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1.7709 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 1.7709

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EN 1.7709

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This page is mainly introduced the 1.7709 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 1.7709,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties

Steel Garde:1.7709
Type:Structural Steel
Country:European
Standard:EN
Standard Number:

ITEM Standard Number Descriptions

1 EN 10269-1999 Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties
Application:high temperature boiler steels for energy industries

ITEM	Standard Number	Descriptions
1	EN 10269-1999	Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties

Relevant products:

21CMoV5-7,1.7709,2...

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
21CMoV5-7	DIN	Germany
21CMoV5-7	EN	European
21CrMoV5-7, 1.7709, 21CrMoV5-11, 1.8070	DIN	Germany

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C	0.17	0.25
Mn	0.40	0.80
Si		0.40
P		0.030
S		0.030
Cr	1.20	1.50
Ni		0.60
Mo	0.55	0.80
V	0.25	0.35
Al		0.03

Mechanical Properties

Tensile strength	878～727	σb/MPa
Yield Strength	077	σ 0.2 ≥/MPa
Elongation	44	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	701～524	-
HRC	30	-

Physical Properties

Thermal expansion	26-11	e-6/K
Thermal conductivity	38-20	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	1609-4782	째C
Density	5255-7093	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)
1.7709 Structural Steel	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