K21604 Stainless Steels

K21604 - Specification & Application

Alloy steel casting

Chemical composition(wt.%) of K21604 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.08
Si - 1.00
Mn 7.50 9.00
P - -
S - -
Ni 5.00 7.00
Cr 17.50 22.00
Al - -
Cu - -
Ti - -
Fe - -
N 0.25 0.50
Mo 2.00 3.00

K21604 - Detail

Alloy steel casting

Mechanical properties of grade K21604

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)
425 (≥) 694 (≥) 13 44 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 121

Physical properties of grade K21604

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
475 (≥) 675 (≥) 31 23 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 142
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
368 934 594
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