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Brazil NBR AF-Mn-B4 Steel castings of austenitic manganese - Specification and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: AF-Mn-B4 / AF-Mn-B4
Category Grade Standard Region/Area Standard Content
Metals AF-Mn-B4 ABNT NBR 7243 Brazil Steel castings of austenitic manganese - Specification

Chemical composition(mass fraction)(wt.%) of the AF-Mn-B4

Element Min Max Similar
C 1.2000 1.3500 -
Mn 11.5000 14.0000 -
P - 0.0700 -
Si - 1.0000 -

Mechanical Properties of steel grade AF-Mn-B4

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)
755 (≥) 971 (≥) 21 23 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 341

Physical Properties of steel grade AF-Mn-B4

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
22 - -     0.13 -  
528 323 - 21.3 212   -  
949 - 34 41.2   313 412

Heat Treatment of steel grade AF-Mn-B4

Heat treated : 1523°C - 1888°C

Technological Curves of steel grade AF-Mn-B4

Cross Reference Table (Equivalent Grade) of AF-Mn-B4

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