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55Si2MnB chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 55Si2MnB

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GBT 55Si2MnB

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This page is mainly introduced the 55Si2MnB chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 55Si2MnB,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
55Si2MnB

Steel Garde:55Si2MnB
Type:Special Alloy
Country:China
Standard:GBT
Application:China structural steel and alloy steel

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	219～777	σb/MPa
Yield Strength	771	σ 0.2 ≥/MPa
Elongation	86	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	469～549	-
HRC	30	-

Physical Properties

Thermal expansion	90-99	e-6/K
Thermal conductivity	47-45	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	4193-6765	째C
Density	7420-8213	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)
55Si2MnB 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