mu 1 50000 psi[1] 50001 100000 psi[2] 100001 150000 psi[3] 150001 200000 psi[4] 200001 250000 psi[5] 250001 300000 psi[6] 300001 350000 psi[7] 350001 400000 psi[8] 400001 450000 psi[9] 450001 500000 psi[10] 500001 550000 psi[11] 550001 600000 psi[12] 600001 650000 gam 650001 700000