Characteristics of the material 55S2А ( 55S2А, 55С2А ).
Material :
55S2А ( 55S2А, 55С2А )
Classification :
Spring structural steel
Chemical composition in % of the material 55S2А ( 55S2А, 55С2А ) .
C
Si
Mn
Ni
S
P
Cr
Cu
0.53 - 0.58
1.5 - 2
0.6 - 0.9
max 0.25
max 0.025
max 0.025
max 0.3
max 0.2
Temperature of critical points of the grade 55S2А ( 55S2А, 55С2А ).
Ac1 = 775 , Ac3(Acm) = 840
Mechanical properties under Т=20oС of the material 55S2А ( 55S2А, 55С2А ) .
Assortment
Dimension
Direct.
sв
sT
d5
y
KCU
Heat treatment
-
mm
-
MPa
MPa
%
%
kJ / m2
-
Bar
to Ж 80
1275
1177
6
30
Guenching 870oC, oil, Drawing 470oC,
1300
1200
6
30
Guenching 870oC, oil, Drawing 460oC,
Brinell hardness of the material 55S2А ( 55S2А, 55С2А ) (annealing) ,
HB 10 -1= 241 MPa
Brinell hardness of the material 55S2А ( 55S2А, 55С2А ) (without heat treatment) ,
HB 10 -1= 285 MPa
Technological properties of the material 55S2А ( 55S2А, 55С2А ) .
Weldability:
is not used.
Flakes :
not predisposed
Temper brittleness:
not predisposed
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]
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
Database of steels and alloys (Marochnik) contains information about chemical composition and properties of 1500 steels and alloys (stainless steel, alloy steel, carbone steel, structural steel, tool steel, cast iron, aluminum alloy, titanium alloy, copper alloy, nickel alloy, magnesium alloy and others). Helpfull for specialists in material technology, structural engineer, mechanical engineer, metallurgy and metal trader
