Metals -> High-temperature or heat-resistant steel and alloy -> Relaxation-resistant steel Characteristics of the material 20KH1M1F1TR ( 20H1M1F1TR, 20Õ1Ì1Ô1ÒÐ ).
Material : 20KH1M1F1TR ( 20H1M1F1TR, 20Õ1Ì1Ô1ÒÐ ) Classification : Relaxation-resistant steel
Chemical composition in % of the material 20KH1M1F1TR ( 20H1M1F1TR, 20Õ1Ì1Ô1ÒÐ ) . C Si Mn Ni S P Cr Mo V Ti B 0.17 - 0.24 max 0.35 max 0.5 max 0.5 max 0.03 max 0.03 0.9 - 1.4 0.8 - 1.1 0.7 - 1 0.05 - 0.12 max 0.005
Temperature of critical points of the grade 20KH1M1F1TR ( 20H1M1F1TR, 20Õ1Ì1Ô1ÒÐ ).
Ac1 = 800 - 830 , Ac3 (Acm ) = 890 - 930
Mechanical properties under Ò=20o Ñ of the material 20KH1M1F1TR ( 20H1M1F1TR, 20Õ1Ì1Ô1ÒÐ ) .
Assortment
Dimension
Direct.
s â
s T
d 5
y
KCU
Heat treatment - mm - MPa MPa % % kJ / m2 - Rolled stock longitudinal 800 700 15 60 600 Guenching 980o C, oil, Drawing 700o C, 5 - 7h,
Brinell hardness of the material 20KH1M1F1TR ( 20H1M1F1TR, 20Õ1Ì1Ô1ÒÐ ) (hot-rolled, annealing) , HB 10 -1 = 229 MPa
Physical properties of the material 20KH1M1F1TR ( 20H1M1F1TR, 20Õ1Ì1Ô1ÒÐ ) . 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 2.15 7850 100 2.12 42.3 200 2.08 12 40.6 300 2.02 12.3 40.2 400 1.94 12.85 39.8 500 1.83 13 39.4 600 1.74 13.5 38.9 700 1.53 13.55 38.5 800 38.1 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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