Aluchrom 4 18 YHf Stainless Steels

Aluchrom 4 18 YHf - Specification & Application

Aluchrom 4 18 YHf

Chemical composition(wt.%) of Aluchrom 4 18 YHf grade:

Elements Min.(≥) Max.(≤) Similar Remarks
Ni - 0.5000
Cr 17.0000 19.0000
C - 0.0800
S - 0.0300
Mn - 0.5000
Si - 0.6000
Al 3.5000 5.0000
Y - 0.1500
Zr - 0.1500
Hf - 0.1500
P - 0.0400
Cu - 0.5000

Aluchrom 4 18 YHf - Detail

Aluchrom 4 18 YHf

Mechanical properties of grade Aluchrom 4 18 YHf

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)
498 (≥) 654 (≥) 44 31 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 442

Physical properties of grade Aluchrom 4 18 YHf

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
645 (≥) 687 (≥) 33 11 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 241
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
713 385 481
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