Material:AISI304,316,420C,440C Size:0.8mm-150mm ... Name: Stainless steel ballsMaterial: AISI304,316,420C,440CSize: 0.8mm-150mmGrade: G10-G1000Hardness: AISI304 and AISI316 are soft materials. ... not pass the 72 hours salt bath test.316 is Austenitic stainless steel with features similar to ... OUR MAIN PRODUCTS:Stainless steel ball:AISI302,304,316,420,4440CBearing steel balls:AISIE52100Carbon steel balls: ...