High-strength nickel copper alloy nuts for marine and chemical industries.
ASTM F467/F467M Grade N05500 Alloy 500 Nuts provide superior corrosion resistance, mechanical strength, and durability in marine and offshore environments.
| UNS Designation Number | Alloy | General Name | Al | C, max | Cr | Cu A | Fe, max | Mn, max | Ni A | P, max | Si, max | Ti | Co, max | Mo | S, max | V | W | Cb † |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ASTM F467/F467M Grade N05500 | 500 | Ni-Cu-Al | 2.30- 3.15 | 0.25 | . . . | balance | 2.0 | 1.5 | 63.0- 70.0 | . . . | 0.5 | 0.35- 0.85 | B | . . . | 0.01 | . . . | . . . | . . . |
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| Alloy | Mechanical Property Marking | Hardness, min A | Proof Stress, Hex Nut min, ksi | Proof Stress, Heavy Hex Nut min, ksi B |
|---|---|---|---|---|
| ASTM F467 Alloy Ni 500 | F 467W | 24 HRC | 130 | 140 |
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| Alloy | Mechanical Property Marking | Hardness, min A | Proof Stress, Mpa |
|---|---|---|---|
| ASTM F467M Ni 500 | F467MW | 24 HRC | 900 |
| Nominal Size, in. | Coarse Threads-UNC | Fine Threads-UNF | 8 Thread Series-8UN | |||
|---|---|---|---|---|---|---|
| Threads/in. | Stress Area A, in 2 | Threads/in. | Stress Area A, in 2 | Threads/in. | Stress Area A, in 2 | |
| 1/ 4 | 20 | 0.0318 | 28 | 0.0364 | . . . | . . . |
| 5/ 16 | 18 | 0.0524 | 24 | 0.0580 | . . . | . . . |
| 3/ 8 | 16 | 0.0775 | 24 | 0.0878 | . . . | . . . |
| 7/ 16 | 14 | 0.1063 | 20 | 0.1187 | . . . | . . . |
| 1/ 2 | 13 | 0.1419 | 20 | 0.1599 | . . . | . . . |
| 9/ 16 | 12 | 0.1820 | 18 | 0.2030 | . . . | . . . |
| 5/ 8 | 11 | 0.2260 | 18 | 0.2560 | . . . | . . . |
| 3/ 4 | 10 | 0.3340 | 16 | 0.3730 | . . . | . . . |
| 7/ 8 | 9 | 0.4620 | 14 | 0.5090 | . . . | . . . |
| 1 | 8 | 0.6060 | 12 | 0.6630 | . . . | . . . |
| 1 1/ 8 | 7 | 0.7630 | 12 | 0.8560 | 8 | 0.790 |
| 1 1/ 4 | 7 | 0.9690 | 12 | 1.0730 | 8 | 1.000 |
| 1 3/ 8 | 6 | 1.1550 | 12 | 1.3150 | 8 | 1.233 |
| 1 1/ 2 | 6 | 1.4050 | 12 | 1.5810 | 8 | 1.492 |
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| Nominal Nut Diameter and Thread Pitch | Stress Area, Amm 2 | Nominal Nut Diameter and Thread Pitch | Stress Area, Amm 2 |
|---|---|---|---|
| M6 × 1 | 20.1 | M16 × 2 | 157 |
| M8 × 1.25 | 36.6 | M20 × 2.5 | 245 |
| M10 × 1.5 | 58.0 | M24 × 3 | 353 |
| M12 × 1.75 | 84.3 | M30 × 3.5 | 561 |
| M14 × 2 | 115 | M36 × 4 | 817 |
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Except as provided in 4.2.3, nuts are furnished in the condition below (4.2.2). When required, stress relieving is specified by the purchaser for all copper alloys and nickel alloys 400 and 405 (4.2.3). Unless otherwise specified, nuts may be hot pressed, cold formed or machined at the manufacturer's option (4.2.1).
| Alloy | Condition |
|---|---|
| Copper (all alloys) | As formed or stress relieved at manufacturer's option |
| Nickel alloys 400 and 405 | As formed or stress relieved at manufacturer's option |
| Nickel alloy 500 | Solution annealed and aged |
| Aluminum alloy 2024-T4 | Solution treated and naturally aged |
| Aluminum alloy 6061-T6 | Solution treated and artificially aged |
| Aluminum alloy 6262-T9 | Solution treated, artificially aged, and cold worked |
| Titanium 625 | Annealed |
UNS N05500 is alloy 500, listed in Table 1 of ASTM F467-13ε2 as Ni-Cu-Al. Key composition limits: nickel 63.0-70.0 %, aluminum 2.30-3.15 %, titanium 0.35-0.85 %, copper balance. Nickel alloy 500 nuts are furnished solution annealed and aged (4.2.2). Supplementary Requirement S4 (heat control) applies to alloys 400, 405 and 500 only: product controlled by heat analysis and identified by actual heat number, with S2 lot testing invoked automatically. Nickel alloy raw material is covered by ASTM B574 (4.1.1).
Table 2 requires a minimum hardness of 24 HRC and a minimum proof stress of 130 ksi for hex nuts and 140 ksi for heavy hex nuts. Heavy hex values are 1.08 times the hex nut value (note B). Where both proof load and hardness are tested, proof load governs acceptance (6.2).
Proof load is the Table 2 proof stress times the Table 4 tensile stress area (13.2.1, tested per ASTM F606). For 1/2-13 UNC the stress area is 0.1419 sq in, so a hex nut must carry 18,447 lbf (130 ksi) and a heavy hex nut 19,866 lbf (140 ksi) without failure.
Each nut carries the manufacturer's symbol and the Table 2 marking F 467W, raised or depressed (17.1). Unless otherwise specified, dimensions are to ASME B18.2.2 (7.1), threads are Class 2B to ASME B1.1 (7.2) and nuts are furnished without any additive chemical or metallic finish (8.2). Mating bolts, cap screws and studs are covered by ASTM F468 (1.2).
