Automotive Magnesium alloy round bar
- Product Description
Automotive Magnesium Alloy Round Bar - Precision Engineered for Vehicle Lightweighting
When you're sourcing materials for automotive lightweighting, the Automotive Magnesium alloy round bar from HAGRIEN delivers measurable performance. Our extruded round bars reach diameters up to Ø300 mm with strict dimensional tolerance control, density of 1.78–1.83 g/cm³, and tensile strength ranging from 240–320 MPa. Backed by our closed-loop manufacturing system—from alloy melting to extrusion and precision machining—we ensure uniform microstructure, repeatable mechanical properties, and full batch traceability. With 7+ years of continuous production experience and CNAS-accredited testing, you get audit-ready documentation (COA/COC/SDS) and predictable lead times: 2–4 weeks for standard sizes, 4–8 weeks for custom specifications.

What Makes Our Magnesium Alloy Round Bars Different?
Engineered for Real-World Automotive Demands
You need materials that perform consistently under demanding conditions. Our round bars are formulated with alloying elements like Aluminum (Al), Zinc (Zn), and Manganese (Mn)—such as AZ31B, AZ61, and ZK60 grades—optimized for your specific application requirements.
Key properties you can rely on:
- Density: 1.78–1.83 g/cm³ (33% lighter than aluminum)
- Tensile Strength: 240–320 MPa
- Thermal Conductivity: 100–160 W/m·K
- Damping Capacity: 10× superior to aluminum
These specifications translate directly to weight savings, improved fuel efficiency, and enhanced vibration control in your finished components.
Large-Diameter Capability with Zero Compromise
We produce extruded products up to Ø300 mm—one of the largest in the industry.
This capability matters because:
- Fewer welding joints mean stronger structural integrity
- Reduced machining waste lowers your material costs
- Uniform grain structure throughout the diameter ensures predictable behavior during CNC operations
Our strict process discipline controls microstructure consistency from surface to core. You get repeatable machining performance, batch after batch.
From Raw Alloy to Finished Component—All Under One Roof
Your supply chain risk decreases when fewer handoffs occur. HAGRIEN's integrated manufacturing covers:
- Alloy Design – Custom formulations based on your operating environment
- Melting & Casting – Controlled metallurgy for composition accuracy
- Extrusion – Precision forming up to Ø300 mm
- Machining Coordination – Support for drawing-based production
- Quality Verification – HTHP lab testing and documentation
This vertical integration means faster communication, shorter lead times, and accountability at every production stage.

Technical Specifications
Item | Unit | AZ31B | AZ61A | AZ91D |
Density | g/cm³ | 1.77 | 1.80 | 1.81 |
Melting Point | ℃ | 566- 632 | 620- 630 | 470- 595 |
Tensile Strength | MPa | 255- 290 | 290- 315 | 230- 250 |
Yield Strength | MPa | 150- 200 | 170- 220 | 150- 170 |
Elongation | % | 12-21 | 10-16 | 3-5 |
Elastic Modulus | GPa | 45 | 45 | 45 |
Poisson’s Ratio | — | 0.32 | 0.31 | 0.32 |
Thermal Expansion Coefficient | 10⁻⁶ /℃ | 26 | 26 | 26 |
Thermal Conductivity | W/(m·K) | 70 | 65 | 50 |
Specific Heat Capacity | J/(kg·K) | 1000-1050 | 1050 | 1050 |
Electrical Resistivity | μΩ·cm | 92- 125 | 125 | 170 |
Brinell Hardness | HB | 56-73 | 60-70 | 63-90 |
Shear Modulus | GPa | 17 | 17 | 17 |
Fatigue Strength | MPa | 80- 110 | 90- 120 | 70- 100 |
Where You'll Use These Round Bars
Powertrain & Drivetrain Components
Your engineers machine our round bars into:
- Transmission valve bodies
- Engine mounting brackets
- Motor housings for EV powertrains
- Steering column supports
The low rotational inertia reduces energy loss. Thermal stability ensures dimensional accuracy under temperature cycling. Weight reduction directly improves fuel economy or extends EV range.
EV Battery Infrastructure
Battery packs are heavy. Every gram you save elsewhere adds range. Our round bars become:
- Structural support frames
- Heat dissipation rails
- Mounting brackets
The material's thermal conductivity (100–160 W/m·K) aids heat management. Its rigidity compensates for battery cell weight without adding mass.
Chassis & Interior Structural Safety
Crash safety demands energy absorption. Automotive Magnesium alloy round bars excel here:
- Seat frame cross-bars
- Steering wheel armatures
- Control arms
- Brake pedal supports
The alloy's damping capacity absorbs road-induced vibrations 10 times better than aluminum. In collision scenarios, the ductility and impact resistance protect occupants while maintaining structural integrity.

Why Global Buyers Trust HAGRIEN?
Consistent Quality, Repeatable Results
You can't afford batch-to-batch variation. Our process control ensures:
- Uniform grain size distribution
- Predictable mechanical properties
- Stable machinability across production runs
This consistency reduces your machining scrap rate and shortens qualification cycles.
Full Traceability & Audit Readiness
Every batch includes:
- Certificate of Analysis (COA)
- Certificate of Conformance (COC)
- Safety Data Sheet (SDS)
- Inspection records with batch traceability
Our CNAS-accredited lab provides test data your quality team needs for supplier audits.

Predictable Lead Times
Standard round bars ship in 2–4 weeks. Custom specifications take 4–8 weeks. We maintain safety stock for common sizes and offer expedited delivery when your production schedule demands it.
Engineering Support for Custom Applications
Not sure which alloy grade fits your application? Our team provides:
- Material selection guidance based on operating conditions
- Drawing-based production support
- Prototype development and scaling
- Factory Acceptance Testing (FAT) coordination
We help you move from concept to volume production with minimal trial-and-error.
Exhibition

Frequently Asked Questions
What is the item basically utilized for?
The item is basically utilized for car lightweight auxiliary parts, lodgings, and machined components. Buyers more often than not need to know whether the item can meet the target working condition, machining course, and last application prerequisite without making pointless downstream hazard. Our designing group surveys your determinations and prescribes the suitable combination review and breadth to coordinate your execution targets.
What key highlights ought to buyers assess when sourcing the product?
Buyers ought to assess combination review consistency, dimensional resilience, surface quality, and machining execution, additionally mass lessening potential and handle consistency for rehash generation. In send out obtaining, these variables matter since they specifically influence handling surrender, field unwavering quality, item consistency, and the add up to fetched of capability. We give total fabric certifications and machining rules to offer assistance your group evaluate fit some time recently committing to volume orders.
Why do universal buyers select Hagrien for the product?
HAGRIEN combines combination softening, expulsion, machining coordination, and quality control to back both standard supply and custom lightweight component improvement. This makes a difference clients decrease reliance on a single provider, make strides communication speed, and move from test approval to steady volume supply more effectively. Our U.S. nearness empowers responsive communication adjusted with North American plans, and we react to RFQs inside 24 hours.
Can you handle large-diameter requirements?
Yes. We expel circular bars up to Ø300 mm with controlled microstructure and dimensional solidness. This capability is uncommon in the industry and disposes of the require for welding littler segments together, which progresses basic execution and decreases your creation costs.
Do you support custom alloy formulations?
Absolutely. If standard grades like AZ31B or ZK60 don't meet your performance criteria, our metallurgy team can develop custom formulations. We design alloy systems based on your operating temperature, corrosion environment, and required dissolution rate (for dissolvable applications). Prototyping and testing occur in our CNAS-accredited lab before scaling to production.
What documentation do you provide for supplier qualification?
Every shipment includes COA, COC, SDS, dimensional inspection reports, and batch traceability documents. These records support your internal audits and regulatory compliance requirements. We also offer Factory Acceptance Testing (FAT) and can coordinate third-party inspections if your procurement process requires them.
Production Advantages You Can Count On
100% Recyclable & Sustainable
Magnesium alloys are fully recyclable. Choosing our round bars supports your corporate sustainability goals and helps meet increasingly strict emissions regulations.
Superior Machinability
Lower cutting forces mean reduced tool wear and faster cycle times. Your CNC operations become more efficient, lowering per-part costs.
Excellent Damping Properties
Vibration and noise reduction improve passenger comfort. This matters especially for premium vehicle segments and electric vehicles where engine noise no longer masks road vibrations.
Proven Supply Reliability
Since 2019, we've maintained continuous production with zero supply interruptions. Our in-house control of critical processes and safety stock for standard sizes protect your production schedule.

Ready to Reduce Weight and Improve Performance?
Contact our engineering team today at cyrus@us-hagrien.com to discuss your specific requirements and receive a detailed quotation for Automotive Magnesium alloy round bar.
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