Import Bearing Alloy Steel E52100 1.3505 Round Rods — Buy in wholesale FOB from Supplier in China

E52100 bearing alloy steel round rods, designated 1.3505 under DIN standards, are high-carbon chromium alloy bars supplied by Dongguan Songshun Mould Steel Co., Ltd. from their facility in Dongguan, Guangdong Province. The material contains approximately 1.0% carbon and 1.3-1.6% chromium, giving it exceptional hardenability and wear resistance for rolling-contact applications. Available diameters span 20mm to 800mm with lengths from 3000mm to 9000mm, though buyers should confirm current stock dimensions directly with the supplier. The rods are hot-rolled or forged and subsequently annealed to a typical hardness of 190-230 HB, enabling ready machining before final heat treatment.

The chromium content in E52100 forms hard carbides during austenitizing and quenching, delivering surface hardness of 58-64 HRC after standard through-hardening. Through-hardening depth depends on section size, with oil quenching standard for diameters under approximately 50mm and interrupted quenching or martempering for larger sections to reduce distortion. Typical spheroidized annealing produces a microstructure of fine spheroidal carbides in a ferritic matrix, optimizing machinability prior to bearing component fabrication. The grade conforms to ASTM A295 (E52100), DIN EN ISO 683-17 (1.3505), and JIS G4805 (SUJ2) specifications, though buyers should request mill test certificates to verify conformance for their specific order.

Primary applications include ball and roller bearing inner and outer rings, rolling elements, bushings, and precision shafts for automotive transmissions, electric motors, and industrial gearboxes. The material also serves aircraft engine bearings and high-speed spindle applications where fatigue resistance under cyclic loading is critical. Dongguan Songshun lists this material for international B2B supply with custom dimensions available upon request. The supplier's response rate shows as 0.00 with zero average response hours recorded, so direct enquiry through their listed contact channels is essential to confirm availability, current MOQ, and precise delivery schedules.

Dongguan Songshun Mould Steel Co., Ltd. operates from No.4 Dongda Street, Sha Tou, Dongguan 523850, in the Guangdong-Hong Kong-Macao Greater Bay Area, a region with extensive metal processing and mould-making infrastructure. The company carries an imported supplier tier designation and harbor trust tier classification on the platform, with no response rate or average response time currently recorded in their profile. Their listed product focus centres on mould and bearing steels for industrial manufacturing applications, with E52100 round rods representing one specialty grade among their offering.

The supplier profile does not state founding year, employee count, revenue figures, or named client references, so any such claims would be speculative. Their verification signals are limited to the tier and trust designations noted above. Buyers should treat direct communication as essential: the lack of response metrics suggests either a new listing, limited platform engagement, or data not yet populated. Requesting mill test certificates, ISO 9001 certification copies, and sample material for independent spectrographic analysis would be prudent first steps before committing to bulk orders.