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Q345GNH chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of Q345GNH

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GBT Q345GNH

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This page is mainly introduced the Q345GNH chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of Q345GNH,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Q345GNH

Steel Garde:Q345GNH
Type:Special Alloy
Country:China
Standard:GBT
Application:China structural steel and alloy steel

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
Q345GNHL	GBT	China

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	729～416	σb/MPa
Yield Strength	380	σ 0.2 ≥/MPa
Elongation	24	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	721～955	-
HRC	30	-

Physical Properties

Thermal expansion	03-55	e-6/K
Thermal conductivity	53-62	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	3081-8170	째C
Density	8204-3536	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)
Q345GNH 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