Metals -> Structural steel -> High quality structural carbon steel Characteristics of the material 15 ( 15, 15 ).
Material : 15 ( 15, 15 ) Substitute: 10, 20 Classification : High quality structural carbon steel
Chemical composition in % of the material 15 ( 15, 15 ) . C Si Mn Ni S P Cr Cu As 0.12 - 0.19 0.17 - 0.37 0.35 - 0.65 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 15 ( 15, 15 ).
Ac1 = 735 , Ac3 (Acm ) = 860 , Ar3 (Arcm ) = 840 , Ar1 = 685
Mechanical properties under Т=20o С of the material 15 ( 15, 15 ) .
Assortment Dimension Direct. s в s T
d 5
y KCU Heat treatment - mm - MPa MPa % % kJ / m2 - Steel hotrolled 375 27 55 As-delivered state
Brinell hardness of the material 15 ( 15, 15 ) (annealing) , HB 10 -1 = 149 MPa Brinell hardness of the material 15 ( 15, 15 ) (normalize) , HB 10 -1 = 101 - 156 MPa
Physical properties of the material 15 ( 15, 15 ) . T E 10- 5 a 10 6 l r C R 10 9 Grade MPa 1/Grade Watt/(m·Grade) kg/m3 J/(kg·Grade) Ohm·m 20 2.01 53 7850 100 1.92 12.4 53 7827 465 233 200 1.85 13.2 53 7794 486 296 300 1.76 13.9 49 7759 515 387 400 1.56 14.4 46 7724 532 487 500 14.8 43 7687 565 607 600 15.1 39 7648 586 753 700 15.3 36 7611 620 904 800 14.1 32 7599 691 1092 900 13.2 30 7584 708 1140 T E 10- 5 a 10 6 l r C R 10 9
Technological properties of the material 15 ( 15, 15 ) . Weldability: without limitations. Flakes : not predisposed Temper brittleness: not predisposed
Specification :
Mechanical properties : s в - Tensile strength , [MPa] s T - Yield stress, [MPa] d 5 - 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 20o - T ) , [1/Grade] l - Termal (heat) condition coefficient , [Watt/(m·Grade)] r - Density , [kg/m3 ] C - Specific heat
( range 20o - 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
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