I-70-H Beryllium Instrument Grade

Alternative and trade names
I-70-H

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Description

I-70-H grade beryllium consists of 99% beryllium with a maximum of 0.7% beryllium oxide. Low oxide grades allow for bare beryllium mirrors to yield a lower level scatter and to polish easier than higher oxide grades. I-70-H grade beryllium metal is stable over a wide range of temperatures from -196°C to 226°C (-321°F to 440°F) and offers superior reflectivity in the far infrared region (98.5% at 8-12 micron wavelengths) without optical coatings. This IR reflectivity enables designers to create defense applications that are more difficult to detect.

This material data has been provided by Materion Brush GmbH.

"Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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Properties

General

Property	Temperature	Value	Comment
Density	23.0 °C	1.85 g/cm³ Show Supplier Material materials with Density of 1.85 g/cm³	Theoretical density for BeO: 0.7%
Grain size		12 μm Show Supplier Material materials with Grain size of 12 μm	max., ASTM E-112

Mechanical

Property	Temperature	Value	Comment
Elongation	23.0 °C	2 % Show Supplier Material materials with Elongation of 2 %	in 4 diameters
Tensile strength	23.0 °C	345 MPa Show Supplier Material materials with Tensile strength of 345 MPa
Yield strength Rp0.2	23.0 °C	207 MPa Show Supplier Material materials with Yield strength Rp0.2 of 207 MPa

Chemical properties

Property	Value	Comment
Aluminium	0.07 % Show Supplier Material materials with Aluminium of 0.07 %	max.
Beryllium	99 % Show Supplier Material materials with Beryllium of 99 %	min., BeO: 0.7% max
Carbon	0.07 % Show Supplier Material materials with Carbon of 0.07 %	max.
Iron	0.1 % Show Supplier Material materials with Iron of 0.1 %	max.
Magnesium	0.07 % Show Supplier Material materials with Magnesium of 0.07 %	max.
Other	0.04 % Show Supplier Material materials with Other of 0.04 %	max., other metallic impurities each
Silicon	0.07 % Show Supplier Material materials with Silicon of 0.07 %	max.

Technological properties

Property
Application areas	It is hot isostatically pressed beryllium grades used in space applications and for low-density, bare polished optical applications or when reduced weight is required. These grades offer high microyield strength allowing instrumentation to keep their form when exposed to stress. Beryllium metal is more resistant to changes in temperature extremes.

I-70-H Beryllium Instrument Grade

Description

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Applications

Materials by this supplier

Properties