Characteristics of the material 45KHNM ( 45HNM, 45ХНМ ).
Material :
45KHNM ( 45HNM, 45ХНМ )
Substitute:
40ХН2МА
Classification :
Tool steel for roller
Chemical composition in % of the material 45KHNM ( 45HNM, 45ХНМ ) .
C
Si
Mn
Ni
S
P
Cr
Mo
0.4 - 0.5
0.17 - 0.37
0.5 - 0.8
1.2 - 1.6
max 0.04
max 0.04
1.3 - 1.7
0.1 - 0.3
Temperature of critical points of the grade 45KHNM ( 45HNM, 45ХНМ ).
Ac1 = 750 , Ac3(Acm) = 780
Mechanical properties under Т=20oС of the material 45KHNM ( 45HNM, 45ХНМ ) .
Assortment
Dimension
Direct.
sв
sT
d5
y
KCU
Heat treatment
-
mm
-
MPa
MPa
%
%
kJ / m2
-
Forging
100 - 300
635
440
14
40
540
Normalizing
Brinell hardness of the material 45KHNM ( 45HNM, 45ХНМ ) (normalize) ,
HB 10 -1= 197 - 248 MPa
Brinell hardness of the material 45KHNM ( 45HNM, 45ХНМ ) (quenching, tempering) ,
HB 10 -1= 197 - 262 MPa
Technological properties of the material 45KHNM ( 45HNM, 45ХНМ ) .
Weldability:
is not used.
Flakes :
predisposed
Temper brittleness:
weakly 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). Helpfull for specialists in material technology, structural engineer, mechanical engineer, metallurgy and metal trader