Leaded Bronze Grade B.S. 1400: 1985 Nominal Composition 2% PS N/mm Min Tensile Strength N/mm Min Elongation % Min Brinell Hardness Min LPB-1 76/9/0/15 0 0 0 LB2 80/10/0/10 80 180 8 60 LB3/LBC3 85/10/0/5 100 195 10 65 LB4 85/5/0/10 60 160 7 55 LB5 75/5/0/20 70 150 5 45 LBC3 79/10/1/10 80 180 8 60 LBC4 78/7/0/15 80 170 8 60