ADVANTAGES
High density means more weight in less space. WHA 60% more dense than lead.
APPLICATION
Balance & Vibration Control
MARKET SEGMENT
Aerospace & Defense, Industrial Processing
MATERIALS
WHA
REQUEST A QUOTE
Please fill in the boxes on the contact form and a member of the team will contact you directly for a quotation.
Each quotation will be unique to the customer requirements so please give as much information in the contact form as possible, this will enable us to get the most accurate price back to you.
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
