INDUSTRY CORP.BEARING-GRADE MARTENSITIC STAINLESS STEEL
High-hardness stainless bearing balls for precision rolling contact, valves, pumps and wear-critical mechanical systems.
PRODUCT OVERVIEW
AISI 440C balls are high-carbon, high-chromium martensitic stainless steel rolling elements produced for high hardness, wear resistance and dimensional stability.
Compared with AISI 52100 chrome steel, 440C provides improved behavior in many mild corrosive environments. Compared with 304 or 316, it is much harder but less resistant to aggressive chloride, marine and acidic exposure.
TECHNICAL SPECIFICATIONS
Values below are product-family references. The quotation, drawing, agreed standard and inspection plan control the final supply specification.
PRODUCT SELECTION GUIDANCE
Material selection affects load, wear, corrosion, temperature, precision, service life and total program cost.
KEY PERFORMANCE FEATURES
Heat treatment supports high hardness, dimensional stability and wear resistance.
Controlled grade, roundness and surface finish support anti-friction applications.
Improves upon chrome steel in many humid or mildly corrosive systems.
Material, hardness, geometry and surface records can be aligned with OEM qualification.
TYPICAL APPLICATIONS
Application names are starting points—not approval of universal suitability. Share the real medium, load, speed, pressure, temperature, life target and compliance needs.
Anti-friction bearings and rolling systems requiring high hardness and stainless behavior.
Wear-resistant seating and checking elements for compatible fluids.
Repeated engagement and rolling contact in industrial mechanisms.
Selected components where exact cleaning chemistry and documentation are approved.
QUALITY & DOCUMENTATION
Document requirements should be defined before quotation so the inspection method, sampling level, traceability and external testing can be planned correctly.
PACKAGING OPTIONS
Final packing depends on material, diameter, surface sensitivity, order weight, storage time and destination.
Size-separated bags, bottles, trays or protected containers for samples, repair and qualification lots.
Inner bags, cartons, pails or steel drums selected around diameter, total weight and handling method.
Clean/dry, passivated, lightly oiled or rust-preventive packing according to alloy and storage risk.
Customer labels, counted packs, batch separation, export pallets and line-ready packaging by agreement.
Supported formats: bulk packaging · small-quantity packaging · plastic containers · bags · cartons · export pallets · customized packaging.
SMALL QUANTITY & SAMPLE ORDERS
SDBALLS Industry Corp. supports North American customers with sample quantities, prototype requirements, testing programs and specialty ball inquiries.
For bearing or valve qualification, provide speed, load or pressure, fluid, grade, surface finish, hardness, lubrication and document requirements.
PRODUCT FAQ
SDBALLS supplies reference sizes from 0.5–150 mm in metric and inch dimensions, subject to grade and quantity.
Typical grades include G20, G40, G80, G100, G200, G500 and G1000. Confirm noise, vibration, roundness and surface needs for bearing duty.
440C is more corrosion resistant than chrome steel in many mild environments, but 316/316L or ceramic should be considered for seawater, chlorides and aggressive acids.
Yes. 440C is martensitic and magnetic.
Yes. Define the required material certificate, dimensional report, hardness report, compliance record, PPAP-style documentation or third-party test before quotation so the correct inspection plan can be priced.
Yes. SDBALLS Industry Corp. supports North American buyers with samples, prototype quantities, repair lots and small-batch programs where the requested size, grade and material condition are available.
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View technical overview ↗CONTACT SDBALLS U.S.
Include product, material, size or shot size, grade, hardness, finish, quantity, packaging, application and required documentation for a faster quotation.
SDBALLS Industry Corp.Email: info@sdballs.usWhatsApp: +1 424 351 5470Website: www.sdballs.usNorth American Business Support