Chemical composition in % of the material 25G ( 25G, 25Г ) .
C
Si
Mn
Ni
S
P
Cr
Cu
0.22 - 0.3
0.17 - 0.37
0.7 - 1
max 0.3
max 0.035
max 0.035
max 0.3
max 0.3
Temperature of critical points of the grade 25G ( 25G, 25Г ).
Ac1 = 723 , Ac3(Acm) = 820
Mechanical properties under Т=20oС of the material 25G ( 25G, 25Г ) .
Assortment
Dimension
Direct.
sв
sT
d5
y
KCU
Heat treatment
-
mm
-
MPa
MPa
%
%
kJ / m2
-
Blank
to 25
500
300
22
50
Guenching 880oC, water, Drawing 560oC, air,
Brinell hardness of the material 25G ( 25G, 25Г ) (annealing) ,
HB 10 -1= 197 MPa
Specification :
Mechanical properties :
sв
- Tensile strength , [MPa]
sT
- Yield stress, [MPa]
d5
- Specific elongation at fracture , [ % ]
y
- Reduction of area , [ % ]
KCU
- Impact strength , [ kJ / m2]
HB
- Brinell hardness , [MPa]
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