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Characteristics for grade     25L   ( 25Л )



      Grade :     25L   ( 25Л )
      Substitute:   20Л, 30Л
      Classification :   Non-alloy casting steel
      Equivalent grades:   Go here



Chemical composition in % for grade   25L   ( 25Л )
C Si Mn S P
0.22 - 0.30.2 - 0.520.45 - 0.9max   0.06max   0.06


Temperature of critical points for grade   25L   ( 25Л ).
Ac1 = 735 ,      Ac3(Acm) = 840 ,       Ar3(Arcm) = 824 ,       Ar1 = 680


Mechanical properties under Т=20oС for grade   25L   ( 25Л )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Casting, GOST 977-88 to 100   441 235 19 30392Normalizing 880 - 900oC,Drawing 610 - 630oC,
Casting, GOST 977-88     491 294 22 33343 


    Brinell hardness for     25L   ( 25Л )   ,       HB 10 -1 = 124 - 207   MPa


Technological properties for grade   25L   ( 25Л )
  Weldability: limited weldability.
 Flakes : not predisposed
Temper brittleness: not predisposed


Technological properties of the material   25L   ( 25Л ) .
        Linear shrinkage : 2.2 - 2.3   %


Heat treatment of the material   25L   ( 25Л )
Normalizing 880 - 900 ° C, Tempering 610 - 630 ° C
Hardening 870 - 890 ° C, Tempering 610 - 630 ° C


Physical properties for grade   25L   ( 25Л )
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     51 7830    
100   11.5 76   470  
200   12.9 65   483  
300   13 44      
400   13.2 38   525  
500   13.5        
600         571  
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     25L   ( 25Л )
Warning! Indicated both exact and nearest equivalents.
USAGermanyJapanFranceEnglandItalySwedenBulgariaHungaryPolandRomaniaCzechiaAustria
-DIN,WNrJIS AFNORBSUNISSBDSMSZPNSTASCSNONORM
2A
A10
GrLCA
GrWCB
N1
1.0443
1.0446
GS-45
GS45
SC410
SC46
230-400-M
A48M1
FA-M
161-430
161-430A
FeG45
1305
25LI
25LII
Ao450FK
L450
LII400
OT450-3
422640
GS45



Types of delivery of grade   25L   ( 25Л )
B42 - Rails: Pads, Pads, Crutches
B82 - Steel Castings


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]

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

  25L   ( 25Л ) - Non-alloy casting steel: chemical composition, mechanical and physical properties, hardness
Database of steels and alloys (Marochnik) contains information about chemical composition and properties more then 3000 steels and alloys

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