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Metals -> Tool steel -> Tool steel for roller

Characteristics of the material 75KHM ( 75HM, 75ХМ ).

Material :	75KHM ( 75HM, 75ХМ )
Substitute:	9Х2
Classification :	Tool steel for roller

Chemical composition in % of the material 75KHM ( 75HM, 75ХМ ) .

C	Si	Mn	Ni	S	P	Cr	Mo
0.7 - 0.8	0.2 - 0.6	0.2 - 0.7	max 0.5	max 0.03	max 0.03	1.4 - 1.7	0.2 - 0.3

Mechanical properties under Т=20^oС of the material 75KHM ( 75HM, 75ХМ ) .

Assortment	Dimension	Direct.	s_в	s_T	d₅	y	KCU	Heat treatment
-	mm	-	MPa	MPa	%	%	kJ / m²	-
Steel	500	longitudinal	750	430	19	41	240	Double normalizing and drawing

Physical properties of the material 75KHM ( 75HM, 75ХМ ) .

T	E 10^{- 5}	a 10⁶	l	r	C	R 10⁹
Grade	MPa	1/Grade	Watt/(m·Grade)	kg/m³	J/(kg·Grade)	Ohm·m
20				7900
100			45		490
200			41		500
300			40		530
400			39		570
500			38		640
600			37		750
700			35		900
800					700
900					760
1000					810
T	E 10^{- 5}	a 10⁶	l	r	C	R 10⁹

Technological properties of the material 75KHM ( 75HM, 75ХМ ) .

Weldability:	is not used.
Flakes :	weakly predisposed
Temper brittleness:	not predisposed

Specification :

Mechanical properties :
s_в	- Tensile strength , [MPa]
s_T	- 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 20^o - T ) , [1/Grade]
l	- Termal (heat) condition coefficient , [Watt/(m·Grade)]
r	- Density , [kg/m³]
C	- Specific heat ( range 20^o - T ), [J/(kg·Grade)]
R	- Electrical resistance , [Ohm·m]

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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