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America ASME BTi-4 Specification for filler metals for brazing and braze welding and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: BTi-4 / BTi-4
Category Grade Standard Region/Area Standard Content
Metals BTi-4 ASME SFA-5.8/SFA-5.8M America Specification for filler metals for brazing and braze welding

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

Element Min Max Similar
C - 0.0400 -
Si - 0.0200 -
Ni 15.0000 17.0000 -
Mo - 1.5000 -
Cu 15.0000 17.0000 -
Ti - - -
Zr 23.5000 24.5000 -
Al - 0.0500 -
N - 0.0300 -
Fe - 0.0800 -
O - 0.2000 -
Hf - 0.1000 -
Others total - 0.5000 -

Mechanical Properties of steel grade BTi-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)
918 (≥) 982 (≥) 42 32 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 231

Physical Properties of steel grade BTi-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
41 - -     0.41 -  
569 148 - 33.3 424   -  
637 - 22 22.2   333 233

Heat Treatment of steel grade BTi-4

Heat treated : 1432°C - 1452°C

Technological Curves of steel grade BTi-4

Cross Reference Table (Equivalent Grade) of BTi-4

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