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Shot hardness designation #511 01/05/05 02:01 PM
Joined: Apr 1999 Posts: 344 Likes: 1 Mishawaka, IN, USA J Jack Champaigne OP Member
OP Jack Champaigne Member J Joined: Apr 1999 Posts: 344 Likes: 1 Mishawaka, IN, USA	What does the letter "R" stand for in the designation? Example S230R.

Re: Shot hardness designation #512 01/05/05 02:03 PM
Joined: Apr 1999 Posts: 344 Likes: 1 Mishawaka, IN, USA J Jack Champaigne OP Member
OP Jack Champaigne Member J Joined: Apr 1999 Posts: 344 Likes: 1 Mishawaka, IN, USA	The letter after the number designates the hardness range. According to literature from Ervin Amasteel: S hardness 41-51 HRc M hardness 47-56 HRc L hardness 54-61 HRc H hardness 60 HRc minimum I am not familiar with the "R" designation.

Re: Shot hardness designation #513 01/15/05 07:49 AM
Joined: Jul 2004 Posts: 3 Nottingham Neil Stokes Member
Neil Stokes Member Joined: Jul 2004 Posts: 3 Nottingham	Hi Jack The meaning S230(R)means that it should be regular shot hardness 45-52 HRC,all the way through my shot peening career I have used this term.

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