ASTM A194 Grade 2H alloy steel Quenched and tempered plain with oil heavy hex nuts
There are different types such as the 2h heavy hex nut which is used for heavy duty applications,The material of the nuts could be carbon steel, alloy steel or other stainless steel types. They come under the standard ANSI B18.2.2. . The nuts range from ¼ inches to 4 inches in nominal size and have up to 175ksi proof load stress. The astm a563 dh heavy hex nuts have minimum of 248 hardness score. The material of these nuts can contain carbon, manganese, phosphorus, sulfur, silicon, chromium, nickel and molybdenum based on the material grade.
SIZE: 1/4" - 4", M6 -M100 .
STANDARD: ASME B18.2.2
THREAD: ASME B1.1 , UNC, UNF, UN8
FINISHED: Plain, Zinc Plated(Clear/Blue/Yellow/Black), Black oxide, Nickel, Chrome, H.D.G.
A194 Grade 2:Carbon steel heavy hex nuts.
A194 Grade 2H:Quenched and tempered carbon steel heavy hex nuts.
A194 Grade 7:Quenched and tempered alloy steel heavy hex nuts.
A194 Grade 7L:Quenched and tempered alloy steel heavy hex nuts, Charpy impact tested.
A194 Grade 8:Stainless AISI 304 heavy hex nuts.
A194 Grade 8M:Stainless AISI 316 heavy hex nuts.
NOTE: There are other grades of A194. Those listed here are the ones we receive the most requests for. For information on other types, Please contact us.
| A194 CHEMICAL PROPERTIES |
| Element | 2, 2H | 7 | 8 (AISI 304) | 8M (AISI 316) |
| Carbon | 0.4% min | 0.37 - 0.49% | 0.08% max | 0.08% max |
| Manganese | 1.0% max | 0.65 - 1.1% | 2.0% max | 2.0% max |
| Phosphorus, max | 0.04% | 0.04% | 0.05% | 0.05% |
| Sulfur, max | 0.05% | 0.04% | 0.03% | 0.03% |
| Silicon | 0.40% max | 0.15 - 035% | 1.0% max | 1.0% max |
| Chromium | | 0.75 - 1.2% | 18.0 - 20.0% | 16.0 - 18.0% |
| Nickel | | | 8.0 - 11.0% | 10.0 - 14.0% |
| Molybdenum | | 0.15 - 0.25% | | 2.0 - 3.0% |
| A194 MECHANICAL PROPERTIES |
| Grade | Marking | Size | Tempering Temp.Fahrenheit | Proof Load Stress, ksi | Hardness Brinell |
| Min | Max |
| 2 | 2 | 1/4" - 4" | 0 | 150 | 159 | 352 |
| 2H | 2H | 1/4" - 1-1/2" | 850 | 175 | 248 | 327 |
| 2H | 2H | 1-1/2" - 4" | 850 | 175 | 212 | 327 |
| 7 | 7 | 1/4" - 4" | 1100 | 175 | 248 | 327 |
| 8 | 8 | 1/4" - 4" | - | 80 | 126 | 300 |
| 8M | 8M | 1/4" - 4" | - | 80 | 126 | 300 |
Notes:
The markings shown for all grades of A194 nuts are for cold-formed and hot-forged nuts. When nuts are machined from bar stock, the nut must additionally be marked with the letter B. The letters H & M indicate heat-treated nuts.
Properties shown are those of coarse and 8-pitch thread heavy hex nuts.
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ASTM A194 Hex Head Nut Images
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