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40MnB chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 40MnB

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GBT 40MnB

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This page is mainly introduced the 40MnB chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 40MnB,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
40MnB

Steel Garde:40MnB
Type:Special Alloy
Country:China
Standard:GBT
Application:China structural steel and alloy steel

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
40MnBH	GBT	China

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	385～251	σb/MPa
Yield Strength	390	σ 0.2 ≥/MPa
Elongation	20	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	831～718	-
HRC	30	-

Physical Properties

Thermal expansion	29-18	e-6/K
Thermal conductivity	08-22	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	5695-8665	째C
Density	4113-1205	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)
40MnB 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