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China GB 55A Casting tin-lead solder and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 55A / 55A
Category Grade Standard Region/Area Standard Content
Metals 55A GB/T 8012 China Casting tin-lead solder

Chemical composition(mass fraction)(wt.%) of the 55A

Element Min Max Similar

Mechanical Properties of steel grade 55A

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)
919 (≥) 481 (≥) 41 13 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 442

Physical Properties of steel grade 55A

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 - -     0.21 -  
558 344 - 14.3 131   -  
374 - 22 31.2   343 133

Heat Treatment of steel grade 55A

Heat treated : 1433°C - 1511°C

Technological Curves of steel grade 55A

Cross Reference Table (Equivalent Grade) of 55A

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