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20 MnB 5 AS

Romania STAS 20MnB5AS Resistant steels at low and high temperatures for assembling parts. Grades and technical requirements for quality and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 20MnB5AS / 20 MnB 5 AS
Category Grade Standard Region/Area Standard Content
Metals 20 MnB 5 AS STAS 11290 Romania Resistant steels at low and high temperatures for assembling parts. Grades and technical requirements for quality

Chemical composition(mass fraction)(wt.%) of the 20 MnB 5 AS

Element Min Max Similar
Ti 0.0100 0.0400 -
Si 0.1000 0.4000 -
S - 0.0350 -
P - 0.0350 -
Ni - 0.3000 -
Mo 0.1500 0.3000 -
Mn 1.1000 1.4000 -
Cu - 0.3000 -
Cr 0.9000 1.3000 -
C 0.1700 0.2300 -
B 0.0030 0.0050 -
As - 0.0500 -
Al 0.0150 0.0700 -

Mechanical Properties of steel grade 20 MnB 5 AS

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)
558 (≥) 356 (≥) 43 31 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 124

Physical Properties of steel grade 20 MnB 5 AS

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 - -     0.41 -  
164 471 - 32.3 434   -  
175 - 34 21.2   122 332

Heat Treatment of steel grade 20 MnB 5 AS

Heat treated : 1628°C - 1692°C

Technological Curves of steel grade 20 MnB 5 AS

Cross Reference Table (Equivalent Grade) of 20 MnB 5 AS

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