Specifications

75MnCr forged grinding steel balls for mining
High hardness
good quality, different size and competitive price

 

 1. High hardness: 58-65

 2. Good rust resistance

 3. Good quality, different size and competitive price

 4. Professional technicians

 

Original	China
Brand	NAAO
Material	75MnCr steel
Sizes	20mm-150mm
Hardness	HRC 58-65
Lost roundness rate	<1%
Broken rate	<0.5%
Microstructure	M+C
Standard	YB/T901-2005
Certification	ISO 9001:2008   SGS
Checking	100% sorted
Sales mode	Wholesale or Retail
Delivery way	by sea, by air, DHL, FEDEX, UPS
MOQ	20 TON
Payment term	L/C, D/A, D/P, T/T, Paypal
Production time	15-20 days after order confirmation
Package	container bag or steel drum

 

The Material Chemistry Composition

 

Material	C	Si	Mn	Cr	Ni	P	S
75MnCr	0.7-0.85	0.17-0.37	0.7-0.8	0.2-0.7	8.0-10.5	0.035   max	0.035   max

 

 Physical Property

 

Diameter	Hardness (HRC)	Impact value	Broken rate	Microstructure	Falling ball no.
20-150mm	58-65	15	0.50%	M+C	15000