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Metals -> Tool steel -> Die tool steel

Characteristics of the material 7KH3   ( 7H3,   7Х3 ).

Material : 7KH3   ( 7H3,   7Х3 )
Substitute: 8Х3
Classification : Die tool steel


Chemical composition in % of the material 7KH3   ( 7H3,   7Х3 ) .
C Si Mn Ni S P Cr Mo W V Ti Cu
0.65 - 0.750.15 - 0.350.15 - 0.4max   0.35max   0.03max   0.033.2 - 3.8max   0.2max   0.2max   0.15max   0.03max   0.3


Temperature of critical points of the grade 7KH3   ( 7H3,   7Х3 ).
Ac1 = 770 ,      Ac3(Acm) = 730 ,       Mn = 400


Mechanical properties under Т=20oС of the material 7KH3   ( 7H3,   7Х3 ) .
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
      1320 1240 10 36370Guenching 870oC, oil, Drawing 500oC, 2h,


    Brinell hardness of the material   7KH3   ( 7H3,   7Х3 )   (annealing) ,       HB 10 -1= 229   MPa


Technological properties of the material 7KH3   ( 7H3,   7Х3 ) .
  Weldability: is not used.
 Flakes : predisposed
Temper brittleness: predisposed



Specification :
Mechanical properties :
sв - 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]

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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