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

Characteristics of the material 35KHM   ( 35HM,   35 ).

Material : 35KHM   ( 35HM,   35 )
Substitute: 40, 40, 30, 35
Classification : Relaxation-resistant steel


Chemical composition in % of the material 35KHM   ( 35HM,   35 ) .
C Si Mn Ni S P Cr Mo Cu
0.32 - 0.40.17 - 0.370.4 - 0.7max   0.3max   0.035max   0.0350.8 - 1.10.15 - 0.25max   0.3


Temperature of critical points of the grade 35KHM   ( 35HM,   35 ).
Ac1 = 755 ,      Ac3(Acm) = 800 ,       Ar3(Arcm) = 750 ,       Ar1 = 695


Mechanical properties under =20o of the material 35KHM   ( 35HM,   35 ) .
Assortment Dimension Direct. s sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Forging max thickness 100 longitudinal 950 750 13 42650Guenching 850 - 880oC, oil, Drawing 585 - 650oC,
Forging max thickness 120 longitudinal 900 710 13 42650Guenching 850 - 880oC, oil, Drawing 585 - 650oC,
Forging max thickness 150 longitudinal 800 600 14 45650Guenching 850 - 880oC, oil, Drawing 585 - 650oC,
Forging max thickness 200 longitudinal 700 500 16 45600Guenching 850 - 880oC, oil, Drawing 585 - 650oC,


    Brinell hardness of the material   35KHM   ( 35HM,   35 )   (annealing) ,       HB 10 -1= 241   MPa


Physical properties of the material 35KHM   ( 35HM,   35 ) .
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 2.18     7820   328
100 2.16 12.3 40.6 7800 462 360
200   12.6 39.8 7770    
300 2.05 12.9 38.5 7740   425
400 1.95 13.9 37.3 7700   523
500 1.86 14.4   7660   628
600   14.6        
T E 10- 5 a 10 6 l r C R 10 9


Technological properties of the material 35KHM   ( 35HM,   35 ) .
  Weldability: limited weldability.
 Flakes : predisposed
Temper brittleness: not predisposed



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]

Weldability :
without limitations - welding is done without heating and subsequent heat treeting
limited weldability - welding is possible under heating up to 100-120 grade and subsequent heat treeting
hard weldability - obtaining the quality welding needs the additional operations:heating up to 200-300 grade; the heat treeting ia annealing

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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