Group B Refracotry Metal Composite Materials Alloy Number Rockwell Hardness

Electrical Conductivity

%IACS [Ms/m]

Ultimate Compressive Strength¹
Minimum Minimum ksi [Mpa]
Class 10 N/A2 72 HRB 45% [26] 135 [930]
Class 11 ASTM B702 C1D 94 HRB 40% [23] 160 [1103]
Class 12 ASTM B702 C1E 98 HRB 38% [22] 170 [1172]
Class 13 N/A 69 HRA 30% [17.4] 200 [1379]
Class 14  ASTM B387 Type 360 85 HRB 30% [17.4] 88 [607]

Notes:

1. For information only

2. Not Assigned

3. The conductivity and hardness noted may differ from ASTM standards

 

Reference:

  • American Welding Society Publication J1.3