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

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UNS NV7(4140)

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

Steel Garde:NV7(4140)
Type:Stainless Steels
Country:USA
Standard:UNS
Application:Steel for intake valves

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
H41400	AISI	USA
HNV7(71360)	UNS	USA
A 276 S41400	SAE	USA
A 314 S41400	SAE	USA
A 473 S41400	SAE	USA
A 580 S41400	SAE	USA
S41400	AISI	USA

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C	0.37	0.44
Si	0.15	0.35
Mn	0.65	1.10
P		0.035
S		0.04
Cr	0.75	1.20
Mo	0.15	0.25

Mechanical Properties

Tensile strength	385～677	σb/MPa
Yield Strength	778	σ 0.2 ≥/MPa
Elongation	54	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	216～234	-
HRC	30	-

Physical Properties

Thermal expansion	36-00	e-6/K
Thermal conductivity	50-73	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	7847-1497	째C
Density	0308-4871	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)
NV7(4140) Stainless Steels	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