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A4 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of A4

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ASTM A4

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This page is mainly introduced the A4 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of A4,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
A4

Steel Garde:A4
Type:Special Alloy
Country:USA
Standard:ASTM
Application:Alloy tool steel

Relevant products:

Steel of Turbine...

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
A40	JIS	Japan
ISO A4	ISO	ISO
A4	STAS/SR	Romania
A40	STAS/SR	Romania
HA4N	AS	Australia
CA4	AS	Australia
HA400	AS	Australia
SMA400AW	CNS	China
SMA400BW	CNS	China
SMA400CW	CNS	China
SMA400AP	CNS	China
SMA400BP	CNS	China
SMA400CP	CNS	China
SMA490AW	CNS	China
SMA490BW	CNS	China
SMA490CW	CNS	China
SMA490AP	CNS	China
SMA490BP	CNS	China
SMA490CP	CNS	China

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	539～768	σb/MPa
Yield Strength	878	σ 0.2 ≥/MPa
Elongation	64	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	361～231	-
HRC	30	-

Physical Properties

Thermal expansion	12-07	e-6/K
Thermal conductivity	58-72	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	0956-7658	째C
Density	6605-7695	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)
A4 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