Chemical Composition
|
Grade
|
（Carbon Steel）Chemical Composition (mass fraction) %
|
||||||
|
C
|
Si
|
Mn |
P
|
S
|
Alt
|
Others
|
|
|
45
|
0.42～0.50
|
0.15～0.37
|
0.50～0.90
|
≤0.030
|
≤0.030
|
- |
Cu≤0.25, Ni≤0.30, Cr≤0.20, N≤0.008
If the supplier can guarantee it, no analysis will be carried out) |
Physical Properties
|
Grade
|
Yield Strength
(MPa) |
Tensile Strength (MPa)
|
Elongation A80mm %
|
Reduction of Area %
|
Impact Force
(J) |
Impact Toughness Value (J/cm²)
|
Hardness:
Untempered |
Hardness:
Annealing Treatment |
|
45
|
≥355
|
≥600
|
≥16
|
≥40
|
≥39
|
≥49
|
≤ 241HB
|
≤ 179HB
|
Corresponding Standards and Similar Grade Comparison
|
ASTM
|
BS
|
NF
|
DIN
|
JIS
|
GB
|
|
1045
|
080A46
|
XC45
|
C45,CK45
|
S45C
|
45
|
Characteristics
-
High Strength: It has a high carbon content for greater strength.
-
Easy to Machine: It can be easily cut and shaped.
-
Tough: It is resistant to shock and wear.
-
Heat Treatable: Its properties can be altered through heat treatment.
-
Widely Used: Commonly used for making mechanical parts like gears and bolts.