This ASTM A320 grade L7M segment includes details of fasteners made from stainless and alloy steel. These fasteners are primarily used in various low-temperature applications in the form of forged, hardened, rolled bars, bolts, screws,
and studs.
Below we have mentioned the grades that fall under A320
A320 Grade L7M
| L7M |
Chromium, Molybdenum, Alloy Steel Quenched and tempered |
Mechanical properties
| Grade |
Size |
Tensile ksi, min |
Yield ksi, min |
Elong %, min |
RA % min |
HBW |
Rockwell |
| L7M |
Up to 2-1/2 |
100 |
105 |
16 |
50 |
321 Max |
35 max |
Chemical properties
| Element |
L7M |
| Carbon |
0.38 - 0.48% |
| Manganese |
0.75 - 1.00% |
| Phosphorus, max |
0.035% |
| Sulfur, max |
0.040% |
| Silicon |
0.15 - 0.35% |
| Chromium |
0.80 - 1.10% |
| Nickel |
- |
| Molybdenum |
0.15 - 0.25% |
Related hardware
| Bolt Grade |
Nut |
Washers |
| L7M |
A194 Grade 7M |
F436 |
