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Type II

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Type I 50Cr-50Ni
#Type #II

Description

USA ASTM Type II Steel Castings, Chromium-Nickel-Iron Alloy (25-12 Class),for High-Temperature Service and Type II Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: Type II
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy Type II ASTM USA Steel Castings, Chromium-Nickel-Iron Alloy (25-12 Class),for High-Temperature Service
J94203
J94204
J94603
WCA
WCB
WCC
J02502
J03002
J02503
Type I

Chemical composition(mass fraction)(wt.%) of the Type II

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Mo(％)
0.20-0.45 ≤1.75 ≤2.5 ≤0.05 ≤0.05 23.0-28.0 10.0-14.0 ≤0.2

Mechanical Properties of steel grade Type II

Yield
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV/Ku (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
773 (≥) 228 (≥) 42 14 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 242

Physical Properties of steel grade Type II

Temperature
(°C)		 Modulus of elasticity
(GPa)		 Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)		 Specific thermal capacity
(J/kg·°C)		 Specific electrical resistivity
(Ω mm²/m)		 Density
(kg/dm³)		 Poisson’s coefficient, ν
43 - -     0.14 -  
634 232 - 33.3 312   -  
919 - 43 41.2   134 214

Heat Treatment of steel grade Type II

Heat treated : 1554°C - 1819°C

Technological Curves of steel grade Type II

Cross Reference Table (Equivalent Grade) of Type II

Grade Standard Country Application
Type410S UNS USA Martensitic special steel
Type410S UNS USA Martensitic special steel
Type410Cb(XM-30) UNS USA Martensitic special steel
Type410Cb(XM-30) UNS USA Martensitic special steel
Type418(GreekAscollOy) UNS USA
Type418(GreekAscollOy) UNS USA
S42023 UNS USA Martensitic special steel
S42023 UNS USA Martensitic special steel
Type420FSe UNS USA Martensitic special steel
Type420FSe UNS USA Martensitic special steel
Type440F UNS USA Martensitic special steel
Type440F UNS USA Martensitic special steel
PH15-7MO(Type632) UNS USA Martensitic special steel
PH15-7MO(Type632) UNS USA Martensitic special steel
AM-350(Type633) UNS USA precipitation hardening
AM-350(Type633) UNS USA precipitation hardening
AM-350(Type633) UNS USA precipitation hardening
AM-350(Type633) UNS USA precipitation hardening
AM-355(Type634) UNS USA precipitation hardening
AM-355(Type634) UNS USA precipitation hardening
Type I 50Cr-50Ni
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