1m long
To BS 1407 1970
Tollerance +0 – 0.027mm
C Mn Cr
1.2 0.4 0.4
can be used unhardened if required harden at 770 – 780c and quench in water

temper 150-300c

hard 120 150 200 250 300 350 400c
66 65 64 62 59 56 54 50
63 63 62 61 58 55 53 48

all HRC values