• Model NO.：45#, 60MN, B2, B3
• Customized：Customized
• Raw Material Heating：by Electric Furance
• Heat Treatment Method：Oil,Air Quenching
• Certification：ISO9001:2008
• Transport Package：Container Bag, Steel Drum
• Specification：20-150mm
• Trademark：Jinan zhongwei
• Origin：Shandong Jinan
• HS Code：73261100
• Production Capacity：1000000

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  → Tempering

2) 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.