1.7709 Structural Steel to EN 10269-1999

1.7709 - Specification & Application

  • EN 10269-1999 - Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties

high temperature boiler steels for energy industries

Chemical composition(wt.%) of 1.7709 grade: to EN 10269-1999

Elements Min.(≥) Max.(≤) Similar Remarks
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

1.7709 - Detail

Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties

Mechanical properties of grade 1.7709 EN 10269-1999

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
898 (≥) 692 (≥) 34 22 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 313

Physical properties of grade 1.7709 EN 10269-1999

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
574 (≥) 156 (≥) 12 11 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 311
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
498 836 528
We can customize the production of 1.7709 grade, contact us for the best solution.
sales@specificsteel.com