAZ tawg thaum PWHT; pretesting pom zoo. Hardness (235-293 HBW) tuaj yeem hloov cov kev ntsuas tensile rau nyias daim hlau.
Daim ntawv thov
A514: Welded choj, vaj tse, cov khoom siv hauv av. A517: Fusion-welded boilers, siab hlab ntsha. Gangsteel cov phaj haum ob qho tib si nrog ntau yam ntau lawm.
1. Dab tsi yog qhov yuav tsum tau ua kom muaj zog toughness rau A514 Qib F?
A514 Qib F feem ntau yuav tsum muaj qhov tsawg kawg nkaus Charpy V-notch cuam tshuam lub zog ntawm 54 Joules (40 ft- lbs) ntawm -40℃(-40℃F), kom ntseeg tau cov pob txha zoo heev hauv qhov chaw txias thiab cov ntawv thov kev thauj khoom.
2. A514 Qib F daim hlau tuaj yeem txiav txim siab npaum li cas?
Nws yog feem ntau tsim nyob rau hauv thicknesses txog li 100 hli (4 nti) thaum tuav tag nrho los ntawm - thickness zog, tab sis qee lub mills tuaj yeem muab cov phaj tuab nrog cov khoom kho kom zoo.
3. Dab tsi muab cov hlau uas pom zoo rau vuam A514 Qib F?
Vuam yuav tsum muaj kev sib tw siab - zog, qis-hydrogen electrodes xws li E11018 lossis E12018 kev faib tawm, nrog nruj ua raws li preheat (300-400℃F) thiab interpass kub tswj los tiv thaiv hydrogen cracking.
4. Puas yog A514 Qib F xav tau tom qab-weld heat treatment (PWHT)?
Yog lawm, PWHT tau pom zoo rau feem ntau cov khoom siv welded los txo cov kev ntxhov siab uas seem thiab rov ua kom tawv nqaij hauv tshav kub- thaj tsam cuam tshuam, tshwj xeeb tshaj yog rau cov ntu tuab thiab cov pob qij txha nruj heev.
5. A514 Qib F puas tuaj yeem yog nplaim taws- txiav yam tsis muaj kev ceev faj tshwj xeeb?
Nplaim txiav yuav tsum tau preheating rau 200-300℃F ua ntej txiav los tiv thaiv hardening thiab micro-cracking raws ntug txiav, tshwj xeeb tshaj yog rau thicknesses saum 2 ntiv tes.
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.
