K31820 Stainless Steels

K31820 - Specification & Application

Alloy Steel (HY80)

Chemical composition(wt.%) of K31820 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.08
Si - 1.00
Mn - 2.00
P - 0.045
S - 0.03
Ni 13.00 15.00
Cr 17.00 19.00
Al - -
Cu - -
Ti - -
Fe - -
N - -
Mo 1.75 2.75
V - -

K31820 - Detail

Alloy Steel (HY80)

Mechanical properties of grade K31820

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)
674 (≥) 576 (≥) 44 12 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 443

Physical properties of grade K31820

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
559 (≥) 897 (≥) 22 32 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 441
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
788 392 362

Equivalent Products

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