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    2. ASTM F467 Grade R55111

    ASTM F467/F467M Grade R55111 Alloy 32 Nuts Specification

    Premium titanium alloy nuts engineered for corrosion resistance and industrial durability.

    ASTM F467/F467M Grade R55111 Alloy 32 Nuts are manufactured using high-performance titanium alloy material offering exceptional strength, lightweight performance, and superior corrosion resistance for aerospace and marine applications.

    ASTM F467/F467M Grade R55111 Titanium 32 Nuts Chemical Composition

    ASTM F467 UNS R55111 Titanium 32 Nuts Titanium and Titanium-Base Alloys A

    UNS Designation Number Alloy General Name Al C Fe Ti H N O Pd V Cr Mo Zr Sn Si Ru Residuals B
    each, max total, max
    ASTM F467/F467M Grade R55111 32 Titanium Ti-5-1-1-1 4.5- 5.5 0.08 0.25 balance 0.0125 0.03 0.11 . . . 0.6- 1.4 . . . 0.6- 1.2 0.6- 1.4 0.6- 1.4 0.06- 0.14 . . . 0.1 0.4
    • (A) All reported values are maximums, unless a range is specified.
    • (B) A residual is an element present in a metal or an alloy in small quantities inherent to the manufacturing process but not added intentionally. Residual elements need not be reported unless a report is specifically required by the purchaser.
    • (C) Ruthenium and Palladium, or both, may be added to Grade 19 for enhanced corrosion resistance as negotiated between purchaser and vendor. Chemical analysis is not required unless specifically negotiated.

    ASTM F467 R55111 Alloy 32 Titanium Nuts Mechanical Requirements

    ASTM F467/F467M Chemical Composition

    ASTM F467/F467M Titanium and Titanium-Base Alloys

    UNS Designation Number Alloy General Name Al C Fe Ti H N O Pd V Cr Mo Zr Sn Si Ru Residuals B
    each, max total, max
    ASTM F467/F467M Grade R55111 32 Titanium Ti-5111 4.5- 5.5 0.08 0.25 balance 0.0125 0.03 0.11 . . . 0.6- 1.4 . . . 0.6- 1.2 0.6- 1.4 0.6- 1.4 0.06- 0.14 . . . 0.1 0.4
    • (B) A residual is an element present in a metal or an alloy in small quantities inherent to the manufacturing process but not added intentionally. Residual elements need not be reported unless a report is specifically required by the purchaser.

    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 Ti-5111 F 467HT 24 HRC 105 113
    • (A) For aluminum and titanium alloys hardness values are for information only.
    • (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 Ti-5111 F467MHT 24 HRC 725
    • (A) For aluminum and titanium alloys hardness values are for information only.

    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 Titanium Grade 32 (R55111)?

    Grade 32 is a near-alpha titanium alloy (Ti-5Al-1Sn-1Zr-1V-0.8Mo) per ASTM F467 for elevated-temperature nut (sustained service to ~1000 F). Tensile 130 ksi+, yield 120 ksi+ depending on heat treatment. Niche grade for aerospace gas turbine and high-temperature chemical service.

    When choose Grade 32 over Grade 5 titanium?

    Grade 5 is limited to ~800 F sustained service; Grade 32 extends useful temperature to ~1000 F with better creep performance. Choose Grade 32 only when the elevated temperature requirement is genuine - otherwise Grade 5 is the lower-cost, higher-availability choice.

    Sour-service status?

    Yes - R55111 is NACE MR0175-listed.

    Dimensional pattern availability?

    Limited - low-volume specialty grade. Confirm availability with TorqBolt before specifying for production bolting. Most demand is for ASME B18.2.1 hex cap screws and ASME B18.3 socket head cap screws.

    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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