High Chromium Cast Grinding Media, Mill Balls

• Certification: ISO 9001:2008
• Standard: AISI, ASME, JIS, GB, ASTM, DIN
• Surface Treatment: Sand Blast
• Manufacturing Process: Casting
• Material: Chrome Steel or as Customer′s Request
• Breakage: <1%
• Model NO.: multi-type
• Transport Package: Container Bags or Steel Drums
• Specification: Dia 20mm-125mm
• Trademark: OEM
• Origin: China
• HS Code: 7325910000
• Production Capacity: 260000 Metric Tonnes Per Year

Product Description

Products

JOC Machinery supply SAG mill and ball mill grinding media for site-specific grinding conditions.

Casting Steel Balls

Item	Brand	Chemical Composition									Surface Hardness (HRC)
		C	Mn	Si	Cr	Mo	Cu	Ni	P	S	Quenched	Unquenched
High Chrome Cast Iron	ZQCr20	2.0-3.0	0.5-1.5	≤1.0	18-22	0-2.5	0-1.2	0-1.5	≤0.10	≤0.10	≥56	≥45
High Chrome Cast Iron	ZQCr15	2.0-3.0	0.5-1.5	≤1.0	12-17	0-3.0	0-1.0	0-1.5	≤0.10	≤0.10	≥56	≥45
High Chrome Cast Iron	ZQCr13	2.0-3.0	0.5-1.5	≤1.0	11-14	0-1.0	0-2.0	0-1.5	≤0.10	≤0.10	≥56	≥49
Middle Chrome Cast Iron	ZQCr7	2.1-3.2	0.5-1.5	0.5-2.2	6-10	0-1.0	0-0.8	0-1.5	≤0.10	≤0.10	--	≥48
Low Chrome Cast Iron	ZQCr2	2.2-3.6	0.5-1.5	≤1.2	1.0-3.0	0-1.0	0-0.8	--	≤0.10	≤0.10	--	≥45

 
Forged Steel Balls

Ball Mill Grinding Media
Grade	Size Range	Chemical Composition				Average Volumetric Hardness (HRC)
		C	Mn	Si	Cr
Ultra Hard	20-80mm	0.75-1.02	0.73-0.95	0.15-0.35	0.25-0.55	59-63
Ultra Hard-2	20-80mm	0.86-1.00	0.80-1.00	0.40-0.75	0.35-0.80	61-63
Ultra Hard-3	20-80mm	0.90-1.10	0.80-1.00	0.40-0.95	0.35-0.80	59-63
Through Hard	90-125mm	0.75-0.90	0.60-1.40	0.30-1.85	0.20-0.80	59-61
Through Hard-2	90-115mm	0.85-1.00	0.80-1.00	0.40-1.75	0.40-0.85	61-63

 

SAG Mill Balls
Grade	Size Range	Chemical Composition				Average Volumetric Hardness (HRC)
		C	Mn	Si	Cr
1	125-133mm	0.70-0.90	0.30-1.00	0.50-1.85	0.30-1.00	60-62
2	133-150mm	0.70-0.90	0.60-1.00	0.15-0.35	0.70-1.00	60-63
3	90-115mm	0.70-0.90	0.30-1.40	0.30-1.40	0.50-1.00	60-63
4	125-160mm	If interested, please contact us for inquiry.				57-60
5	90-115mm					59-60
6	140-160mm					60-63
7	125mm					58-60

We deliver the size, grade and chemical composition in our grinding media according to the ore characteristics, milling methords and other requests of our customers.


Annual Production Capacity

120,000 metric tonnes of roll-forged balls 
80,000 metric tonnes of hammer-forged balls
60,000 metric tonnes of casting balls








Should you would like to know how we can help with your next project, please contact us today!