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China YB 18A 航空空心铆钉用18A薄壁无缝钢管规范 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 18A / 18A
Category Grade Standard Region/Area Standard Content
Metals 18A YB/T 679 China 航空空心铆钉用18A薄壁无缝钢管规范

Chemical composition(mass fraction)(wt.%) of the 18A

Element Min Max Similar
Cu - 0.2500 -
Ni - 0.3000 -
Cr - 0.3000 -
Mn 0.3500 0.6500 -
Si 0.1700 0.3700 -
C 0.1500 0.2200 -

Mechanical Properties of steel grade 18A

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)
825 (≥) 979 (≥) 34 14 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 231

Physical Properties of steel grade 18A

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
13 - -     0.33 -  
491 753 - 21.3 214   -  
395 - 44 24.2   221 143

Heat Treatment of steel grade 18A

Heat treated : 1175°C - 1916°C

Technological Curves of steel grade 18A

Cross Reference Table (Equivalent Grade) of 18A

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