Metals -> Structural steel -> High quality structural carbon steel Characteristics of the material 40 ( 40, 40 ).
Material : 40 ( 40, 40 ) Substitute: 35, 45, 40г Classification : High quality structural carbon steel
Chemical composition in % of the material 40 ( 40, 40 ) . C Si Mn Ni S P Cr Cu As 0.37 - 0.45 0.17 - 0.37 0.5 - 0.8 max 0.25 max 0.035 max 0.035 max 0.25 max 0.3 max 0.08
Temperature of critical points of the grade 40 ( 40, 40 ).
Ac1 = 724 , Ac3 (Acm ) = 790 , Ar3 (Arcm ) = 760 , Ar1 = 680
Mechanical properties under Т=20o С of the material 40 ( 40, 40 ) .
Assortment Dimension Direct. s в s T
d 5
y KCU Heat treatment - mm - MPa MPa % % kJ / m2 - Rolled stock to 80 580 340 19 45 600 Normalizing Sheet cold-rolled to 4 520 18 Sheet hotrolled to 4 520 17 Sheet to 60 570 20 Normalizing Pipe cold-rolled 580 320 17 Normalizing Pipe hotrolled 600 340 16
Brinell hardness of the material 40 ( 40, 40 ) (annealing) , HB 10 -1 = 187 MPa Brinell hardness of the material 40 ( 40, 40 ) (hot-rolled, annealing) , HB 10 -1 = 163 MPa Brinell hardness of the material 40 ( 40, 40 ) (cold-drawn, cold-worked) , HB 10 -1 = 207 MPa
Physical properties of the material 40 ( 40, 40 ) . 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 2.13 51.5 7850 483 160 100 2.1 11.9 50.6 486 221 200 1.98 12.7 48.1 497 296 300 1.9 13.5 45.6 512 387 400 1.85 14.05 41.9 529 493 500 1.79 14.5 38.1 550 619 600 1.67 14.9 33.5 574 766 700 1.6 15.15 30 628 932 800 12.5 24.8 674 1110 900 13.5 25.7 657 1150 1000 14.5 26.9 653 1180 1100 15.2 28 649 1207 1200 15.8 29.5 649 1230 T E 10- 5 a 10 6 l r C R 10 9
Technological properties of the material 40 ( 40, 40 ) . Weldability: limited weldability. 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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