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A20404 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of A20404

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This page is mainly introduced the A20404 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of A20404,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
A20404

Steel Garde:A20404
Type:Special Alloy
Country:China
Standard:GBT
Application:China structural steel and alloy steel

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	695～721	σb/MPa
Yield Strength	649	σ 0.2 ≥/MPa
Elongation	95	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	095～332	-
HRC	30	-

Physical Properties

Thermal expansion	38-73	e-6/K
Thermal conductivity	79-86	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	0933-2634	째C
Density	0715-0040	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)
A20404 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