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A8 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of A8

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ASTM A8

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This page is mainly introduced the A8 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of A8,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Cold-Work Tool Steel

Steel Garde:A8
Type:Tool Die Steels
Country:USA
Standard:ASTM
Application:Cold-Work Tool Steel

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C	0.50	0.60
Si	0.75	1.10
Mn	0.20	0.50
P		0.030
S		0.030
Cr	4.75	5.50
Mo	1.15	1.65
V
W	1.00	1.50
Ni＋Cu		0.75

Mechanical Properties

Tensile strength	685～411	σb/MPa
Yield Strength	082	σ 0.2 ≥/MPa
Elongation	99	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	789～360	-
HRC	30	-

Physical Properties

Thermal expansion	13-63	e-6/K
Thermal conductivity	41-99	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	2080-1169	째C
Density	3847-9235	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)
A8 Tool Die Steels	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