Changzhou Huari Steel Ball Co., Ltd is an ISO9001: 2015 and IATF16949: 2016 certified professional manufacturer of steel balls with experience of more than 30 years. We owns more than 500 sets advanced production equipment and more than 100 sets of testing devices to ensure the quality of the steel balls. Custom service to meet our customers' needs are our core strength. Sizes & Material The factory produces ball sizes from 0.5mm to 250mm. Offering stainless steel balls in 304/L, 316/L, 420/C, 440/C stainless steel. A wide range of material and sizes steel balls are available for choosing. Stainless steel balls: AISI304, 304L, 316, 316L(G100-G1000),AISI420, 420C, 440, 440C(G10-G1000) . AISI304/304L G40 5mm Stainless Steel Ball China Japan U.S. Germany Hardness OCr18Ni9 SUS304 AISI304 1.4301 HRC 25-39 00Cr19Ni10 SUS304L AISI304L 1.4307 HRC 25-39 0Cr17Ni12Mo2 SUS316 AISI316 1.4401 HRC 25-39 0Cr19Ni12Mo2 SUS316L AISI316L 1.4404 HRC 25-39 3Cr13 420J2 AISI420 1.4028 HRC 48-58 4Cr13 - AISI420C 1.3541, 1.4034 HRC52-56 9Cr18 - AISI440 HRC57-61 9Cr18Mo SUS440C AISI440C 1.4125 HRC58-64 Material CHEMICAL COMPOSITION % C Si Mn P S Ni Cr Mo Ti AISI304 ≤0.08 ≤1.00 ≤2.00 ≤0.045 ≤0.03 8.0-11.0 18-20 AISI304L ≤0.03 ≤1.0 ≤2.00 ≤0.045 ≤0.03 9.0-12.0 18-20 AISI316 ≤0.08 ≤1.00 ≤2.00 ≤0.035 ≤0.03 10.0-14 16.0-18.5 2.0-3.0 AISI316L ≤0.030 ≤1.00 ≤2.00 ≤0.045 ≤0.03 10.0-14 16.0-18 2.0-3.0 AISI420(3Cr13) 0.26-0.35 ≤1.0 ≤1.0 ≤0.04 ≤0.035 ≤≤0.60% 12.0-14.0 AISI420C(4Cr13) 0.36-0.45 ≤0.60 ≤0.8 ≤0.035 ≤0.03 ≤0.6 12.0-14.0 AISI440 (9Cr18) 0.9-1 ≤0.8 ≤0.8 ≤0.035 ≤0.80 ≤0.60 17.0-19.0 ≤0.75 AISI440C (9Cr18Mo) 0.9-1 ≤0.8 ≤0.8 ≤0.035 ≤0.03 ≤0.60 16.0-18.0 ≤0.75 Grade: G10 to G1000 Grade ball diameter spherical surface lot diameter nomainal ball variation deviation roughness variation deviation tolerance Vdws Sph Ra Vdwl Tdn not over μm 10 0.25 0.25 0.02 0.5 * 16 0.4 0.4 0.025 0.8 * 20 0.5 0.5 0.032 1 * 24 0.6 0.6 0.04 1.2 * 28 0.7 0.7 0.05 1.4 * 40 1 1 0.06 2 * 60 1.5 1.5 0.08 3 * 100 2.5 2.5 0.1 5 ±12.5 200 5 5 0.15 10 ±25 500 12.5 12.5 * 25 ±50 1000 25 25 * 50 ±125 Austenitic Stainless Steel Ball(AISI304, 304L, 316, 316L)Strong Anti-Rust Performance, Can Be In Direct Contact With Neutral Liquids. Special Bearings, Water Pumps, Valves, Aerosols, Dispensers, Food Machinery, Medical, Cosmetics And Other Fields. Martensite Stainless Steel Balls(AISI420, 420C, 440, 440C)Precision Bearings, Auto Parts, Bicycles, Mixers, Slide Rails, Conveyor Belts, Skateboards, Casters, Valves, Etc. 1.Q: Can you provide free sample? Yes, we can offer you free sample when we have them in stock and you just need to pay the shipping fee. 2.Q: What's the terms of payment? T/T, Trade Assurance order on Alibaba, Western Union or Cash. 3.Q: What the certification do you have? ISO 9001,IATF 16949,ROHS,SGS,BV. 4.Q: What is the lead time? Balls in stock could be delivered within 3-5 days once confirmed the order. For mass order or customized products, it takes about 20-30 days. 5.Q: What's your advantage? Why we choose you? 1) More than 30 years balls manufacture experience. 2) Great production capacity Sustainable Supply. According to customer requirements. We support the customized products including package. 3) Large stock and wide size range. Welcome customers designs, we supply OEM & ODM service dirt bike parts bushing bearing housing bu