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

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AS 4140H

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

Steel Garde:4140H
Type:Special Alloy
Country:Australia
Standard:AS
Application:Australia Structural steel

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	878～994	σb/MPa
Yield Strength	094	σ 0.2 ≥/MPa
Elongation	88	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	771～908	-
HRC	30	-

Physical Properties

Thermal expansion	21-25	e-6/K
Thermal conductivity	17-31	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	7145-3029	째C
Density	2537-1823	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)
4140H 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