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Characteristics for grade 38KH2NM ( 38Х2НМ )

Grade :	38KH2NM ( 38Х2НМ )
Substitute:	34ХН1М, 40ХН2МА
Classification :	Alloy structurall steel
Equivalent grades:	Is absent

Chemical composition in % for grade 38KH2NM ( 38Х2НМ )

C	Si	Mn	Ni	S	P	Cr	Mo
0.32 - 0.42	0.17 - 0.37	0.5 - 0.8	0.6 - 0.9	max 0.03	max 0.03	1.8 - 2.3	0.2 - 0.3

Mechanical properties under Т=20^oС for grade 38KH2NM ( 38Х2НМ )

Assortment	Dimension	Direct.	s_в	s_T	d₅	y	KCU	Heat treatment
-	mm	-	MPa	MPa	%	%	kJ / m²	-
Forging	to 300		830	680	12	38	500	Guenching 850 - 870^oC,Drawing 590 - 620^oC,
Forging	300 - 500		740	580	12	35	450	Guenching 850 - 870^oC,Drawing 590 - 620^oC,
Forging	500 - 800		700	530	10	30	400	Guenching 850 - 870^oC,Drawing 590 - 620^oC,

Brinell hardness for 38KH2NM ( 38Х2НМ ) (normalize) ,	HB 10^-1 = 207 - 235 MPa
Brinell hardness for 38KH2NM ( 38Х2НМ ) (quenching, tempering) ,	HB 10^-1 = 237 - 321 MPa

Technological properties for grade 38KH2NM ( 38Х2НМ )

Flakes :	predisposed
Temper brittleness:	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

38KH2NM ( 38Х2НМ ) - Alloy structurall steel: 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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