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A7 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of A7

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ASTM A7

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This page is mainly introduced the A7 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of A7,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
A7

Steel Garde:A7
Type:Special Alloy
Country:USA
Standard:ASTM
Application:Alloy tool steel

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
CA70T	AS	Australia
A70204	GBT	China
A70284	GBT	China
A70354	GBT	China
A71145	GBT	China
A71204	GBT	China
A71354	GBT	China
A74204	GBT	China
A73154	GBT	China
A73204	GBT	China

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	464～709	σb/MPa
Yield Strength	700	σ 0.2 ≥/MPa
Elongation	75	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	560～767	-
HRC	30	-

Physical Properties

Thermal expansion	28-00	e-6/K
Thermal conductivity	36-42	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	8869-8362	째C
Density	3087-7186	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)
A7 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