This table shows the mechanical properties of B7, Grade 5 and Grade 8:
| GRADE | GRADE 5 | ASTM A193 B7 (Chromium Molybdenum) |
GRADE 8 (Heat Treated After Threading) |
| TENSILE STRENGTH | 120,000 PSI minimum |
125,000 PSI minimum 1,100°F tempering temp |
150,000 PSI minimum |
| YIELD STRENGTH | 92,000 PSI minimum |
105,000 PSI minimum minimum |
130,000 PSI minimum |
| ROCKWELL HARDNESS | C25-C34 | C26-C32 | C33-C39 |
