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45B chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 45B

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GBT 45B

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This page is mainly introduced the 45B chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 45B,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
45B

Steel Garde:45B
Type:Special Alloy
Country:China
Standard:GBT
Application:China structural steel and alloy steel

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	347～386	σb/MPa
Yield Strength	935	σ 0.2 ≥/MPa
Elongation	05	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	609～587	-
HRC	30	-

Physical Properties

Thermal expansion	99-08	e-6/K
Thermal conductivity	50-60	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	2630-1974	째C
Density	1494-5299	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)
45B 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