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Metals -> Casting steel -> Casting steel for general purposes

Characteristics of the material 55L ( 55L, 55Л ).

Material :	55L ( 55L, 55Л )
Substitute:	50Л
Classification :	Casting steel for general purposes

Chemical composition in % of the material 55L ( 55L, 55Л ) .

C	Si	Mn	Ni	S	P	Cr	Cu
0.52 - 0.6	0.2 - 0.52	0.4 - 0.9	max 0.3	max 0.045	max 0.04	max 0.3	max 0.3

Temperature of critical points of the grade 55L ( 55L, 55Л ).

Ac₁ = 725 , Ac₃(Ac_m) = 770 , Ar₃(Arc_m) = 755 , Ar₁ = 690

Mechanical properties under Т=20^oС of the material 55L ( 55L, 55Л ) .

Assortment	Dimension	Direct.	s_в	s_T	d₅	y	KCU	Heat treatment
-	mm	-	MPa	MPa	%	%	kJ / m²	-
Casting	to 100		600	350	10	18	240	Normalizing 840 - 860^oC,Drawing 600 - 630^oC,

Brinell hardness of the material 55L ( 55L, 55Л ) ,

HB 10^-1= 159 - 255 MPa

Physical properties of the material 55L ( 55L, 55Л ) .

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				7820
100		11	68		479
200		11.8	55		487
300
400		13.4	36		525
500			32
600		14.5			571
T	E 10^{- 5}	a 10⁶	l	r	C	R 10⁹

Technological properties of the material 55L ( 55L, 55Л ) .

Weldability:	hard weldability.
Flakes :	not predisposed
Temper brittleness:	not predisposed

Technological properties of the material 55L ( 55L, 55Л ) .

Linear shrinkage, % :

2.2 - 2.3

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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