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

Characteristics of the material 22K ( 22K, 22К ).

Material :	22K ( 22K, 22К )
Substitute:	25К
Classification :	High quality structural carbon steel

Chemical composition in % of the material 22K ( 22K, 22К ) .

C	Si	Mn	Ni	S	P	Cr	Ti	Cu
0.18 - 0.26	0.17 - 0.4	0.7 - 1	max 0.3	max 0.04	max 0.04	max 0.4	max 0.05	max 0.3

Temperature of critical points of the grade 22K ( 22K, 22К ).

Ac₁ = 724 , Ac₃(Ac_m) = 845 , Ar₃(Arc_m) = 815 , Ar₁ = 682

Mechanical properties under Т=20^oС of the material 22K ( 22K, 22К ) .

Assortment	Dimension	Direct.	s_в	s_T	d₅	y	KCU	Heat treatment
-	mm	-	MPa	MPa	%	%	kJ / m²	-
Sheet	60 - 90		440				600	Normalizing 940 - 960^oC,Drawing 630 - 650^oC,Cooling air, 65 ^oC/h,
Sheet	30 - 70		510	250	22	50	850

Physical properties of the material 22K ( 22K, 22К ) .

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	2.11		51.7	7859		173
100	2.08	11.75	51	7834	470	219
200	2.05	12.2	48.5	7803	483	292
300	2	12.8	44.4	7770		381
400	1.91	13.2	42.7	7736	525	487
500	1.8	13.5	39.3	7699	571	601
600	1.65	13.85	35.6	7659		758
700		14.6	31.9	7617		925
800		12.7	25.9	7624		1094
900		12.4	26.4	7600		1135
1000		13.4	27.7	7548		1167
1100		14.2	28.5	7496		1194
1200		14.8	29.8			1219
T	E 10^{- 5}	a 10⁶	l	r	C	R 10⁹

Technological properties of the material 22K ( 22K, 22К ) .

Weldability:	limited weldability.
Flakes :	not 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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