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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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GBT 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	585～653	σb/MPa
Yield Strength	819	σ 0.2 ≥/MPa
Elongation	74	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	355～760	-
HRC	30	-

Physical Properties

Thermal expansion	54-38	e-6/K
Thermal conductivity	94-68	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	7942-4758	째C
Density	6000-7944	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