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K20 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of K20

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JIS K20

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This page is mainly introduced the K20 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of K20,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
K20
Hardness quartile HRA: 89
Bending strength frequency/MPa: 1375

Steel Garde:K20
Type:Special Alloy
Country:Japan
Standard:JIS
Application:Carbide for cutting tools

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
ASTM CK20	AISI	USA

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	178～248	σb/MPa
Yield Strength	859	σ 0.2 ≥/MPa
Elongation	73	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	880～067	-
HRC	30	-

Physical Properties

Thermal expansion	21-87	e-6/K
Thermal conductivity	64-71	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	2603-8463	째C
Density	6789-2385	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)
K20 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