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Molybdenum (Mo) Squares


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Heeger Materials (HM) is a trusted supplier of pure Molybdenum (Mo) Squares. We offer Molybdenum Squares in various sizes. Other shapes are also available upon request.

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Data sheet

MaterialsMolybdenum metal/TZM/MoLa Alloy
StandardASTM B386

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Molybdenum Squares includes pure molybdenum Squares and coated molybdenum. Coated molybdenum Squares is PVD or evaporation with Ruthenium (Ru), Rhodium (Rh), Nickel (Ni), Silver (Ag), Gold (Au), etc. Molybdenum Squares are widely used as contact materials in silicon-controlled rectifier diodes, transistors, and thyristors. Molybdenum has similar coefficients of thermal expansion (CTE) to silicon combined with moderate thermal conductivity and is therefore appropriate for large area power devices where considerable heat is generated. Additional applications include the utilization of molybdenum as heat sink bases in IC’s, LSI’s, and hybrid circuits.

Molybdenum Squares Specifications


Molybdenum Squares


Thickness: 0.01 mm – 3.0+ mm (0.0004” – 1.2” +)

Width/Length: 0.50 mm – 200.0 mm (0.02” – 7.8” +)


flatness<0.005mm, Parallelism<0.01mm,

Ra<0.063mm, tolerance: ±0.025mm.


Molybdenum or Molybdenum alloy including Pure Molybdenum (Type 361), Molybdenum TZM (Type 364), Mo-Lanthanoxid (ML), and Drawing grade




99.95%, 99.99%


Ru, Rh, Ni, Ag, Au, etc.

Molybdenum Squares Applications

  • Silicon Controlled Rectifiers Diodes
  • Transistors
  • Thyristors (GTO ‘s)
  • Heat Sink Bases in IC’s, LSI’s and Hybrid Circuits                  

Molybdenum and Molybdenum Alloy ASTM Grade:

  • Molybdenum 361—Unalloyed powder metallurgy molybdenum
  • TZM Molybdenum Alloy 364—Powder metallurgy molybdenum-0.5 % titanium-0.1 % zirconium (TZM) alloy
  • Mo-Lanthanoxid (ML)-Doped La2O3 at 0.3 %, 0.7% or 0.03%
  • Drawing Grade—A drawing grade is defined, which may be specified as a separate requirement by the purchaser

Molybdenum Squares Order Info

Orders for material under this specification shall include the following information:

  • Quantity (weight, number of pieces, or other suitable measures of quantity)
  • ASTM grade (See above Molybdenum and Molybdenum Alloy ASTM Grade)
  • Dimensions (Width, length, and thickness)
  • Coating, if any
  • Additions to the specification and supplementary requirements, if any

Molybdenum Squares Packing

Our Molybdenum Squares are carefully handled to prevent damage during storage and transportation and to preserve the quality of our product in its original condition. Products will be packed in wooden cases supported with soft materials to ensure that the products thus packed will not shift inside the cases.   

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