Metals -> Structural steel -> High quality structural carbon steel Characteristics of the material 25 ( 25, 25 ).
Material : 25 ( 25, 25 ) Substitute: 20, 30 Classification : High quality structural carbon steel
Chemical composition in % of the material 25 ( 25, 25 ) . C Si Mn Ni S P Cr Cu As 0.22 - 0.3 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 25 ( 25, 25 ).
Ac1 = 735 , Ac3 (Acm ) = 835 , Ar3 (Arcm ) = 825 , Ar1 = 680
Mechanical properties under Т=20o С of the material 25 ( 25, 25 ) .
Assortment Dimension Direct. s в s T
d 5
y KCU Heat treatment - mm - MPa MPa % % kJ / m2 - Forging 100 - 300 530 275 17 38 340 Guenching and drawing
Brinell hardness of the material 25 ( 25, 25 ) (cold-drawn, cold-worked) , HB 10 -1 = 207 MPa Brinell hardness of the material 25 ( 25, 25 ) (hot-rolled, annealing) , HB 10 -1 = 156 MPa Brinell hardness of the material 25 ( 25, 25 ) (quenching, tempering) , HB 10 -1 = 156 - 197 MPa
Physical properties of the material 25 ( 25, 25 ) . 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 1.98 7820 169 100 1.96 12.2 51 470 219 200 1.91 13 49 483 292 300 1.86 13.7 46 381 400 1.63 14.3 43 521 488 500 14.7 40 571 601 600 15 36 758 700 15.2 32 925 800 26 T E 10- 5 a 10 6 l r C R 10 9
Technological properties of the material 25 ( 25, 25 ) . 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
Top
© 2003 - 2009 All rights reserved. About program.
Информация взята с сайта Марочник стали и сплавов
© 2002 - 2009 Мосспецсталь. Все права защищены
