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Metals -> High-temperature or heat-resistant steel and alloy -> Low alloy high-temperature steel

Characteristics of the material 12KHM   ( 12HM,   12 ).

Material : 12KHM   ( 12HM,   12 )
Classification : Low alloy high-temperature steel


Chemical composition in % of the material 12KHM   ( 12HM,   12 ) .
C Si Mn Ni S P Cr Mo Cu
0.09 - 0.150.15 - 0.30.4 - 0.7max   0.25max   0.025max   0.030.4 - 0.60.4 - 0.6max   0.2


Temperature of critical points of the grade 12KHM   ( 12HM,   12 ).
Ac1 = 720 ,      Ac3(Acm) = 880 ,       Ar3(Arcm) = 790 ,       Ar1 = 695


Mechanical properties under =20o of the material 12KHM   ( 12HM,   12 ) .
Assortment Dimension Direct. s sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Pipe 273 x 28 longitudinal 455 284 31.5 66.51930Normalizing 910 - 930oC,Drawing 670 - 690oC,Cooling air,
Sheet 4 - 50   440 245 22  600 


Physical properties of the material 12KHM   ( 12HM,   12 ) .
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 2.16     7850 498  
100 2.1 11.2 50.24     240
200 2.04 12.5 50.24   519 330
300 1.99 12.7 50.24   569 410
400 1.93 12.9 48.56   595 540
500 1.82 13.2 46.89   653 640
600 1.73 13.5 46.05   733 740
700   13.8 43.96   888 900
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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