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스테인리스 스틸 볼
선양 지아신 스틸 볼 공장
스테인레스 스틸 볼
스테인리스 스틸 볼은 자동차, 항공우주, 의료 및 정밀 엔지니어링을 포함한 다양한 산업에서 널리 사용됩니다. 구성에 따라 주로 세 가지 유형으로 분류됩니다. 높은 경도와 내식성을 제공하는 AISI 440C 스테인리스 스틸, 우수한 내식성으로 알려진 AISI 304 스테인리스 스틸, 고부식 환경에 이상적인 AISI 316 스테인리스 스틸입니다. 이러한 볼은 특정 산업적 요구 사항을 충족하기 위해 다양한 직경과 등급으로 제공됩니다.
저희 회사는 중간 마진 없이 고품질 스테인리스 스틸 볼을 제조하고 직접 공급하는 데 특화되어 있어 가장 경쟁력 있는 가격을 보장합니다. 업계에서 30년 이상의 경험을 바탕으로 저희는 정확한 사양에 따라 정밀 스틸 볼을 생산하는 전문성을 자랑스럽게 생각합니다. 소량이든 대량이든, 저희는 귀하의 필요에 맞는 다양한 크기와 등급을 제공할 수 있습니다. 저희의 첨단 제조 공정은 뛰어난 품질과 정밀성을 보장하여 귀하의 응용 분야에서 최적의 성능을 위해 최소한의 허용 오차로 볼을 제공합니다. 신뢰할 수 있고 비용 효율적인 솔루션과 뛰어난 고객 서비스를 위해 저희를 선택하세요.
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Frequently asked questions
Stainless Steel Ball FAQ
A stainless steel ball is any precision ball manufactured from a corrosion-resistant iron-chromium alloy containing at least ~10.5 % chromium, which forms a passive Cr2O3 film that self-repairs in oxygen. Common grades include 302, 304, 316, 420A, 420B, 420C, 440A, 440B and 440C, covering martensitic, ferritic and austenitic structures for different hardness and corrosion needs.
Stainless balls are made from three families: austenitic (302, 304, 316, 316L) - non-magnetic, best corrosion resistance; martensitic (420A, 420B, 420C, 440A, 440C) - magnetic, hardenable up to HRC 60; and precipitation-hardened (17-4PH, 17-7PH) - high strength at moderate corrosion. Selection depends on hardness needs, magnetic constraints, and operating environment.
Stainless steel resists corrosion through a chromium-rich passive oxide layer that forms spontaneously when chromium exceeds ~10.5 %. When damaged, the layer self-heals in the presence of oxygen. Higher chromium, plus molybdenum and nitrogen (as in 316 / 316L), boosts pitting resistance against chlorides and acids, making stainless the default for wet, marine, or chemical environments.
No. Only austenitic stainless (302 / 304 / 316 / 316L) is reliably non-magnetic. Martensitic stainless (420 / 440 series) is magnetic and often slightly stronger than ferrite. After cold working, even 304 can pick up slight magnetism. For guaranteed non-magnetic behavior, request 316L in the annealed condition or specify the 'NM' inspection.
Austenitic grades (302 / 304 / 316) reach about HRC 25-40 in cold-worked condition. Martensitic 420A and 420B typically top out at HRC 50, 420C at HRC 55-58, and 440C at HRC 58-60. For higher hardness at temperature, look to 17-4PH (HRC 44-47) or Stellite cobalt alloy. Aluminum oxide and silicon nitride ceramic offer HRC equivalents above 75.
Stainless balls comply with ASTM A493 (wire), AISI / SAE grade definitions, ISO 6938-1 for stainless wire, DIN 5401 for ball dimensions, ISO 3290 for precision grades, and ASTM A967 for passivation. Material certificates to EN 10204 3.1 confirm chemistry and mechanical properties for every shipment.
Stainless balls are routinely produced in AFBMA / ISO 3290 grades G10, G16, G20, G25, G40, G60, G100, G200, G500 and G1000. G10-G25 are reserved for 440C instrument and aerospace bearings; G100-G200 cover pumps, valves, pharmaceutical and food processing; G500-G1000 are typical for hardware and casters.
Stainless steel balls appear in food and beverage valves (304/316), chemical pumps (316), medical devices (316L), marine fasteners (316), aerospace bearings (440C / 17-4PH), photographic shutters (440C), spray nozzles (440C), locks (304), and high-precision bearings requiring corrosion resistance or non-magnetic behavior at acceptable load ratings.
We stock stainless balls from 0.3 mm to 200 mm. The most common industrial diameters are 1-50 mm. Sub-millimeter balls for ball-point pens are supplied down to 0.2 mm; very large stainless balls for decorative architecture or flow control are produced by machining and polishing up to 250 mm diameter.
Stainless steel wins for corrosion resistance, food / medical / marine compatibility and (for austenitic grades) non-magnetic use. Chrome steel (52100) wins for hardness, precision, load rating and price - typically 40-60 % cheaper per kg than 440C. Use chrome steel for dry, high-load bearings, and stainless steel for wet or chemically aggressive environments.
Passivation is a chemical treatment (typically citric or nitric acid) that removes free iron and enriches the chromium oxide layer on stainless steel surfaces, restoring full corrosion resistance after machining. ASTM A967 and AMS 2700 define the procedures. We passivate all 304 / 316 stainless balls as standard and can re-passivate any lot on request.
304 and 316 stainless steel are FDA / EU 1935-compliant for food contact. 316L is preferred for low-carbon weldments. Avoid 420 and 440 series in direct food contact because their lower corrosion resistance can leach alloys under acidic conditions. All our food-grade balls ship with FDA and RoHS documentation on request.
316 / 316L stainless steel balls (containing 2-3 % molybdenum) are the industry standard for marine, salt-spray, and chloride-rich environments. They withstand 1000-hour ASTM B117 salt-spray tests. For harsher or subsea duty, specify 904L or, where load and precision allow, silicon nitride ceramic balls which are completely immune to salt water.
Stainless balls are vacuum-packed with desiccant and shipped in food-grade PE bags inside PE-lined cartons (20-25 kg) or steel drums (50-200 kg). For clean-room or medical orders, double-bag with nitrogen flush is available. Export pallets are stretch-wrapped and ISPM-15 heat-treated for sea container shipping.
Price varies with grade (304 vs 316 vs 440C), diameter, precision grade, lot size, and inspection level. 316 / 316L commands roughly 30-50 % premium over 304 due to molybdenum content. Hardening (440C) and lapping (G10 / G25) add process cost. Mill surcharges follow nickel and chromium LME pricing on a one-month lag.
Clean stainless balls with warm deionized water, mild detergent (pH 6-9), and a soft cloth or ultrasonic bath. Avoid chloride-rich cleaners, steel wool (which causes rust spots), and prolonged bleach exposure. After cleaning, rinse with deionized water and dry with filtered air to maintain passivation. Ultrasonic cleaning at 40 kHz is ideal for micro balls.
Yes. Stainless steel balls are 100 % recyclable and keep their alloy identity - scrap from 316 returns to 316 melt. We segregate scrap by grade and offer certified scrap buy-back for high-volume customers. Recycling stainless uses about 70 % less energy than virgin production, supporting ISO 14001 and ESG reporting.
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