... standard 2) Specification: M24*135/145/195 3) Grade: 4, 5, 6,8,9,10,12 4) Raw material: Q235 ... , 35K, 45#, 40Mn2, 20Mnsi, 35CrMo, 40Cr, 42CrMo 5) Surface: plain (oil), black paint, color paint, zinc, hdg; ... Raw material: Q235, 35#, 45#, 40Mn2, 20Mnsi 3) Grade: 4.6, 5.6, 8.89. Dog spike/railroad spike 1) Type ... 35#, 45#, 40Mn2, 20MnSI; 35, Cr.42, CrMn 3) Grade: 4.6 4.8 5.6 6.8 10.9 12.910 ...