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

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

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

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
40CrMnMo7	DIN	Germany
40CrMnMoS8-6	DIN	Germany
40CrMnNiMo8-6-4	DIN	Germany
40CrMnMo8	AFNOR	France
40CrMnMo8	AFNOR	France
40CrMnNiMo8-6-4①	ISO	ISO
40CrMnNiMo8-6-4①	ISO	ISO
S40CrMnlSil	STAS/SR	Romania
40CrMnMo7	UNE	Spain
40CrMnMo	GBT	China
EN 40CrMnNiMo8-6-4	EN	Euronorm

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	470～673	σb/MPa
Yield Strength	578	σ 0.2 ≥/MPa
Elongation	40	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	944～813	-
HRC	30	-

Physical Properties

Thermal expansion	25-58	e-6/K
Thermal conductivity	38-25	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	4486-4792	째C
Density	1966-1149	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)
40CrMn 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