Specialty Steel Round Bars

Element

C

Si

Mn

Cr

Ni

P

S

Cu

B(boron)

From

0.47

0.17

0.50

0.10

max0.30

max0.025

max0.025

max0.30

0.001-0.0045

To

0.55

0.37

0.80

0.30

Mechanical properties

Condition at the time of delivery:

Finish condition: Heat treated （refined）

σ_B，MPa

-

≥800

σ_T, MPa

-

≥550

δ₅，%

-

≥10

Ψ，%

-

≥40

α_{k ，}kgf.m/cm²

-

≥6

Brinell hardness-HB

≤217(condition upon delivery:annealed-OT)

-