Import 5120 Steel Bright Surface Bar — Buy in wholesale FOB from Supplier in China

The 5120 Steel Bright Surface Bar is a case-hardening alloy steel supplied by Dongguan Songshun Mould Steel Co., Ltd. from their facility in Chang'an Town, Dongguan, Guangdong Province, China. Also designated 16MnCr5 or 1.7147 under European standards, this chromium-molybdenum-nickel grade is offered in round bar diameters from 20 mm to 800 mm and plate formats up to 800 mm thick, with lengths extending to 9,000 mm. The bright surface finish indicates cold-drawn or turned, ground, and polished condition, eliminating decarburised scale and providing tight dimensional control for precision-machined components. The supplier states that dimensions can be customised beyond standard stock sizes.

Chemical composition limits are published as: carbon 0.17-0.23%, silicon 0.17-0.37%, manganese 0.60-0.95%, phosphorus and sulphur each maximum 0.035%, chromium 0.40-0.70%, molybdenum 0.20-0.30%, and nickel 0.35-0.75%. These ranges align with standard 5120/16MnCr5 specifications and support controlled hardenability for carburising or carbonitriding treatments. Typical core hardness after suitable heat treatment reaches up to 41 HRC, with case hardness achievable at 58-64 HRC after carburising and quenching. The material is supplied in the as-rolled or heat-treated condition (including 'H' condition with controlled hardenability) per buyer requirement, though specific certification must be requested.

Primary applications span automotive drivetrain components including gears, ring gears, shafts, and crankshafts, plus bearing races, pins, and high-tensile chains in heavy machinery. Buyers are typically tier-one automotive suppliers, industrial gear manufacturers, and specialist engineering workshops. The supplier offers additional services including peeling, milling, grinding, cutting, and heat treatment. Exact MOQ, price per kilogramme, and lead time for customised dimensions are not stated and must be confirmed with the supplier directly. Incoterms, packaging for ocean freight, and mill certificate provision should also be clarified before order commitment.

Dongguan Songshun Mould Steel Co., Ltd. is located at No.4 Dongda Street, Sha Tou, Dongguan 523850, China, with operations centred in Chang'an Town, a district known for mould and die manufacturing in the Pearl River Delta. The supplier carries an imported-tier and harbor-tier designation, indicating some level of platform verification, though the response rate is recorded at 0.00 percent with zero average response hours. Buyers should anticipate potential communication delays and plan for proactive follow-up or alternative contact methods.

The company profile states complete vertical integration from manufacturing through marketing to distribution, with steel exported globally. It offers value-added services including peeling, milling, grinding, cutting, and heat treatment, and claims that all steel passes quality detection. No ISO certification, specific quality system registration, annual tonnage capacity, major client list, or financial data is provided in the source material. The profile does not state founding year, employee count, or production equipment specifications. Buyers should request factory audit reports, quality system certificates, and reference customers before committing to structural or safety-critical applications.