Magnesium Rod

Our Magnesium Rod (Magnesium Alloy Bar) is a professional-grade lightweight metal material, manufactured in strict compliance with international standards including ASTM B107, ASTM B843, AMS 4375, ISO 3116, and GB/T 5155-2013. As a direct manufacturer with 17+ years of magnesium processing experience, we offer a full range of extruded magnesium rods, forged magnesium bars, precision ground rods, and application-specific sacrificial anode magnesium rods, with fully customizable dimensions, alloy grades, heat treatments, and surface finishes to meet the rigorous demands of global cathodic protection, aerospace, new energy automotive, medical, precision machining, and marine engineering industries.

1. Full Size Coverage, Precision Tolerance Control : 

- Diameter Range : 1mm (ultra-fine capillary rod) – 400mm (large-diameter forged bar)

- Length Range : Custom cut from 50mm to 6000mm, with fixed-length and random-length options

- Strict Dimensional Tolerance :

 - Precision ground rod: Diameter tolerance h7/h9, roundness ≤0.005mm, straightness ≤0.2mm/m

 - Standard extruded rod: Diameter tolerance h11, straightness ≤0.8mm/m

 - Forged bar: Diameter tolerance ±0.2mm, straightness ≤1.0mm/m

 - Fully compatible with CNC machining centers, automatic lathes, and secondary forming processes

2. 100% Non-Destructive Testing, Zero Internal Defects : 

- All rods with diameter ≥10mm undergo full-coverage ultrasonic flaw detection (UT) in strict accordance with ASTM E114 and EN 10228-3 standards, eliminating internal defects such as porosity, cracks, inclusions, segregation, and delamination.

- Default delivery meets ASTM Grade A qualification, with Grade B/C ultra-high standard products available for aerospace and medical applications.

- Each rod is marked with a unique serial number, with complete Material Test Reports (MTR), UT test reports, and batch traceability records provided for every order.

3. Uniform Mechanical Properties, Minimal Machining Deformation : 

- Advanced homogenization heat treatment and grain refinement technology ensure uniform microstructure of the rod, with hardness deviation ≤±5HB across the full cross-section, and performance difference between longitudinal and transverse directions ≤10%.

- Pre-stress relief annealing is performed on all rods before delivery, eliminating internal stress generated during extrusion and forging, and greatly reducing deformation during customer's subsequent CNC machining, turning, and milling processes.

- Mature production capacity for all mainstream magnesium alloys, with stable tensile strength (180-380MPa), yield strength (120-280MPa), and elongation (8-20%) for each batch.

4. Full Alloy Grade System, Compliant with Global Industry Standards : 

- Covers general-purpose, high-strength, high-temperature resistant, corrosion-resistant, medical-grade, and sacrificial anode special alloy systems, with mature production capacity for all mainstream magnesium alloy grades.

- Custom alloy formulation available: adjust the content of Al, Zn, Zr, Mn, and rare earth elements to optimize strength, corrosion resistance, electrochemical activity, and biocompatibility according to your needs.

- Sacrificial anode magnesium rods comply with ASTM B843 standard, medical-grade WE43 rods are ISO 13485 certified, and aerospace-grade rods meet AMS material specifications.

5. Professional Surface Treatment & Anti-Corrosion Solutions : 

- Full range of optional surface treatments to meet different application needs :

 - Basic finish: As-extruded black skin, pickled bright surface, precision ground polished surface

 - Anti-oxidation protection: Chemical passivation, suitable for indoor storage and subsequent machining, no impact on welding and surface treatment

 - Medium corrosion resistance: Anodizing (AAO), 200+ hours of neutral salt spray resistance, suitable for general outdoor applications

 - High corrosion resistance: Micro-arc oxidation (MAO), 500+ hours of neutral salt spray resistance, suitable for harsh marine and industrial environments

 - Sacrificial anode special treatment: Copper-plated end, cable welding, epoxy coating, ready-to-use for cathodic protection projects

6. Superior Machinability & Processing Efficiency : 

- 30-50% higher machining efficiency than aluminum alloy rods, 2-3x faster than steel rods, with low tool wear, no sticking, and excellent surface finish after turning, milling, drilling, and tapping.

- Excellent formability: Annealed (O-temper) rods support cold heading, bending, forging, and spinning, with no cracking during secondary processing.

- Excellent weldability: Compatible with TIG/MIG welding, friction stir welding, matching the same grade of magnesium welding wire, with stable arc and dense weld seams.

Extruded Magnesium Rod Production Process

- High-Purity Raw Material Melting : 99.95%+ high-purity magnesium ingots and certified alloying elements are melted under argon protection, with online degassing and slag removal technology to eliminate inclusions and gas, and grain refinement treatment to avoid component segregation.

- Homogenization Heat Treatment : Long-time high-temperature homogenization treatment of cast ingots to eliminate internal stress and component segregation, ensuring uniform microstructure of the ingot.

- Hot Extrusion Molding : Large-scale precision extrusion machine, with strict control of extrusion temperature, speed, and extrusion ratio, to form the rod blank, ensuring uniform wall thickness, dense structure, and no surface defects.

- Precision Sizing & Finishing : Precision drawing and peeling process for high-precision rods, to achieve precise diameter tolerance and surface finish; multi-pass grinding for polished rods, to achieve mirror surface effect.

- Heat Treatment : Customized annealing, solution, and aging treatment processes to adjust the mechanical properties of the rod, and final stress relief annealing to eliminate internal stress and reduce machining deformation.

- Surface Treatment & Non-Destructive Testing : Pickling, passivation, anodizing, and other surface treatments; 100% ultrasonic flaw detection for rods with diameter ≥10mm, to eliminate internal defects.

- Final Inspection & Packaging : Full dimensional inspection, mechanical property testing, chemical composition analysis, and packaging according to export standards.

- Ingot Preparation & Homogenization : High-quality continuous casting ingots, with long-time homogenization heat treatment to ensure uniform composition and structure.

- Heating & Forging : Medium-frequency induction heating to the optimal forging temperature, multi-directional free forging or die forging on a hydraulic press, to break the cast structure, refine grains, and improve the density and mechanical properties of the bar.

- Heat Treatment : Solution and aging treatment for heat-treatable alloys, to maximize the strength and toughness of the bar; stress relief annealing to eliminate forging stress.

- Machining & Finishing : CNC turning of the outer circle to the required size, surface finishing, and chamfering of both ends.

- Full-Coverage Non-Destructive Testing : 100% ultrasonic flaw detection on the entire bar, to ensure zero internal defects, with UT test reports provided for each bar.

- Cathodic Protection Sacrificial Anode (Core Application) :

- Our sacrificial anode magnesium rods are produced in strict accordance with ASTM B843 standard, with stable electrochemical performance, high current efficiency, and uniform corrosion, which is the most widely used anti-corrosion material in the world. Typical applications include:

 - Electric water heater, solar water heater anti-corrosion anode rods (with copper cap, cable welding, ready-to-use)

 - Buried oil and gas pipelines, water supply pipelines, and sewage pipelines cathodic protection

 - Crude oil storage tanks, chemical storage tanks, and water tanks anti-corrosion

 - Ship hulls, port facilities, offshore platforms, and marine engineering anti-corrosion

 - Underground metal structures, bridge steel piles, and power grid grounding grid anti-corrosion

- Aerospace & Defense Industry :

- Aircraft and UAV structural parts, landing gear components, engine brackets, and load-bearing frame blanks, meeting AMS aerospace material standards, reducing equipment weight and improving payload capacity.

- Missile and satellite lightweight structural rods, with excellent vibration damping performance to protect precision instruments.

- Military equipment lightweight parts, with high specific strength to improve equipment mobility and combat performance.

3. New Energy & Automotive Industry :

- New energy vehicle (NEV) motor shaft blanks, battery pack structural parts, body-in-white load-bearing rods, and seat frame parts, reducing vehicle weight by 30-50% and extending EV range by 8-15%.

- Automotive chassis parts, steering system components, and interior trim support rods, with excellent vibration damping performance to reduce noise and improve driving comfort.

- Rail transit high-speed rail/metro interior structural parts, equipment support rods, and lightweight frame components.

4. Medical & Healthcare Industry :

- Biodegradable medical magnesium alloy rods (WE43, AZ31B medical grade), ISO 13485 certified, used for bone fixation screws, bone nails, implantable stent blanks, which degrade naturally in the human body, eliminating the need for secondary surgery.

- Surgical instrument structural parts, medical rehabilitation equipment frames, wheelchair lightweight rods, and medical device housing supports, with non-toxic and biocompatible properties.

- Dental implant materials and orthopedic surgical tool blanks, with excellent machinability and biocompatibility.

5. Precision Machining & 3C Electronics :

- 3C electronic product shell blanks, laptop/tablet support rods, smartphone midframe parts, and camera component blanks, with ultra-lightweight and high dimensional stability.

- Precision instrument parts, optical equipment support rods, semiconductor equipment components, using the excellent vibration damping performance of magnesium to improve equipment accuracy.

- Automatic lathe machining parts, fastener blanks, connector parts, with superior machinability to improve production efficiency and reduce processing costs.

6. Other Industrial Applications :

- Sports equipment: bicycle frame rods, golf club shafts, ski poles, hiking poles, and archery equipment parts, with ultra-lightweight and high strength to improve sports performance.

- Mold manufacturing: magnesium alloy mold blanks, with excellent thermal conductivity to shorten mold heating and cooling cycles and improve production efficiency.

- Textile machinery, printing machinery lightweight structural parts, reducing equipment inertia and improving operating speed and precision.

- Chemical industry reaction equipment parts, anti-corrosion engineering components, and electromagnetic shielding materials.

Q: What is the difference between pure magnesium sacrificial anode rod and magnesium alloy rod? How should I choose?

A: The core differences and selection guidelines are as follows:

- Sacrificial Anode Magnesium Rod (AZ63B, M1C) : Special alloy formula designed for cathodic protection, with optimized electrochemical activity, stable current output, high current efficiency (≥55%), and uniform corrosion rate. It complies with ASTM B843 standard, and is specially used for anti-corrosion of water heaters, pipelines, storage tanks, and marine facilities. We can provide ready-to-use products with copper-plated ends, welded cables, and epoxy coating.

- Magnesium Alloy Structural Rod (AZ31B, AZ80A, ZK60A ): Designed for structural machining and load-bearing applications, with optimized mechanical properties (strength, toughness, hardness), excellent machinability and formability. It is used for CNC machining parts, aerospace components, automotive parts, and forging blanks.Our technical team will recommend the most suitable alloy and specification according to your specific application scenario.

Q: What non-destructive testing do you perform on magnesium rods? Can you provide UT test reports?

A: We perform 100% non-destructive testing on all magnesium rods with diameter ≥10mm:

- Extruded and forged rods : Full-coverage ultrasonic flaw detection (UT) in strict accordance with ASTM E114 and EN 10228-3 standards, to detect internal defects such as porosity, cracks, inclusions, and delamination. The default delivery meets ASTM Grade A qualification, and Grade B/C ultra-high standard products can be provided for aerospace and medical applications.

- Precision small-diameter rods : Eddy current testing (ECT) is available for surface defect detection.

For special requirements, we can provide penetrant testing, X-ray testing, and other non-destructive testing services.Each order will be provided with a complete UT test report and Material Test Report (MTR), and third-party SGS/TUV testing certification can also be provided.

Q: What is your minimum order quantity (MOQ) for magnesium rods? Can you provide free samples?

A: We have a very flexible MOQ to meet your different needs:

- For standard in-stock specifications (AZ31B conventional diameter): 1 piece minimum order, supporting sample orders and small batch trial production.

- For custom sizes, custom grades, and special surface treatment products: the MOQ is 50kg, which can be negotiated and reduced for special cases.

Free samples: We can provide small sample rods ≤200mm in length for free for you to test material properties, machining performance, and electrochemical activity, you only need to bear the international shipping cost; large-size samples or custom samples can be provided at cost price.

Q: Magnesium rods are easy to deform during CNC machining, how do you solve this problem?

A: We solve the deformation problem from the production source, and provide a full-process solution:

- Pre-stress relief before delivery : All our magnesium rods undergo multi-stage stress relief annealing before delivery, eliminating the internal stress generated during extrusion and forging, and reducing the deformation during processing from the root.

- Custom pre-treatment for high precision requirements : We can provide customized services of rough machining + secondary stress relief treatment to further release the internal stress of the rod.

- Processing process guidance : We will provide detailed machining process guidelines with the goods, such as using small cutting amount, multi-pass processing, reasonable selection of cutting tools and cutting parameters, using coolant to cool down, and reasonable clamping methods, to minimize processing deformation.

- Uniform structure performance : Our magnesium rods adopt advanced homogenization treatment, the performance difference between the longitudinal and transverse directions of the whole rod is ≤10%, the deformation amount in all directions is uniform during processing, and the accuracy is easier to control.

Q: What international standards do your magnesium rods comply with? Can they be exported to Europe and the United States?

A: Our magnesium rods are produced in strict accordance with international mainstream standards, including ASTM B107 (American Standard for Magnesium Alloy Bar and Rod), ASTM B843 (Standard for Magnesium Alloy Sacrificial Anodes), AMS 4375 (Aerospace Material Specification), ISO 3116 (International Standard), and EN 1753 (European Standard). The products fully comply with EU REACH, RoHS environmental protection standards, US FDA food contact standards, and ISO 13485 medical device standards. We have self-operated import and export rights, and have been exported to more than 50 countries and regions including the United States, Germany, the United Kingdom, France, Canada, and Australia for a long time. We are familiar with the customs clearance requirements of various countries and can provide a full set of customs clearance documents.

Q: What is the delivery time of your magnesium rods? Can you provide expedited production?

A: The delivery time is distinguished according to the order type:

- Standard in-stock specifications (conventional diameter of AZ31B, AZ80A): delivery within 3-7 days after payment confirmation.

- Custom size, non-stock products of conventional grades: delivery within 10-15 days.

- Custom alloy grades, special heat treatment, and large batch orders (≥10 tons): delivery within 15-25 days.

- Urgent orders: We have a dedicated expedited production line, which can shorten the delivery time to 2-5 days for small batch urgent orders, to meet your project progress needs.

Q: What surface treatments do you offer for magnesium rods? Can they be used in marine/outdoor environments?

A: We provide a full range of surface treatment solutions to meet different environmental requirements:

- Basic finish : As-extruded, pickled bright, precision ground polished surface, suitable for subsequent machining and indoor applications.

- Anti-oxidation treatment : Chemical passivation, low cost, suitable for indoor storage and subsequent welding/machining.

- Medium corrosion resistance : Anodizing (AAO), 200+ hours of neutral salt spray resistance, suitable for general outdoor applications.

- High corrosion resistance : Micro-arc oxidation (MAO), forming a dense ceramic layer on the surface, passing more than 500 hours of neutral salt spray test, suitable for harsh outdoor and industrial environments.

- Extreme environment protection : MAO + sealing + fluorocarbon spraying composite treatment, passing more than 1000 hours of neutral salt spray test, fully meeting the use requirements of marine and offshore engineering.For marine and outdoor applications, we recommend WE43 rare earth magnesium alloy + MAO composite treatment, which has far better corrosion resistance than ordinary AZ31B magnesium alloy.

Q: Can magnesium rods be welded and forged? Do you provide process guidance?

A: Yes, our magnesium rods have excellent welding and forging performance:

- Welding : The recommended welding process is AC TIG tungsten inert gas welding (most commonly used) and MIG welding, using high-purity argon (≥99.99%) for protection, and matching the same grade of magnesium welding wire to avoid oxidation and porosity. We can provide matching magnesium welding wire and detailed welding parameter guidelines.

- Forging : Annealed (O-temper) rods have excellent forgeability, with a recommended forging temperature of 300-400℃. Our ZK60A and AZ80A forged bars are specially designed for forging applications, with uniform structure and excellent formability, no cracking during forging.We provide detailed forging and welding process manuals, and one-on-one technical support with each order. We can also provide custom forging services according to your drawings.

Q: Do you have medical-grade magnesium rods? What certifications do you have?

A: Yes, we have professional medical-grade magnesium rods, mainly WE43 and AZ31B medical grade alloys. Our medical-grade magnesium rods are produced in a 100,000-level clean workshop, in strict accordance with ISO 13485 medical device quality management system standards, with ultra-low impurity content (heavy metal content meets medical standards), uniform microstructure, and excellent biocompatibility. We can provide ISO 13485 certification, biocompatibility test reports, and third-party sterilization services, which are widely used in biodegradable bone fixation implants, medical stents, and surgical instruments.

Q: What payment terms do you accept for international orders?

A: We accept standard international trade payment terms:

- T/T (Telegraphic Transfer): 30% deposit in advance, 70% balance before shipment.

- Irrevocable L/C at sight for bulk orders over 50,000 USD.

- Alibaba Trade Assurance (100% payment protection for buyers).

- For long-term cooperative partners with good credit, we can offer more flexible payment terms.

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