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70Mn chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 70Mn

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GBT 70Mn

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This page is mainly introduced the 70Mn chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 70Mn,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
70Mn

Steel Garde:70Mn
Type:Special Alloy
Country:China
Standard:GBT
Application:China structural steel and alloy steel

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
EN 70MnMoCr8	EN	Euronorm

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	621～745	σb/MPa
Yield Strength	209	σ 0.2 ≥/MPa
Elongation	91	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	104～345	-
HRC	30	-

Physical Properties

Thermal expansion	16-18	e-6/K
Thermal conductivity	03-93	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	6593-1902	째C
Density	3964-3728	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)
70Mn 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