Macor Machinable Glass Ceramic®

Macor® glass ceramic offers an outstanding combination of thermal, mechanical, electrical and chemical properties. Macor withstands high temperature up to 1000 ºC (no load) and demonstrates high electrical resistivity and dielectric strength. It can also be machined (using ordinary metal working tools) in intricate shapes and precision parts. And no post firing is required after machining. Macor is clean, offering zero porosity and no outgassing.

Macor standard stock items: rods, bars, sheets, discs
Macor Material Safety Data Sheet (MSDS) (pdf)

Material Specifications
Physical Properties Units Test Macor®
Chemical Formula   - glass ceramic
Density g/cm³ ASTM C20 2.52
Color - - white
Crystal Structure - - random
Water Absorption % ASTM C373 0.0
Hardness Moh's - 4.5
Hardness Knoop
(kg/mm1)		 Knoop 100g 250
Mechanical Properties

Units

Test

Macor®
Compressive Strength psi
MPa		 ASTM C773 345
Tensile Strength psi
MPa		 ACMA TEST# 4 90
Modulus of Elasticity
(Young's Mod.) 		psi x 106
GPa		 ASTM C848 66.9
Flexural Strength psi
MPa		 ASTM F417 94
Poisson's Ratio - ASTM C818 0.29
Fracture Toughness MPa x m1/2 Notched Beam 1.53
Thermal Properties

Units

Test

Macor®
Max. Use Temperature
(* denotes insert atm.) 		°F
°C		 No Load Cond. 1000
Thermal Shock Resistance DT (ºC) Quenching 25-100
Thermal Conductivity W/m.K ASTM C408 1.8
Coefficient of Linear
Thermal Expansion 		µm/m-°C
(~25°C though +/- 1000°C)		 ASTM C372 6.3-9.7
Specific Heat cal/g/°C ASTM C351 0.19
Electrical Properties

Units

Test

Macor®
Dielectric Constant 1Mhz @ R.T. ASTM D150 6.03
Dielectric Strength V/mil
kV/mm		 ASTM D116 40
Electrical Resistivity Wcm @ R.T. ASTM D182 >1017

The information supplied is not to be taken as a warranty or representation for which Technical Products, Inc. assumes legal responsibility, is offered solely for your consideration, investigation and verification. All risk of use, singly or in combination with other products, whether or not in accordance with the instructions, directions or suggestions is borne by the user.

Note: Technical Products, Inc. is one of the largest authorized Macor® distributors in the world.