ASTM A193 grade B8M Class 2 is a 316 stainless steel fastener that is also corrosion-resistant. These fasteners are used in creating bolts, studs, screws, threaded rods, and many more. You can find its application in many high tensile,
temperature, and special purpose applications like chemical and petroleum construction.
A193 Grade B8M Class 2
| B8M Class 2 |
Stainless steel, AISI 304, carbide solution treated, strain hardened |
Mechanical properties
| Size |
Tensile ksi, min |
Yield ksi, min |
Elong %, min |
RA % min |
HBW |
Rockwell |
| Up to 3/4 |
110 |
95 |
15 |
45 |
321 Max |
35 HRC max |
| 7/8 - 1 |
100 |
80 |
20 |
45 |
| 1-1/8 - 1-1/4 |
95 |
65 |
25 |
45 |
| 1-3/8 - 1-1/2 |
90 |
50 |
30 |
45 |
Chemical properties
| Element |
B8M (AISI 316) |
| Carbon |
0.08% max |
| Manganese |
2.00% max |
| Phosphorus, max |
0.045% |
| Sulfur, max |
0.03% |
| Silicon |
1.00% max |
| Chromium |
18.0 - 20.0% |
| Nickel |
8.0 - 11.0% |
| Molybdenum |
2.00 - 3.00% |
Compatible hardware
| Bolt Grade |
Nut |
Washers |
| B8M Class 2 |
A194 Grade 8M |
SS316 |
