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Bulgaria BDS 20GFTL Low alloyed steel castings. Designations and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 20GFTL / 20 GFTL
Category Grade Standard Region/Area Standard Content
Metals 20 GFTL BDS 6550 Bulgaria Low alloyed steel castings. Designations

Chemical composition(mass fraction)(wt.%) of the 20 GFTL

Element Min Max Similar
V 0.0600 0.1500 -
Ti - 0.0500 -
Si 0.2000 0.5000 -
S - 0.0500 -
P - 0.0500 -
Ni - 0.3000 -
Mn 0.9000 1.4000 -
Cu - 0.3000 -
Cr - 0.3000 -
C 0.1600 0.2500 -

Mechanical Properties of steel grade 20 GFTL

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)
457 (≥) 755 (≥) 23 21 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 221

Physical Properties of steel grade 20 GFTL

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
42 - -     0.11 -  
525 891 - 13.3 111   -  
541 - 12 34.2   231 323

Heat Treatment of steel grade 20 GFTL

Heat treated : 1817°C - 1348°C

Technological Curves of steel grade 20 GFTL

Cross Reference Table (Equivalent Grade) of 20 GFTL

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