Chemical Composition
|
Grade
|
（Carbon Steel）Chemical Composition (mass fraction) %
|
||||||
|
C
|
Si
|
Mn |
P
|
S
|
Alt
|
Others
|
|
|
BJS15C
|
0.13～0.18
|
0.15～0.35
|
0.30～0.70
|
≤0.020
|
≤0.010
|
≤0.060
|
Cu≤0.30
Ni≤0.20 Cr≤0.20 Ni+Cr≤0.35 |
Physical Properties
|
Grade
|
Yield Strength
(MPa) |
Tensile Strength (MPa)
|
Elongation A80mm %
|
Reduction of Area %
|
Hardness:
Untempered |
Hardness:
Annealing Treatment |
|
BJS15C
|
≥784
|
≥980
|
≥8
|
≥30
|
≤ 255HB
|
≤ 229HB |