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China HB La-4 铸造高温合金选用原材料技术要求 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: La-4 / La-4
Category Grade Standard Region/Area Standard Content
Metals La-4 HB/Z 131 China 铸造高温合金选用原材料技术要求

Chemical composition(mass fraction)(wt.%) of the La-4

Element Min Max Similar
C - 0.0500 -
Al - 0.0700 -
Mg - 0.1000 -
Ca - 0.0300 -
Si - 0.0500 -
Fe - 0.3000 -
(Ce+Pr+Nd+Sm+Y)/RE - 1.0000 -
La/RE 99.0000 - -
RE 98.0000 - -

Mechanical Properties of steel grade La-4

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)
138 (≥) 744 (≥) 13 23 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 223

Physical Properties of steel grade La-4

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
32 - -     0.23 -  
412 576 - 43.3 421   -  
723 - 11 23.2   114 214

Heat Treatment of steel grade La-4

Heat treated : 1547°C - 1182°C

Technological Curves of steel grade La-4

Cross Reference Table (Equivalent Grade) of La-4

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