Materials

Physical properties

Chemical properties

Other information

Melting Point (C)

Thermal Cycling

Rupture Stress

Oxidation

Nitration

Water Vapor

Mechanical Properties

Availability or in Use

Rhenium

(Re)

[34-37]

3160

Stable

1600 psi at 2500C run 10 hrs

Re₂O₇ at 600 C , melts at 297 C

Boil at 363 C Coating required

No reaction

Promote Oxidation

Excellent ductility.

Easy fab.

Easy welding

Widely used:

Rocket Chamber

Crystal Growth

Tantalium (ta) [34,37,38]

2996

Moderate

10 orders reduction at 1000 C

Starts at 250 C

Ta₂N at

2100 C

NA

Cold forming Easy fab.

Widely used. Mechanical parts

Tungsten (W)

[34,37-39]

3390

Moderate

2 orders reduction at 1000 C

Starts at 400 C and rapid oxidation at 500 C

WN₂ at 2300 C

Promote Oxidation at 500 C

Poor

ductility

Machine tools

Iridium (Ir) [34,35]

2455

Moderate

NA

At 1150 C

No reaction

NA

Excellent ductility

Crucibles

Crystal

growth