Metals -> High-temperature or heat-resistant steel and alloy -> Relaxation-resistant steel Characteristics of the material 25KH1M1F ( 25H1M1F, 25Õ1Ì1Ô ).
Material : 25KH1M1F ( 25H1M1F, 25Õ1Ì1Ô ) Classification : Relaxation-resistant steel
Chemical composition in % of the material 25KH1M1F ( 25H1M1F, 25Õ1Ì1Ô ) . C Si Mn Ni S P Cr Mo V Cu 0.22 - 0.29 0.17 - 0.37 0.4 - 0.7 max 0.26 max 0.025 max 0.03 1.5 - 1.8 0.6 - 0.8 0.15 - 0.3 max 0.2
Temperature of critical points of the grade 25KH1M1F ( 25H1M1F, 25Õ1Ì1Ô ).
Ac1 = 770 - 805 , Ac3 (Acm ) = 840 - 880
Mechanical properties under Ò=20o Ñ of the material 25KH1M1F ( 25H1M1F, 25Õ1Ì1Ô ) .
Assortment Dimension Direct. s â s T
d 5
y KCU Heat treatment - mm - MPa MPa % % kJ / m2 - Forging max thickness 300 650 450 16 50 600 Normalizing and high drawing
Physical properties of the material 25KH1M1F ( 25H1M1F, 25Õ1Ì1Ô ) . 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 2.16 7820 233 100 2.14 10.9 40.6 7800 283 200 2.1 12 39.8 7770 349 300 2.05 12.7 39 7740 428 400 1.97 13.65 37.7 7700 519 500 1.86 13.72 36 7670 633 600 1.71 13.82 33.9 7640 746 700 14 31 7600 862 T E 10- 5 a 10 6 l r C R 10 9
Specification :
Mechanical properties : s â - 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]
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