Magnesium Alloy
AZ31B, AZ61A, AZ80A, AZ91D and ZK60A magnesium alloy in sheet, plate, round bar, extrusion and tooling-plate form — ASTM B90 / B107 / B91 with mill certificates.
What is magnesium alloy?
Magnesium alloys are the lightest structural metals, with a density of about 1.74 g/cm³ — roughly 35% lighter than aluminium and 75% lighter than steel — while offering good specific stiffness, machinability and vibration damping. AZ31B sheet and plate is the general-purpose wrought grade; AZ91D is the standard die-casting alloy and ZK60A the high-strength extrusion alloy.
Steelco Metal & Alloys supplies magnesium alloy from Mumbai in sheet, plate, cast tooling plate, round bar and extruded sections, cut to size for aerospace, automotive, electronics and tooling applications. Every dispatch leaves our Mumbai warehouse with an EN 10204 3.1 mill test certificate (3.2 with TUV, SGS, BV, Lloyd's or IRS witness on request), PMI verification and full heat-number traceability.
Magnesium alloy grades we stock.
Wrought, cast and extrusion grades supplied against project schedules.
Magnesium Alloy we hold in ready stock.
AZ31B sheet & plate
0.5 – 100 mm, H24 and O temper to ASTM B90.
Cast tooling plate
Stress-relieved plate for jigs, fixtures and vacuum forming tools.
Round bar
Ø 10 – 250 mm AZ31B, AZ61A and AZ80A to ASTM B107.
Extruded sections
Angles, channels, tubes and profiles in AZ31B and ZK60A.
AZ91D ingot
Die-casting ingot for high-pressure casting.
Anodes
Magnesium sacrificial anodes for cathodic protection.
Use our free metal weight calculator — bars, sheets, plates, pipes and sections.
Our magnesium range
Ready stock across every mainstream form — dispatched with mill test certificates and full traceability from our Mumbai warehouse.
Sheet & Plate
0.5 – 100 mm AZ31B, H24 and O temper.
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Tooling Plate
Cast and stress-relieved for jigs and fixtures.
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Round Bar
Ø 10 – 250 mm extruded bar.
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Extrusions
Angles, channels, tubes and custom profiles.
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Ingot
AZ91D die-casting ingot.
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Anodes
Sacrificial anodes for cathodic protection.
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Machined Parts
Lightweight housings and brackets to drawing.
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Welding Consumables
ER AZ61A and ER AZ92A filler wire.
ExploreMagnesium Alloy specifications.
Standards, sizes, thickness and condition we routinely supply across every product form.
| Product | Size Range | Thickness / Wall | Finish / Condition | Standards |
|---|---|---|---|---|
Sheet | Up to 1250 mm wide | 0.5 – 6 mm | H24 / O temper | ASTM B90 |
Plate | Up to 1500 mm wide | 6 – 100 mm | Stress relieved | ASTM B90 / AMS 4377 |
Round Bar | Ø 10 – 250 mm | — | Extruded, machined | ASTM B107 |
Extrusions | To section drawing | 2 – 50 mm | Mill finish | ASTM B107 |
Ingot | Standard ingot | — | As cast | ASTM B93 / B94 |
Note: Machining should use flood coolant and sharp tooling; swarf must be handled per fire-safety guidance.
Where magnesium alloy is used.
Aerospace
Housings, brackets, gearbox casings and interior structures.
Automotive & EV
Steering wheel armatures, instrument panel beams and battery housings.
Tooling & Jigs
Cast tooling plate for lightweight fixtures and vacuum forming tools.
Electronics
Laptop, camera and instrument housings needing EMI shielding.
Cathodic Protection
Sacrificial anodes for tanks, pipelines and water heaters.
Printing
Photoengraving sheet for embossing and stamping dies.
Frequently asked questions.
Answers to the questions our Mumbai desk is asked most often.
How light is magnesium compared with aluminium?
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Magnesium has a density of about 1.74 g/cm³ against 2.70 g/cm³ for aluminium, so a like-for-like part is roughly 35% lighter. Because magnesium is less stiff, sections are usually thickened slightly, which typically returns a net weight saving of 15–25% in practice.
Is magnesium a fire risk when machining?
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Solid magnesium sections are difficult to ignite, but fine swarf and dust are flammable. Machining should use sharp tooling, high feed rates, flood coolant that is not water-based where possible, and swarf must be collected in covered steel bins with Class D extinguishing media available.
Which magnesium alloy should I use for tooling plate?
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Cast and stress-relieved AZ31B tooling plate is the standard choice. It machines faster than aluminium, is dimensionally stable after stress relief, and cuts the weight of large jigs, drill fixtures and vacuum-forming tools significantly.
Every dispatch is traceable, tested and certified.
Material is supplied with EN 10204 3.1 (3.2 on request) mill test certificates, PMI and spectro verification, and is open to third-party inspection by TUV, SGS, BV, Lloyd’s and IRS from our Mumbai warehouse.
EN 10204 3.1 / 3.2
Mill test certificate with every consignment.
PMI & Spectro
Positive material identification before dispatch.
Third-party Inspection
TUV · SGS · BV · Lloyd's · IRS welcome.
Export Documentation
Full set prepared for 40+ countries.
Other grades you may also need
Ready to price your requirement?
Share your grade, form, size and quantity — our Mumbai desk responds with pricing, stock position and lead time, usually the same working day.