Chemical Composition: C 0.70~1.20% Mn 0.35~1.20% Sií¦0.40% Sí_0.05% Pí_0.05% Hardness: Normalú¦40~50HRC Special: 52~56HRC 56~60HRC Durability: 2000~2800 times Microstructure: Tempered Martensite or Sorbite Density: 7.4g/cm3. Application: Blast cleaning: Used for blast cleaning of casting, die-casting, forging, sand removal of casting, steel plate, H type steel, steel structure. Rust removal: Rust removal of casting, forging, steel plate, H type steel, steel structure, descaling of forging. Shot peening: Shot peening of gear, heat treatment. Shot blasting: Shot blasting of profile steel, ship board, steel board, and steel material. Shot blasting: Shot blasting of steel board, profile steel, steel structure. Pre-treatment: Pre-treatment of surface, steel board, profile steel, steel structure, before-painting. Packing Typesú+ Braided bag packing, flexible container packing, stock packing, paper bag packing, barrel packing.