Metals -> Tool steel -> Die tool steel Characteristics of the material 4KH5MFS ( 4H5MFS, 4Õ5ÌÔÑ ).
Material : 4KH5MFS ( 4H5MFS, 4Õ5ÌÔÑ ) Substitute: 4Õ5ÌÔ1Ñ, 4Õ4ÂÌÔÑ Classification : Die tool steel
Chemical composition in % of the material 4KH5MFS ( 4H5MFS, 4Õ5ÌÔÑ ) . C Si Mn Ni S P Cr Mo V Cu 0.32 - 0.4 0.9 - 1.2 0.2 - 0.5 max 0.35 max 0.03 max 0.03 4.5 - 5.5 1.2 - 1.5 0.3 - 0.5 max 0.3
Temperature of critical points of the grade 4KH5MFS ( 4H5MFS, 4Õ5ÌÔÑ ).
Ac1 = 840 , Ac3 (Acm ) = 870 , Ar3 (Arcm ) = 810 , Ar1 = 735 , Mn = 300
Mechanical properties under Ò=20o Ñ of the material 4KH5MFS ( 4H5MFS, 4Õ5ÌÔÑ ) .
Assortment
Dimension
Direct.
s â
s T
d 5
y
KCU
Heat treatment - mm - MPa MPa % % kJ / m2 - Bars 10 1750 1480 570 Guenching 1000 - 1020o C,Drawing 530 - 560o C,Drawing 500 - 520o C,
Brinell hardness of the material 4KH5MFS ( 4H5MFS, 4Õ5ÌÔÑ ) (annealing) , HB 10 -1 = 241 MPa
Physical properties of the material 4KH5MFS ( 4H5MFS, 4Õ5ÌÔÑ ) . 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 29 7750 480 100 30 7724 200 30 7697 300 31 7670 400 33 7641 500 31 7600 600 30 7573 700 28 7546 800 26 7520 900 27 7495 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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