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    2. ASTM F467 Grade N06059

    ASTM F467/F467M Grade N06059 Alloy 59 Nuts Specification

    Nickel alloy nuts manufactured for aggressive industrial environments.

    ASTM F467/F467M Grade N06059 Alloy 59 Nuts deliver excellent resistance against chloride attack, oxidation, and chemical corrosion in demanding applications.

    ASTM F467/F467M Chemical Composition

    ASTM F467/F467M Nickel and Nickel-Base Alloys

    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 N06059 59 Ni- Cr-Mo 0.1- 0.4 0.010 max 22.0- 24.0 0.5 max 1.5 max 0.5 max balance 0.015 max 0.10 max . . . 0.3 max 15.0- 16.5 0.010 max . . . . . . . . .
    • (A) Elements shown as balance shall be arithmetically computed by deducting the sum of the other named elements from 100.
    • (B) Cobalt is to be counted as nickel.

    ASTM F467/F467M Mechanical Requirements

    ASTM F467/F467M Mechanical Requirements (Inch)

    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 59 Grade 1 F 467FN 21HRC 120 130
    ASTM F467 Alloy Ni 59 Grade 2 F 467GN 23HRC 135 146
    ASTM F467 Alloy Ni 59 Grade 3 F 467HN 25HRC 160 173
    ASTM F467 Alloy Ni 59 Grade 4 F 467JN 80HRB 100 108
    • (B) Proof stress values for heavy hex nuts are based on 1.08 times the value for corresponding regular hex nuts.

    ASTM F467M Mechanical Requirements (Metric)

    Alloy Mechanical Property Marking Hardness, min A Proof Stress, Mpa
    ASTM F467M Ni 59 Grade 1 F467FN 21HRC 825
    ASTM F467M Ni 59 Grade 2 F467GN 23HRC 930
    ASTM F467M Ni 59 Grade 3 F467HN 25HRC 1100
    ASTM F467M Ni 59 Grade 4 F467JN 80HRB 690

    ASTM F467/F467M Tensile Stress Areas and Threads per Inch

    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
    • (A) Tensile stress areas are computed using the following formula:
    • A s = 0.7854 [ D - 0.9743/n ]
      • where:
      • As = tensile stress area, in. 2 ,
      • D = nominal size (basic major diameter), in., and
      • n = number of threads per inch.

    ASTM F467/F467M Tensile Stress Areas and Threads per Metric

    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
    • (A) Tensile stress areas are computed using the following formula:
    • As = 0.7854 (D − 0.9382P) 2
      • where:
      • As = tensile stress area, mm. 2 ,
      • D = nominal size (basic major diameter), mm., and
      • n = number of threads per mm.

    ASTM F467/F467M Heat Treatment

    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

    Frequently Asked Questions

    What is Alloy 59 (N06059)?

    Alloy 59 is a high-purity Ni-Cr-Mo alloy (~23 Cr, ~16 Mo, ~1 Fe, balance Ni) with virtually no other intentional additions. Designed for severe chemical-process service - chlorides, sulfuric and phosphoric acids, oxidizing + reducing mixed media. Per ASTM F467 for nut in chemical-process equipment where C-276 or 625 are inadequate.

    How does Alloy 59 compare to Hastelloy C-276?

    Alloy 59 has higher Cr (23 vs 15-16 in C-276) and slightly higher Mo, giving better pitting + oxidizing-media resistance. The trade-off is somewhat lower resistance to localized reducing attack vs C-276 in some service. Pick Alloy 59 for mixed oxidizing/reducing chemistry; pick C-276 for predominantly reducing-acid service.

    Is Alloy 59 NACE MR0175 acceptable?

    Yes. N06059 is listed in NACE MR0175 / ISO 15156 for sour-service nut subject to the standard's hardness and condition requirements.

    What dimensional patterns are common in Alloy 59 bolts?

    Most demand is for ASME B16.5 full-thread flange studs and ASME B18.2.1 hex cap screws. TorqBolt supplies Alloy 59 across the full F467 dimensional range with mill certification including PMI confirmation of high-purity chemistry.

    References & Standards

    • ASTM F467 / F467M - Standard Specification for Nonferrous Nuts for General Use
    • ASTM F468 / F468M - Companion specification for Nonferrous Bolts, Hex Cap Screws, and Studs (mate with F467 nuts for matched-alloy assemblies)
    • ASTM F436 / F436M - Hardened steel washers (ferrous washer companion when nonferrous washers are not specified)
    • NACE MR0175 / ISO 15156 - Sour-service hardness limits for petroleum and natural gas industries
    • ASME B18.2.2 / B18.2.4.1M / B18.2.4.6M and ISO 4032 / 4033 / 4035 - Dimensional standards referenced by F467
    • DIN 934 / 439 / 6330 - Metric hex nut dimensional standards
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