Carbon Cored Wire | Precision Carburizing Graphite Wire Feed for Steel & Cast Iron from Zemei Factory

1. Product Overview

Carbon Cored Wire, also known as Pure Carbon Cored Wire and Graphite Cored Wire in global metallurgical markets, is a dedicated high-efficiency Foundry Carburizing Cored Wire for precise carbon content adjustment of molten steel and cast iron, also widely used as standard Carbon Wire Feed for Steelmaking and professional Casting Carburizer Wire for steel plants, ductile iron foundries and gray iron casting workshops. Jiaocheng Zemei Metal Co., Ltd. produces this carbon cored wire with high-purity graphite carbon powder as core raw material, solving the long-standing pain points of traditional carburizer adding: uneven carbon distribution, high burning loss, serious dust pollution and difficult precise carbon content control. Different from block recarburizer manually added to furnace mouth which causes large carbon element fluctuation, our Graphite Cored Wire is fed into deep molten bath via automatic wire feeder, releasing carbon elements uniformly at preset depth, realizing accurate carbon adjustment with error controlled within ±0.02%, greatly improving composition stability of finished steel and castings.

This product adopts 0.3–0.5mm low-carbon steel strip outer shell, filled with high-purity graphite carbon powder inside, sealed through continuous cold rolling to prevent powder leakage. When conveyed into molten steel or molten iron at fixed speed, the steel sheath melts rapidly, carbon powder dissolves evenly inside molten bath, quickly increasing carbon content to target value without introducing harmful impurities such as sulfur and nitrogen. As core Foundry Carburizing Cored Wire for carbon steel smelting and cast iron carbon adjustment, it can be used independently for precise carbon supplementation before tapping or matched with silicon-calcium deoxidation wire for synchronous composite refining treatment. All batches of Carbon Cored Wire comply with international steelmaking and casting auxiliary material standards, each coil passes filling uniformity and air tightness test before delivery, supporting SGS third-party carbon purity inspection for overseas steel and casting buyers. Our cored wire workshop supports customized carbon purity, wire diameter and coil weight to match different automatic wire feeders worldwide.

2.Raw Material & Production Process

Core raw material of Carbon Cored Wire is 95%+ high-purity graphite carbon powder with low sulfur and low nitrogen; raw material undergoes multi-stage purification to control harmful impurities S≤0.03%, N≤0.02%, avoiding negative impact on steel and casting mechanical properties. Outer wrapping material is thin low-carbon steel strip with fast melting performance, no residual hard slag polluting molten metal quality. The whole production line adopts fully automatic constant volume powder supply system to guarantee stable carbon filling rate of each coil, avoiding inconsistent carburizing effect caused by powder content fluctuation of Casting Carburizer Wire.

Complete manufacturing workflow: high-purity graphite powder purification → vibration fine screening → magnetic iron impurity removal → quantitative constant volume powder delivery → steel strip uncoiling U forming → continuous carbon powder filling → double-edge cold airtight sealing → wire diameter sizing → automatic coil winding → finished filling rate & air tightness test → moisture-proof film export packaging. Closed dust removal equipment is installed in the whole production workshop to meet international environmental protection emission standards, satisfying overseas steel factory environmental audit requirements. As high-precision Carbon Wire Feed for Steelmaking, its carbon dissolution rate reaches over 92% after entering molten steel, far higher than 60–70% absorption rate of manual block carburizer adding, effectively saving raw material consumption for steel mills. Our factory stores permanent stock of standard Carbon Cored Wire all year round, overseas bulk full-container orders can be delivered within 7–12 working days.

3.Chemical Composition & Custom Specifications

Standard core carbon powder fixed index of Carbon Cored Wire: Fixed Carbon ≥95%, Volatile Matter ≤1.5%, Ash ≤2.5%, Sulfur ≤0.03%, Nitrogen ≤0.02%. We support customized high-purity grade (C≥98%, S≤0.01%) for high-end clean steel and ductile iron production. Optional wire outer diameters: 10mm, 12mm, 13mm, suitable for all mainstream steel plant and foundry wire feeders. Standard single coil weight: 500kg, 1000kg; coils fixed on fumigated wooden pallets with steel belts for container loading, desiccant added on each pallet to prevent carbon powder damp oxidation during sea transportation.

Each coil of Pure Carbon Cored Wire is attached with English COA test report recording carbon purity, impurity content, filling rate and wire tensile performance data, convenient for overseas steel mill and foundry quality management & customs clearance. As professional supplier of Foundry Carburizing Cored Wire, we provide free sample coils of 50–200kg without MOQ, sample cost can be deducted in subsequent bulk orders. Customizable items include carbon purity grade adjustment, wire diameter change, single coil tonnage and pallet brand LOGO printing, bulk order delivery cycle controlled within 7–12 working days.

5. Wide Application Scenarios

This Foundry Carburizing Cored Wire covers three core industrial fields:

European carbon steel factories mostly select 13mm Carbon Cored Wire for ladle precise carbon adjustment; Southeast Asian gray iron foundries prefer 10mm 500kg-coil Graphite Cored Wire for molten iron carbon supplementation; North American high-end ductile iron manufacturers customize low-sulfur high-purity Foundry Carburizing Cored Wire for premium casting production. As universal Carbon Wire Feed for Steelmaking, it can be matched with silicon calcium deoxidation wire for composite ladle refining treatment, widely recognized by global steel and casting enterprises.

6.Packaging, Logistics & Factory Supply Capacity

Zemei carbon cored wire annual output reaches 4,000 tons, standard coils permanently stocked all year round. Standard export package: single coil wrapped anti-moisture plastic film, fixed on fumigated wooden pallets with steel binding strips; desiccant placed on each pallet to avoid carbon powder damp oxidation during long sea voyage. We cooperate with professional coil freight forwarders, support FOB Tianjin, FOB Shanghai, CIF, CFR trade terms, covering global major ports. Small test coils air delivery 4–8 days, bulk orders 7–12 working days delivery. Full loading photos and coil arrangement videos will be sent to customers after shipment.

7.Custom Service & Strict Quality Control

Zemei provides one-stop customized service for all overseas Carbon Cored Wire purchasers: carbon purity grade adjustment, wire diameter customization, single coil weight design, pallet LOGO printing. Our laboratory equips carbon sulfur analyzer and wire filling rate detector, every finished coil passes triple inspection: core carbon purity test, wire air tightness test, filling rate detection. SGS third-party pre-loading inspection available, all test documents issued in English version. Professional metallurgical technical team provides free online guidance for ladle carburizing dosage calculation and molten iron carbon content precise control solutions.

8. FAQ