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Characteristics for grade 40KKHNM ( 40КХНМ )

Grade :	40KKHNM ( 40КХНМ )
Classification :	Precision alloy for elastic elements
Equivalent grades:	Is absent

Chemical composition in % for grade 40KKHNM ( 40КХНМ )

Fe	C	Si	Mn	Ni	S	P	Cr	Mo	Co
10.74 - 18.73	0.07 - 0.12	max 0.5	1.8 - 2.2	15 - 17	max 0.02	max 0.02	19 - 21	6.4 - 7.4	39 - 41

Mechanical properties under Т=20^oС for grade 40KKHNM ( 40КХНМ )

Assortment	Dimension	Direct.	s_в	s_T	d₅	y	KCU	Heat treatment
-	mm	-	MPa	MPa	%	%	kJ / m²	-
Wire heat-treatment, GOST 51397-99			950	450	65
Wire, GOST 51397-99			1450	1300	8
Band cold-worked , GOST 14117-85			1370-1770

Types of delivery of grade 40KKHNM ( 40КХНМ )

B34 - Ribbons

B73 - Steel Alloy Wire

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]

40KKHNM ( 40КХНМ ) - Precision alloy for elastic elements: chemical composition, mechanical and physical properties, hardness
Database of steels and alloys (Marochnik) contains information about chemical composition and properties more then 3000 steels and alloys

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