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Metals -> Structural steel -> High quality structural carbon steel

Characteristics of the material 50 ( 50, 50 ).

Material :	50 ( 50, 50 )
Substitute:	45, 50Г, 50Г2, 55
Classification :	High quality structural carbon steel

Chemical composition in % of the material 50 ( 50, 50 ) .

C	Si	Mn	Ni	S	P	Cr	Cu	As
0.47 - 0.55	0.17 - 0.37	0.5 - 0.8	max 0.25	max 0.04	max 0.035	max 0.25	max 0.25	max 0.08

Temperature of critical points of the grade 50 ( 50, 50 ).

Ac₁ = 725 , Ac₃(Ac_m) = 760 , Ar₃(Arc_m) = 750 , Ar₁ = 690 , Mn = 300

Mechanical properties under Т=20^oС of the material 50 ( 50, 50 ) .

Assortment	Dimension	Direct.	s_в	s_T	d₅	y	KCU	Heat treatment
-	mm	-	MPa	MPa	%	%	kJ / m²	-
Forging	to 100	longitudinal	570	315	17	38	390	Normalizing
Forging	100 - 300	longitudinal	530	275	17	38	340	Normalizing

Brinell hardness of the material 50 ( 50, 50 ) (normalize) ,

HB 10^-1= 207 MPa

Physical properties of the material 50 ( 50, 50 ) .

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	2.16		48	7810		272
100	2.13	11.2	48		487
200	2.07	12	47		500
300	2	12.8	44		517
400	1.8	13.4	41		533
500	1.71	13.9	38		559
600	1.54	14.2	35		584
700	1.36	14.5	31
800	1.23	13.4	27
T	E 10^{- 5}	a 10⁶	l	r	C	R 10⁹

Technological properties of the material 50 ( 50, 50 ) .

Weldability:	hard weldability.
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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