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Q420q chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of Q420q

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GBT Q420q

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This page is mainly introduced the Q420q chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of Q420q,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Q420q

Steel Garde:Q420q
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

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	399～973	σb/MPa
Yield Strength	373	σ 0.2 ≥/MPa
Elongation	71	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	111～373	-
HRC	30	-

Physical Properties

Thermal expansion	82-31	e-6/K
Thermal conductivity	20-89	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	3596-1631	째C
Density	9690-6212	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)
Q420q 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