1040g Steel impact ball drop impact test ball

weight	tolerance	material	hardness	Remark
227g	±5%	G20CrNi2Mo	HRC68-75	with ring / without ting
500g	±5%	G20CrNi2Mo	HRC68-75	with ring / without ting
535g	±5%	G20CrNi2Mo	HRC68-75	with ring / without ting
1040g	±5%	G20CrNi2Mo	HRC68-75	with ring / without ting