... - 40mm 3.hardness:HRC25-28 unannealed/HRC48 annealed 65Mn stainless steel spring sheet1.grade:65Mn2.thickness:0.1- 40mm 3.hardness ... produce other standard or size as customers' requestmentWuxi Runchang Stainless Steel Material Co.,Ltd is a professional manufacturer and seller, ... -510-83630958Address:No.B101-106,No.2,East Stainless Steel City,No.118,Beihuan Road,Wuxi,China. stainless steel spring sheet