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Q420 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of Q420

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GBT Q420

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This page is mainly introduced the Q420 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of Q420,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Q420

Steel Garde:Q420
Type:Special Alloy
Country:China
Standard:GBT
Application:China structural steel and alloy steel

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
Q420q	GBT	China
Q420q	GBT	China
Q420q	GBT	China
Q420	GBT	China
Q420	GBT	China
Q420	GBT	China
Q420	GBT	China
Q420	GBT	China
Q420	GBT	China
Q420	GBT	China

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	665～675	σb/MPa
Yield Strength	261	σ 0.2 ≥/MPa
Elongation	77	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	647～798	-
HRC	30	-

Physical Properties

Thermal expansion	44-86	e-6/K
Thermal conductivity	74-12	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	5798-3858	째C
Density	6260-2220	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)
Q420 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