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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	768～874	σb/MPa
Yield Strength	871	σ 0.2 ≥/MPa
Elongation	25	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	949～177	-
HRC	30	-

Physical Properties

Thermal expansion	99-18	e-6/K
Thermal conductivity	56-38	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	6321-1584	째C
Density	5554-2203	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