2Cr25N Stainless Steels to GB 4238 (1992)

2Cr25N - Specification & Application

  • GB 4238 (1992) - Heat-resisting steel sheets and plates
  • GB/T 1221 (1992) - Heat-resisting steel bars

Heat-resisting steel sheets and plates

Chemical composition(wt.%) of 2Cr25N grade: to GB 4238 (1992)

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.20
Si - 1.00
Mn - 1.50
P - 0.04
S - 0.03
Cr 23.00 27.00
N - 0.25
Cu - 0.30

2Cr25N - Detail

2Cr25N

Mechanical properties of grade 2Cr25N GB 4238 (1992)

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)
448 (≥) 133 (≥) 42 23 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 211

Physical properties of grade 2Cr25N GB 4238 (1992)

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
589 (≥) 335 (≥) 14 33 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 224
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
379 411 939
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