|
gptkbp:instanceOf
|
aluminum alloy
|
|
gptkbp:alsoKnownAs
|
Alloy Steel 4340
SAE 4340
UNS G43400
|
|
gptkbp:application
|
gptkb:aircraft
axles
crankshafts
high-strength bolts
power transmission gears
|
|
gptkbp:carbonContent
|
0.38-0.43%
|
|
gptkbp:chromiumContent
|
0.70-0.90%
|
|
gptkbp:containsElement
|
gptkb:phosphorus
gptkb:sulfur
carbon
iron
nickel
manganese
silicon
molybdenum
chromium
|
|
gptkbp:corrosionResistance
|
low
|
|
gptkbp:countryOfOrigin
|
gptkb:United_States
|
|
gptkbp:density
|
7.85 g/cm³
|
|
gptkbp:elongation
|
11-25%
|
|
gptkbp:formability
|
good
|
|
gptkbp:hardness
|
217-235 HB (annealed)
up to 53 HRC (quenched and tempered)
|
|
gptkbp:heatTreatment
|
can be heat treated to high strength
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
AISI 4340
|
|
gptkbp:machinability
|
good
|
|
gptkbp:magnetType
|
yes
|
|
gptkbp:manganeseContent
|
0.60-0.80%
|
|
gptkbp:meltingPoint
|
1427-1515°C
|
|
gptkbp:microstructure
|
martensitic (after quenching)
|
|
gptkbp:molybdenumContent
|
0.20-0.30%
|
|
gptkbp:nickelContent
|
1.65-2.00%
|
|
gptkbp:phosphorusContent
|
max 0.035%
|
|
gptkbp:quenchingMedium
|
gptkb:oil
|
|
gptkbp:siliconContent
|
0.15-0.30%
|
|
gptkbp:standardizedBy
|
gptkb:American_Iron_and_Steel_Institute
|
|
gptkbp:sulfurContent
|
max 0.040%
|
|
gptkbp:temperingTemperature
|
400-650°C
|
|
gptkbp:tensileStrength
|
745-1860 MPa
|
|
gptkbp:usedIn
|
gptkb:military
aerospace industry
automotive industry
|
|
gptkbp:weldability
|
gptkb:fire
|
|
gptkbp:yield
|
470-1620 MPa
|
|
gptkbp:bfsParent
|
gptkb:AISI_steel_grades
|
|
gptkbp:bfsLayer
|
7
|