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SAE NV7(4140) chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SAE NV7(4140)

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SAE SAE NV7(4140)

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This page is mainly introduced the SAE NV7(4140) chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SAE NV7(4140),such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
SAE NV7(4140)

Steel Garde:SAE NV7(4140)
Type:Special Alloy
Country:USA
Standard:SAE
Application:precipitation hardening

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
SAE NVl(1541)	SAE	USA
SAE NV2(1547)	SAE	USA
SAE NV3	SAE	USA
SAE NV4(3140)	SAE	USA
SAE NV5(8645)	SAE	USA
SAE NV6(5150)	SAE	USA
SAE NV8		USA
SAE NV9	SAE	USA
SAE HNVl	SAE	USA
SAE HNV2	SAE	USA
SAE HNV3	SAE	USA
SAE HNV4	SAE	USA
SAE HNV5	SAE	USA
SAE HNV6	SAE	USA
SAE HNV7(71360)	SAE	USA
SAE HNV8	SAE	USA
SAE EVl	SAE	USA
SAE EV2	SAE	USA
SAE EV3	SAE	USA
SAE EV4	SAE	USA
SAE EV5	SAE	USA
SAE EV6	SAE	USA
SAE EV7	SAE	USA
SAE EV8	SAE	USA
SAE EV9	SAE	USA
SAE EVl0	SAE	USA
SAE EVll	SAE	USA
SAE EVl2	SAE	USA
SAE EVl3	SAE	USA
SAE EVl4	SAE	USA
SAE EVl5	SAE	USA
SAE EVl6	SAE	USA
SAE EVl7	SAE	USA
SAE HEVl	SAE	USA
SAE HEV2	SAE	USA
SAE HEV3	SAE	USA
SAE HEV6	SAE	USA
SAE HEV7	SAE	USA
SAE HEV8	SAE	USA

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	620～517	σb/MPa
Yield Strength	812	σ 0.2 ≥/MPa
Elongation	15	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	296～550	-
HRC	30	-

Physical Properties

Thermal expansion	21-85	e-6/K
Thermal conductivity	89-37	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	3794-2995	째C
Density	8547-0327	kg/m³
Resistivity	0.50-0.60	Ohm.mm²/m

Heat Treatment Regime

Annealing	Quenching	Tempering	Normalizing	Q & T
√	√	√	√	√

Size Availability

Steel Grade	Specification	Processing range(mm)
SAE NV7(4140) Special Alloy	Round Bar and Hollow Bar	Φ1 to Φ2000
	Square and Flat Steel	Φ10 to Φ100
	Plate and Sheet	0.08-800(Thickness)10-1500(Width)Length
	Tube or Pipe	OD:Φ4-410; WT:1-35 mm; Lenght:10-12000
	Coil and Strip Steel	THK:0.1mm Width:1500mm
	Forged	Ring/Cylindrical/Disk