Application

Balance & vibration control

Market Segment

Aerospace and defense

Materials

WHA

ADVANTAGES

H.C. Starck Solutions high-density balance weights offer high performance, compact products for applications where space is at a premium. Based on tungsten heavy alloys with densities over 60% higher than lead’s, our balance weights empower manufacturers with small-form ballast for maximum weight in the smallest space. This allows for greater positioning flexibility and overall improvements in confined space utilization.

APPLICATION

Our tungsten heavy alloy balance weights are ideal for fine balancing and vibration control in aerospace engineering. Manufactured from the highest quality tungsten heavy alloys, our balance weights offer a non-corrosive and highest density solution to both commercial and military aircrafts. Flight control systems, rotor and propeller blades, centre of gravity adjustments, and more; H.C. Starck Solutions delivers custom-built parts for various critical components of fixed and rotary-wing aircraft.

MARKET SEGMENT

The needs of three key market segments are served by our high-performance tungsten balance weights: aerospace, defense, and industrial processing. At H.C. Starck Solutions, we understand the differing objectives and critical to quality parameters of manufacturers and process engineers in these diverse market areas. Consequently, we engineer our balance weights using a choice of tungsten alloys from two world-recognized material families (Kulite® and HPM Tungsten).

Read More: Key Refractory Metals in Aerospace Markets

Decades of refractory metals expertise stand behind our manufacturing of exceptional quality balance weight for all applications across the aerospace and defense industries, as well as industrial processing sectors.

MATERIALS

Tungsten heavy alloy (WHA) is the perfect material for high-density objectives. H.C. Starck Solutions has decades of expertise in working refractory metals into bespoke end-use net shapes that meet critical mass/shape requirements.

Our tungsten balance weights are based on a choice of alloys under the Kulite® and HPM Tungsten brands, with a density range of approximately 17.0 – 18.5 g/cm3. See the table below for a complete breakdown of the tungsten alloys available from H.C. Starck Solutions.

Contact a member of the team today, or request a quote for our class-leading tungsten balance weights by filling in the form below.

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    Tungsten Balance Weights

    H.C. Starck Solutions, a worldwide manufacturer of tungsten balance weights made of technology metals , provides high performance solutions to customers in the aviation industry. Technology metals like tungsten alloys have been the choice material for machined and fabricated products in critical aerospace applications.

    Our machineable high-density tungsten alloys, with a density over 60 % higher than lead, help stabilize helicopter rotor blades and the control surfaces of ailerons, elevators, and rudder sections:

    • Aircraft and Helicopter Tungsten Balance Weights
    • Instrumentation Tungsten Balance Weights
    • Vibration Dampening Tungsten Weights

    Produced and Certified to AMS-T-21024, AMS 7725 and ASTM B777.

    Customer Collaboration with Tighter Process Controls

    As a vertically integrated manufacturer, we exercise tight control of all our processes from refining the raw materials to delivering high purity finished products. H.C. Starck Solutions has a unique global reach allowing for close contact and collaboration with our customers. Our experienced Research and Development department allows us to constantly be at the forefront of technological advancement and development of new products together with our partners in the industry.

    H.C. Starck Solutions supplies the following tungsten alloys:

    Kulite® and HPM Tungsten Alloys

    H.C. Starck Solutions supplies the long established Kulite® tungsten alloys from the U.S. (Table 1) and HPM tungsten alloys from Germany (Table 2).

    Table 1 – Kulite® tungsten alloys (K1700 thru K1850)

    Alloy Designation K1700 K1701 K1750 K1800 K1801 K1850
    Tungsten content (%) 90 90 92.5 95 95 97
    Density (g/cm3) 17 17 17.5 18 18 18.5
    (lb/in3) 0.61 0.61 0.63 0.65 0.65 0.67
    Hardness (Rc) 23 22 24 25 24 26
    Ultimate Tensile Strength (psi) 125,000 110,000 125,000 125,000 110,000 120,000
    (N/mm2) 860 760 860 860 760 830
    Yield Strength (psi) 85,000 80,000 90,000 90,000 85,000 95,000
    (N/mm2) 590 550 620 620 590 660
    Elongation % 12 4 10 8 2 6
    Modulus of Elasticity (psi x 106) 45 40 46 48 45 50
    (kN/mm2) 310 280 320 330 310 345
    Magnetic Properties slight none slight slight none slight
    Magnetic Permeability (µ) >1.05 <1.05 >1.05 >1.05 >1.05 <1.05
    Thermal Expansion Coefficient (x 10-6/K)
    (20 °C – 500 °C)
    5.1 5.4 4.9 4.8 5.0 4.8
    Thermal Conductivity (cgs) .20 .23 .24 .27 .32 .26
    Electrical Conductivity (% IACS) 11 14 12 15 16 16
    MIL-T-21014(D) class 1 1 2 3 3 4
    ASTM B777 class 1 1 2 3 3 4

    Table 2 – HPM tungsten alloys

    Typical properties of tungsten composite materials

    Inspection
    criterion
    HPM
    1700
    HPM
    1710
    HPM
    1701
    HPM
    1705
    HPM
    1750
    HPM
    1750
    sheet
    Tungsten content % 90.0 90.0 90.0 90.0 92.5 92.5
    Density g/cm³ 17.0 ± 0.2 17.0 ± 0.2 17.0 ± 0.2 17.3 ± 0.2 17.5 ± 0.2 17.6 ± 0.2
    Hardness HV 30 ≤ 320 ≤ 320 ≤ 320 ≤ 360 ≤ 325 ≤ 460
    Tensile strength
    (typical value)
    MPa 850 850 670 900 840 870
    Minimal yield strengt MPa 520 520 520 520 520 520
    Elongation
    (typical value)
    % 12 12 3 8 14 16
    Young’s modulus
    (average value)
    GPa 320 320 300 330 340 340
    Median coefficient of linear thermal expansion
    20 – 100 °C
    10-6/K 6.1 6.3 6.0 4.5 5.5 5.5
    20 – 300 °C 10-6/K 6.2 6.5 6.2 5.1 5.7 5.7
    20 – 450 °C 10-6/K 6.3 6.6 6.4 5.3 5.8 5.8
    Thermal conductivity W/mK ≥70 ≥70 ≥90 ≥70 ≥75 ≥75
    Electrical conductivity (average value) %IACS
    MS/m
    11
    6.4
    11
    6.4
    14
    8.1
    13
    7.5
    12
    6.9
    12
    6.9
    Specific electrical resistance
    (average value)
    µΩm 0.16 0.16 0.12 0.13 0.15 0.15
    Permeability µ > 1.05 > 1.05 < 1.05 > 1.05 > 1.05 > 1.05

     

    Inspection criterion HPM 1751 HPM 1760 HPM 1800 HPM 1810 HPM 1801 HPM 1850 HPM 1850W
    Tungsten content % 92.5 92.5 95.0 95.0 95.0 97.0 97.0
    Density g/cm³ 17.5 ± 0.2 17.6 ± 0.2 18.0 ± 0.2 18.0 ± 0.2 18.0 ± 0.2 18.5 ± 0.2 18.5 ± 0.2
    Hardness HV 30 ≤ 325 ≤ 325 ≤ 332 ≤ 332 ≤ 332 ≤ 340 ≤ 340
    Tensile strength
    (typical value)
    MPa 690 870 830 830 700 830 890
    Minimal yield strengt MPa 520 520 520 520 520 520 520
    Elongation
    (typical value)
    % 3 16 14 14 2 12 12
    Young’s modulus
    (average value)
    GPa 330 340 370 370 330 380 380
    Median coefficient of linear thermal expansion
    20 – 100 °C
    10-6/K 5.7 5.5 4.9 5.2 5.4 5.1 4.8
    20 – 300 °C 10-6/K 5.8 5.8 5.1 5.3 5.5 5.1 4.9
    20 – 450 °C 10-6/K 5.9 5.9 5.2 5.5 5.6 5.2 5.0
    Thermal conductivity W/mK ≥85 ≥75 ≥80 ≥80 ≥85 ≥75 ≥80
    Electrical conductivity (average value) %IACS
    MS/m
    15
    8.5
    12
    6.9
    13
    7.7
    13
    7.7
    15
    9.0
    16
    9.3
    16
    9.3
    Specific electrical resistance
    (average value)
    µΩm 0.12 0.15 0.14 0.14 0.11 0.10 0.10
    Permeability µ < 1.05 > 1.05 > 1.05 > 1.05 < 1.05 > 1.05 > 1.05

     

    Exceeds requirements of the following specifications: MIL-T-21014, ASTM B777 and AMS 7725

    Related Balance Weights Brochures

    Brochure NameDownload
    High Performance Solutions for the Aerospace MarketPDF Icon
    High Performance Solutions for the Defense MarketPDF Icon