• Model NO.：DIA25-150MM
• Customized：Non-Customized
• Breakage Rate：1% Max
• Surface Hardness：HRC55-65
• Transport Package：Steel Drum , Container Bag
• Specification：ISO9001: 2008
• Trademark：ZW
• Origin：Zhangqiu, Shandong, China
• HS Code：73261100
• Production Capacity：50000 Tons

MaterialChemical elementsCSiMnP/SCrB20.72-0.850.17-0.370.7-1.0<0.040.4-0.660Mn0.55-0.650.17-0.370.7-1.0<0.04<0.2545#0.42-0.500.17-0.370.5-0.8<0.035≤0.25B30.58-0.661.6-1.90.65-0.8<0.0250.7-0.9 
                                  Hardness
  
Material
  
25mm-50mm
HRC 
60mm-90mm
HRC 
100mm-125mm
HRC
 SurfaceCoreSurfaceCoreSurfaceCoreB260-6558-6258-6350-5556-6040-4560Mn58-6355-6058-6340-4556-6030-3545#55-5845-5555-5830-3550-5525-30B3    58-6256-60 

Production Description 
 
1) Traditional Forged 
 
Raw material →Cutting  →Heating  → Water quenching  → Tempering2) Auto Hot Rolling
 
 Raw material  →Hot Rolling Mill  → Water Quenching  → Tempering 

Packing
Steel drum (800-950kg per drum) &Container Bag (1000kg per bag) 

QC&QI
1) Raw material: Size, Chemcial elements, Microstructure quality control (LAIWU STEEL)
2) Production Technical: Cutting Size, Heating Temperature, Quenching Technical, Tempering control.
3) Grinding Balls: Hardness, Size, Chemcial elements, Breakage Rate Checking
4) Thrid-Pary: SGS, BV ISO, TUV, COTECNA, AsiaInspection etc.

Company Profile
Jinan Zhongwei established in 2000 , we are a leading manufacturer and professional exporter grinding balls in China.
Our company covers an area of 15000 square meters, now we have 150 staff, including 13 technical staff. Annual output is 50000 tons to 80000 tons .
Main products : forged steel ball, cast iron ball ,grinding rod, cylpebs
We have exported to 20 more countries, UAE, Zambia,South Africa, Peru, Chile, Australia, UK, USA, Turkey and so on.