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Metals -> High-temperature or heat-resistant steel and alloy -> Relaxation-resistant steel

Characteristics of the material 20KHMFBR   ( 20HMFBR,   20 ).

Material : 20KHMFBR   ( 20HMFBR,   20 )
Classification : Relaxation-resistant steel


Chemical composition in % of the material 20KHMFBR   ( 20HMFBR,   20 ) .
C Si Mn Ni S P Cr Mo V Nb Cu B
0.17 - 0.26max   0.370.5 - 0.8max   0.45max   0.03max   0.031 - 1.50.8 - 1.10.7 - 1max   0.15max   0.2max   0.005


Temperature of critical points of the grade 20KHMFBR   ( 20HMFBR,   20 ).
Ac1 = 810 ,      Ac3(Acm) = 950 ,       Ar3(Arcm) = 800 ,       Ar1 = 690


Mechanical properties under =20o of the material 20KHMFBR   ( 20HMFBR,   20 ) .
Assortment Dimension Direct. s sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Bar   longitudinal 900   15 55400Normalizing 1100oC,Drawing 730oC, 5h,
      1076 958 13.3 46.6150Normalizing 1100oC,Drawing 650oC, 6h,


Physical properties of the material 20KHMFBR   ( 20HMFBR,   20 ) .
T E 10- 5 a 10 6 l r C R 10 9
Grade MPa 1/Grade Watt/(mGrade) kg/m3 J/(kgGrade) Ohmm
20 2.17     7900    
100 2.11   41      
200 2.05   46.1      
300 1.96   48.2      
400 1.88   50.2      
500 1.8   52.8      
600 1.67   54.4      
700 1.52   56.1      
T E 10- 5 a 10 6 l r C R 10 9



Specification :
Mechanical properties :
s - Tensile strength , [MPa]
sT - Yield stress, [MPa]
d5 - Specific elongation at fracture , [ % ]
y - Reduction of area , [ % ]
KCU - Impact strength , [ kJ / m2]
HB - Brinell hardness , [MPa]

Physical properties :
T - Test temperature , [Grade]
E - Young modulus , [MPa]
a - Coefficient of linear expansion (range 20o - T ) , [1/Grade]
l - Termal (heat) condition coefficient , [Watt/(mGrade)]
r - Density , [kg/m3]
C - Specific heat ( range 20o - T ), [J/(kgGrade)]
R - Electrical resistance , [Ohmm]

Database of steels and alloys (Marochnik) contains information about chemical composition and properties of 1500 steels and alloys (stainless steel, alloy steel, carbone steel, structural steel, tool steel, cast iron, aluminum alloy, titanium alloy, copper alloy, nickel alloy, magnesium alloy and others).
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