ASTM B655 Grade R04295 soft annealed (+A)

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Description

Commercial niobium-hafnium alloy for bar, rod and wire.

Related Standards

This material data has been provided by WIAM.

"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

PropertyTemperatureValueComment

Density

23.0 °C

8.57 g/cm³

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Typical for Niobium

Mechanical

PropertyTemperatureValueComment

Elastic modulus

23.0 °C

104 GPa

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Typical for Niobium

Elongation A25

20.0 °C

20 %

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1100.0 °C

20 %

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Poisson's ratio

23.0 °C

0.4 [-]

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Typical for Niobium

Shear modulus

23.0 °C

38 GPa

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Typical for Niobium

Tensile strength

20.0 °C

370 - 385 MPa

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1100.0 °C

145 MPa

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Yield strength Rp0.2

20.0 °C

260 - 275 MPa

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1100.0 °C

110 MPa

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Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

23.0 °C

6.8E-6 - 1.4E-5 1/K

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Typical for Niobium

Melting point

2468 °C

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Typical for Niobium

Specific heat capacity

23.0 °C

201 - 272 J/(kg·K)

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Typical for Niobium

Thermal conductivity

23.0 °C

53 - 54 W/(m·K)

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Typical for Niobium

Chemical properties

PropertyValue

Carbon

0.015 %

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Hafnium

9 - 11 %

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Hydrogen

1.5E-3 %

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Nitrogen

0.01 %

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Oxygen

0.03 %

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Tantalum

0.5 %

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Titanium

0.7 - 1.3 %

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Tungsten

0.5 %

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Zirconium

0.7 %

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