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K438 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of K438

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GBT K438

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This page is mainly introduced the K438 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of K438,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
K438

Steel Garde:K438
Type:Special Alloy
Country:China
Standard:GBT
Application:Age hardening type Nickel base alloy

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	042～639	σb/MPa
Yield Strength	807	σ 0.2 ≥/MPa
Elongation	48	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	496～893	-
HRC	30	-

Physical Properties

Thermal expansion	56-82	e-6/K
Thermal conductivity	86-41	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	1287-5678	째C
Density	9122-1109	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)
K438 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