ASTM A194 Grade 4
| Grade | Description |
|---|---|
| 4 | Quenched & tempered carbon-molybdenum heavy hex nuts |
Mechanical Properties
Nut -Grade Identification Markings
All markings shown for all grades of A194 are for cold formed and for hot forged nuts. When nuts are machined from bar stock, the nut must additionally be marked with the letter "B"
| Grade Identification Markings | Specification | Material | Nominal Size, In. | Tempering Temp. °F | Proof Load Stress, ksi | Hardness Rockwell | See Note | |
|---|---|---|---|---|---|---|---|---|
| Min | Max | |||||||
 |
ASTM A194 Grade 4 | Medium Carbon Alloy Steel, Quenched and Tempered | 1/4 - 4 | 1100 | 175 | C24 | C38 | 1,2 |