Casting Iron Ball

Description:
items size Φ10 Φ15 Φ20 Φ25 Φ30 Φ40 Φ50 Φ60 Φ70 Φ80 Φ90 Φ100 Φ110 Φ120 Φ130 tolerance +0.1 -0.5 +2.0 -0.1 +0.3 -0.1 +3.5 -0.1 Difference between Max diam and Min diam ≤1.0 ≤2.0 ≤3.0 ≤4.0 series sign Chemical components HRC C Cr Si Mn P S High chrome grinding ball ZGCr20 2.0~2.8 18~22 ≤1.0 0.5~1.5 ≤0.10 ≤0.06 ≥56 High chrome grinding ball ZGCr15 2.0~3.0 12~17 ≤1.0 0.5~1.5 ≤0.10 ≤0.06 ≥56 Middle chrome grinding ball ZGCr8 2.1~3.2 7~10 0.5~2.2 0.5~1.5 ≤0.10 ≤0.06 ≥48 Low chrome grinding ball ZGCr2 2.2~3.6 1.5~3.0 ≤1.2 0.5~1.5 ≤0.10 ≤0.10 ≥45 Bainite ductile casting iron ball ZQSi3 3.2~3.8 _ 2.0~3.5 2.0~3.0 ≤0.10 ≤0.03 ≥50