ISO H3 Stainless Steels to ISO 4955

ISO H3 - Specification & Application

  • ISO 4955 - Heat-resistant steels
  • ISO 15510 (2010) - Stainless steels -- Chemical composition

Heat-resistant steels

Chemical composition(wt.%) of ISO H3 grade: to ISO 4955

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.12
Si 0.70 1.40
Mn - 1.00
P - 0.040
S - 0.030
Cr 12.00 14.00
Ni - 1.00
Al 0.70 1.20

ISO H3 - Detail

Heat-resistant steels

Mechanical properties of grade ISO H3 ISO 4955

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)
197 (≥) 458 (≥) 31 11 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 322

Physical properties of grade ISO H3 ISO 4955

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
814 (≥) 532 (≥) 34 13 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 122
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
866 622 569

Equivalent Grade

Equivalent Products

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