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Q345q chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of Q345q

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This page is mainly introduced the Q345q chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of Q345q,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Q345q

Steel Garde:Q345q
Type:Special Alloy
Country:China
Standard:GBT
Application:China structural steel and alloy steel

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
Q345q E		China
Q345q C		China
Q345q	GBT	China
Q345q	GBT	China

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	849～632	σb/MPa
Yield Strength	538	σ 0.2 ≥/MPa
Elongation	63	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	812～753	-
HRC	30	-

Physical Properties

Thermal expansion	52-34	e-6/K
Thermal conductivity	92-68	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	7609-6337	째C
Density	0393-4067	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)
Q345q 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