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

Characteristics of the material 15K ( 15K, 15К ).

Material :	15K ( 15K, 15К )
Substitute:	20К
Classification :	High quality structural carbon steel

Chemical composition in % of the material 15K ( 15K, 15К ) .

C	Si	Mn	Ni	S	P	Cr	Cu	As
0.12 - 0.2	0.15 - 0.3	0.35 - 0.65	max 0.3	max 0.04	max 0.04	max 0.3	max 0.3	max 0.08

Temperature of critical points of the grade 15K ( 15K, 15К ).

Ac₁ = 724 , Ac₃(Ac_m) = 860 , Ar₃(Arc_m) = 830 , Ar₁ = 676

Mechanical properties under Т=20^oС of the material 15K ( 15K, 15К ) .

Assortment	Dimension	Direct.	s_в	s_T	d₅	y	KCU	Heat treatment
-	mm	-	MPa	MPa	%	%	kJ / m²	-
Sheet	4 - 20		380	230	25		800
Sheet	21 - 40		380	220	25		750
Sheet	41 - 60		380	210	25		700

Physical properties of the material 15K ( 15K, 15К ) .

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			7870		200
100	2.08		57	7840	486	219
200	2.05	12	53	7810	498	292
300	2	12.8		7780	514	381
400	1.91	13.2	45	7740	533	487
500	1.8	13.6		7710	555	601
600	1.65	13.85	38	7670	584	758
700				7630	636	925
800					703	1094
900				7610	703	1135
1000				7550	695	1167
1100				7490	691	1194
1200					687	1219
T	E 10^{- 5}	a 10⁶	l	r	C	R 10⁹

Technological properties of the material 15K ( 15K, 15К ) .

Weldability:	without limitations.
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).
Helpfull for specialists in material technology, structural engineer, mechanical engineer, metallurgy and metal trader

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