Import Black Painted High Carbon Steel Strip — Buy in wholesale FOB from Supplier in China

The black painted high carbon steel strip from Guangzhou Shiguang Weiyouliang Trading Co., Ltd. is a flat-rolled steel product with carbon content ranging from 0.60% to 1.05%, positioning it in the hypereutectoid to near-eutectoid range where hardness and tensile strength reach peak levels for plain carbon steels将从该供应商获取的碳含量范围与典型工业标准进行对比，并注意到该数值处于高碳钢的典型区间内. The black painted finish provides a protective layer against atmospheric corrosion during storage and transit, though the specific paint system (alkyd, epoxy, or other) is not detailed in the source data. This material grade is supplied in strip form, indicating continuous or semi-continuous rolling with subsequent slitting to width, rather than discrete sheet or plate. The supplier's description positions the product for structural components, automotive parts, and heavy-duty applications where strength-to-weight ratio and wear resistance are critical.

Carbon levels of 0.60% to 1.05% result in microstructures dominated by pearlite and cementite upon proper heat treatment, with as-rolled hardness typically in the 200-300 BHN range depending on processing history. The black scale formed during hot rolling provides limited corrosion protection; the additional painted layer extends storage life and may serve as a primer for subsequent coating operations. Typical tensile strength for this carbon range in normalized strip condition is 700-1000 MPila, with yield strength of 400-700 MPa and elongation of 6-12% depending on temper. The material is amenable to quenching and tempering to achieve hardnesses of 45-60 HRC for tool and spring applications, though such processing is typically performed by the end-user rather than the strip supplier. Surface quality standards for this product category typically require freedom from laminations, cracks, and rolled-in scale, with dimensional tolerances per EN 10048 or ASTM A568/A568M depending on specified standard.

Primary applications include spring steel for automotive and industrial suspensions, hand tool blanks, saw blades, knives, and structural reinforcement where higher strength than mild steel is required but alloy steel costs are not justified. The strip format suits progressive die stamping, roll forming, and CNC machining operations. Buyers should confirm with Guangzhou Shiguang Weiyouliang Trading Co., Ltd. the exact thickness range, width capabilities, coil weights, edge condition (slit, sheared, or rounded), and whether the material is supplied in annealed, normalized, or as-rolled condition. Surface finish requirements, coil inner diameter, and packaging for ocean freight should also be specified. The supplier's trading company status suggests they may source from multiple mills; buyers requiring mill test certificates with full chemical and mechanical certification should verify traceability and original manufacturer details.

Guangzhou Shiguang Weiyouliang Trading Co., Ltd. is located on Shiqiao Street, Panyu District, Guangzhou City, China, postal code 511400. The supplier holds a harbor trust tier, with both response rate and average response hours recorded at zero. This lack of responsiveness data means buyers must proactively test communication channels and evaluate quotation timeliness during initial engagement. The company's name includes 'Trading Co., Ltd.', indicating it operates as a trading intermediary rather than a direct manufacturer, which implies sourcing from multiple steel producers rather than maintaining captive rolling capacity.

No information is provided regarding establishment date, registered capital, annual turnover, number of employees, export markets served, or specific quality management certifications. The supplier's profile does not indicate verification of factory audit, ISO certification, or third-party accreditation. Buyers should request business registration documents, trading authorization from producing mills, and evidence of quality control procedures including incoming inspection and outgoing certification. Given the trading company structure, full traceability to original melt and mill source may require explicit contractual terms. The Panyu District location places the company within Guangzhou's commercial and industrial zone with access to major port facilities, though specific logistics capabilities must be confirmed directly.