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Q390 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of Q390

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GBT Q390

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This page is mainly introduced the Q390 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of Q390,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Q390

Steel Garde:Q390
Type:Special Alloy
Country:China
Standard:GBT
Application:China structural steel and alloy steel

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
Q390	GBT	China
Q390	GBT	China
Q390	GBT	China
Q390	GBT	China
Q390GNH	GBT	China

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	020～637	σb/MPa
Yield Strength	761	σ 0.2 ≥/MPa
Elongation	98	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	623～979	-
HRC	30	-

Physical Properties

Thermal expansion	43-15	e-6/K
Thermal conductivity	38-77	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	2000-3882	째C
Density	3845-9088	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)
Q390 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