Database of Steel and Alloy (Marochnik)

HOME

STANDARDS

METALS

SEARCH

BULLETIN BOARD

GRADING

EDUCATION IN UKRAINE

CONTACTS

(495)
(495)

Metals -> Structural steel -> Alloy structurall steel

Characteristics of the material 20KHN4FА ( 20HN4FА, 20ХН4ФА ).

Material :	20KHN4FА ( 20HN4FА, 20ХН4ФА )
Substitute:	18Х2Н4МА
Classification :	Alloy structurall steel

Chemical composition in % of the material 20KHN4FА ( 20HN4FА, 20ХН4ФА ) .

C	Si	Mn	Ni	S	P	Cr	V	Cu
0.17 - 0.24	0.17 - 0.37	0.25 - 0.55	3.75 - 4.15	max 0.025	max 0.025	0.7 - 1.1	0.1 - 0.18	max 0.3

Temperature of critical points of the grade 20KHN4FА ( 20HN4FА, 20ХН4ФА ).

Ac₁ = 710 , Ac₃(Ac_m) = 750 , Mn = 310

Mechanical properties under Т=20^oС of the material 20KHN4FА ( 20HN4FА, 20ХН4ФА ) .

Assortment	Dimension	Direct.	s_в	s_T	d₅	y	KCU	Heat treatment
-	mm	-	MPa	MPa	%	%	kJ / m²	-
Bar	Ж 25		880	685	12	50	980	Guenching and drawing

Brinell hardness of the material 20KHN4FА ( 20HN4FА, 20ХН4ФА ) (annealing) ,

HB 10^-1= 269 MPa

Physical properties of the material 20KHN4FА ( 20HN4FА, 20ХН4ФА ) .

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						360
100		11.7	38			410
200		12.7	38			480
300		13.7	37			560
400			35			640
500			34			720
600		15.4	31
700			29			1020
800			28			1120
900			27			1180
T	E 10^{- 5}	a 10⁶	l	r	C	R 10⁹

Technological properties of the material 20KHN4FА ( 20HN4FА, 20ХН4ФА ) .

Weldability:	is not used.
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

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

Top

Информация взята с сайта Марочник стали и сплавов

Главная | Новости | Марочник сталей | Контакты | Обратная связь

-12345-