In Boron steels the addition of boron in low carbon steel improves its hardenability. It is known that a very small quantity of boron can dramatically improve the hardenability of steel. It is also noted that boron added steel can be easily worked as the boron added steel has a smaller amounts of other alloys (ex. Cr, Mo, Ni) and hardenability can be obtained from boron itself. Ductlity and Toughness also improves by the reduction of C and other Elements. By spherodized annealing Boron steel wire rods we significantly alter the microstructure properties of the rod and thereby improving the forging die life.
|S. No.||Grade||Steel Type||Chemical Properties of raw material|
|% C||% Mn||% Si||% P||% S||% Cr||% B|
|1||SAE 10B21||Boron Steel Wire||0.18-0.23||0.70-1.10||0.30 max||0.04 max||0.05 max||0.10 -0.25||0.0005 -0.003|
|2||SAE 15B25||0.23- 0.28||0.90 - 1.30||0.30 max||0.04 max||0.05 max||0.10 -0.25||0.0005 -0.003|
|3||SAE 15B41||0.36 - 0.44||1.35 - 1.65||0.05 - 0.35||0.04 max||0.05 max||0.10 -0.25||0.0005 -0.003|
|4||19MnB4||0.20 - 0.26||0.80 - 1.10||0.30 max||0.04 max||0.05 max||0.30 - 0.40||0.0005 -0.003|