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G8 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of G8

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JIS G8

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This page is mainly introduced the G8 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of G8,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
G8
Hardness quartile HRA:83.5
Bending strength frequency/MPa:2600

Steel Garde:G8
Type:Special Alloy
Country:Japan
Standard:JIS
Application:Carbide for cutting tools

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
YG8A		China
G8	JIS	Japan
ASTM CG8M	AISI	USA

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	063～755	σb/MPa
Yield Strength	826	σ 0.2 ≥/MPa
Elongation	85	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	521～248	-
HRC	30	-

Physical Properties

Thermal expansion	83-84	e-6/K
Thermal conductivity	23-57	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	7674-8570	째C
Density	3331-5832	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)
G8 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