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70Si7 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 70Si7

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DIN 70Si7

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This page is mainly introduced the 70Si7 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 70Si7,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Alloyed Si steel

Steel Garde:70Si7
Type:Tool Die Steels
Country:Germany
Standard:DIN
Application:Alloyed Si steel

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C	0.65	0.75
Si	1.50	1.80
Mn	0.60	0.80
P		0.030
S		0.030
Cr
Mo
V

Mechanical Properties

Tensile strength	750～272	σb/MPa
Yield Strength	340	σ 0.2 ≥/MPa
Elongation	77	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	698～623	-
HRC	30	-

Physical Properties

Thermal expansion	33-29	e-6/K
Thermal conductivity	74-23	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	3943-0351	째C
Density	9486-3756	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)
70Si7 Tool Die Steels	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