Sichualo Hoflu Tshwj xeeb Steel tuam txhab yog ib qho ntawm cov neeg tsim khoom lag luam thiab cov neeg muab khoom ntawm SAE 4340 hlau Alloy Alloy Bar cov chaw nyob hauv Suav teb. Nrog ntau tshaj 20 xyoo kev paub, peb lub Hoobkas muaj cov khoom lag luam zoo hauv Suav teb nrog cov nqi sib tw. Txais tos tiv tauj peb rau kev pabcuam lag luam wholesale.
AISI 4340 steel yog cov pa roj carbon monloy, cov roj steel tsawg uas paub txog nws cov ntu muaj zog thiab muaj zog hauv cov tshooj loj. AISI 4340 kuj yog ib hom Nickel chromium molybdenum hlau yog feem ntau muab cov hlau tawv thiab npau taws heev ntawm 930 - 1080 MPa.
Vim tias muaj cov ASTM 4340 qib steel yog feem ntau hloov nrog European raws cov qauv 817m40 / EN24 / 36 raws SNCM439 hlau. Koj muaj cov ncauj lus kom ntxaws ntawm 4340 steel hauv qab no:
SAE 4340 Alloy Steel Bar Rau Automotive Raug Tsheb
1. AISI ALOY 4340 HLAU LAWV
4340 STEEL ROUND: INCH 8mm - 3000mm (Dia Dia30-240 hli hauv Tshuag hauv Annealed mob, xa khoom xa tuaj tam sim ntawd)
4340 steel phaj: thickness 10mm - 1500mm X Dav 200mm - 3000mm
4340 Hlau qib xwm txheej: 20mm - 500mm
Deg tas: Dub, ntxhib machined, tig los yog ua ib qho kev xav tau
2. AISI 4340 STEEL SPECATION THIAB COV LUS QHIA
| Lub teb chaws | Usa | Tus tub rog Askiv | Tus tub rog Askiv | Nyiaj txiag |
| Lub hom phiaj | ASTM A29 | Rau 10250 | BS 970 | JIS G4103 |
| Cov menyuam kawm qib | 4340 | 36cnimo4 / 1.6511 |
EN24 / 817M40 | SNCM 439 / SNCM8 |
3. Astm 4340 tus hlau thiab equilvalents chemical tshuaj
| Lub hom phiaj | Teem nqi | C | Mn | P | S | Si | Ni | Cr | Mo |
| ASTM A29 | 4340 | 0.38-0.43 | 0.60-0.80 | 0.035 | 0.040 | 0.15-0.35 | 1.65-2.00 | 0.70-0.90 | 0.20-0.30 |
| Rau 10250 | 36cnimo4 / 1.6511 |
0.32-0.40 | 0.50-0.80 | 0.035 | 0.035 | Tsawg dua los yog sib npaug rau 0.40 | 0.90-1.20 | 0.90-1.2 | 0.15-0.30 |
| BS 970 | EN24 / 817M40 | 0.36-0.44 | 0.45-0.70 | 0.035 | 0.040 | 0.1-0.40 | 1.3-1.7 | 1.00-1.40 | 0.20-0.35 |
| JIS G4103 | SNCM 439 / SNCM8 | 0.36-0.43 | 0.60-0.90 | 0.030 | 0.030 | 0.15-0.35 | 1.60-2.00 | 0.60-1.00 | 0.15-0.30 |
4. AISI ALOY 4340 HLAU NEEG KHO TSHUAB
| Cov Khoom Siv Mechanical
(Kub kho mob) |
Yam tseem ceeb | Txoj Cai Cai lub hli |
Tensile Tuag MPA | Paib lub zog MPa |
Elong. % |
Izod cuam tshuam J |
Lub khawm Kev nyuaj |
| T | 250 | 850-1000 | 635 | 13 | 40 | 248-302 | |
| T | 150 | 850-1000 | 665 | 13 | 54 | 248-302 | |
| U | 100 | 930-1080 | 740 | 12 | 47 | 269-331 | |
| V | 63 | 1000-1150 | 835 | 12 | 47 | 293-352 | |
| W | 30 | 1080-1230 | 925 | 11 | 41 | 311-375 | |
| X | 30 | 1150-1300 | 1005 | 10 | 34 | 341-401 | |
| Y | 30 | 1230-1380 | 1080 | 10 | 24 | 363-429 | |
| Z | 30 | 1555- | 1125 | 5 | 10 | 444- | |
Thermal Khoom
| Cov Khoom Siv | Me me | Muaj huab tais |
| Thermal nthuav kev kub -}}}}}℃F, hnoos qeev F, hnoos qeev (1110℃f) Tauj | 12.3 μm / m degree | 6.83 μin / hauv Degree F |
| Thermal conductivity (cov hlau raug) | 44.5 W / MK | 309 BTU hauv / hr.ft². Degree F |
5. Forging ntawm 4340 Alloy Steel
Preheat tus hlau 4340 ua ntej, ua kom sov li mus txog 1150℃- 1200℃siab tshaj plaws rau forging, tuav kom txog thaum qhov kub yog ib yam tsis muaj zog thoob plaws.
Tsis txhob ua yeeb yam hauv qab 850℃. 4340}} muaj kev zam txim zoo tab sis kev saib xyuas kom txias thaum cov hlau ua rau tawg. Tom qab kev ua haujlwm forging cov haujlwm ua haujlwm yuav tsum txias kom txias li sai tau. Thiab cua txias rau hauv cov xuab zeb lossis qhuav qaub yog pom zoo thiab lwm yam.
6. AISI 4340 HLAU LENG KUB KUB KEV KHO MOB
Kev ntxhov siab tau txais kev ntxhov siab
Rau ua ntej - Hardened Steel ntxhov siab tau txais los ntawm cov hlau kub 4340 rau ntawm 500 txog 550 degree. Ua kom sov mus rau 600℃- 650 degree, tuav kom txog thaum kub yog niaj hnub niaj hnub kub niaj hnub thoob plaws ntawm ntu, soak rau 1 hli ntu, thiab txias hauv cov huab cua tseem.
Ib tug anerting
Ib daim ntawv qhia Anneal tag nrho tuaj yeem ua tiav ntawm 844℃(1550 f) ua raws li kev tswj hwm (rauv) txias ntawm tus nqi tsis nrawm dua li 10℃(600 f). Los ntawm 315℃600 f nws yuav yog huab cua txias.
Npau taws
AISI 4340 Alloy Steel yuav tsum yog nyob rau hauv cov cua sov kho lossis ua kom zoo nkauj thiab kub kho ua ntej npau taws. Qhov kub siab rau nyob ntawm cov qib siab xav tau. Rau cov qib siab muaj zog hauv 260 - 280 KSI ntau qhov kev kub ntxhov ntawm 232℃(450 f). Rau lub zog hauv 125 - ksi ntau temper ntawm 510℃(950 f). Thiab tsis txhob npau taws rau 4340 yog tias nws yog nyob rau hauv 220 - 260 ksi zog ntau yam raws li kev cuam tshuam ntawm kev cuam tshuam rau qib no ntawm lub zog.
Yuav tsum zam kev zam yog tias ua tau nyob rau hauv thaj tsam 250℃- 450℃vim npau taws xob brittleness
Cim npe nrov: SAE 4340 steel alloy bar muab khoom, Tuam Tshoj, tuam ntxhab, cov chaw muag khoom, Hoobkas