Fotric 326 - Appendices and Supporting Data; Appendix A: Emissivity Table

28
Emissivity Table
（For reference only）
Material
Name
Surface Condition
Temperature
(℃）
Emissivity
(ε）
Aluminum
Non-oxidized 100 0.20
Oxidized 100 0.55
Brass
Polished brown 20 0.40
Unpolished 38 0.22
Oxidized 100 0.61
Copper Severely oxidized 20 0.78
Iron
Oxidized 100 0.74
Rusty
25 0.65
Cast iron
Oxidized 200 0.64
Non-oxidized 100 0.21
Wrought
iron
Roughened 25 0.94
Polished 38 0.28
Nickel Oxidized 200 0.37
Stainless
steel
Oxidized 60 0.85
Steel Oxidized at 800
℃
200 0.79
Appendix A